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    Discussion on Hexi Sub-CBD Development in Nanjing
    GUI Yaoyao, ZHU Xigang
       2010, 30 (2): 188-193.  
    Abstract1935)      PDF (480KB)(5926)      
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    Progress in Domestic and Foreign Study on Spatial Layout of Public Service Facilities
    CHENG Shunqi,QI Xinhua,JIN Xingxing,LI Damou,LIN Han
    TROPICAL GEOGRAPHY    2016, 36 (1): 122-131.   DOI: 10.13284/j.cnki.rddl.002795
    Abstract2189)      PDF (601KB)(3842)      
    One of the important reasons for the recent divergence in and outside our country is the gap among the levels of public service. As the carriers of the public service, the scientific and effective space layout of public service facilities is significant to realize the equalization of public service. This paper is a review of public service facilities spatial layout research at home and abroad. According to the time sequence, we discuss the progress in spatial layout studies from the research perspective, method and topics. The results show that: the theme of the foreign research experiences an evolution from layout pattern, space layout of the equality, and accessibility to spatial layout of the social differentiation and its formation mechanism; the perspective of foreign research develops from pure quantitative geography to multi-interdisciplinary subject crossing other subjects such as economics and sociology; the method develops from model establishment to integration of GIS and other methods. There exist significant gaps between the research in China and that in foreign countries. In China, the interdisciplinary mixture is insufficient. The methods are mainly derived from abroad on the whole. The theme of the study is narrow. We put forward some suggestions for future research: expand the connotation of accessibility and the connotation of fairness metrics to measure the equality, integrate multiple facilities layout based on the people-oriented idea, pay more attention to the promptness and variability of facilities, make full use of big data to carry out empirical research on small scale, realize equalization of public service facilities under the background of balancing the urban and rural areas.
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    Cited: Baidu(1)
    The Impact of COVID-19 on China’s Economy and Discussion of Policies‒Evidence from Listed Companies
    Zhang Kaihuang, Qian Qinglan
    Tropical Geography    2020, 40 (3): 396-407.   DOI: 10.13284/j.cnki.rddl.003252
    Abstract1336)   HTML48)    PDF (1011KB)(712)      

    The Corona Virus Disease 2019 (COVID-19) has collapsed the world’s economy. A discussion of the reaction to structural and regional policies is imperative for the Chinese government because the implementation of policies is limited. As the state of the stock market indicates the direction of the economy, the financial reports of some enterprises from China’s Stock market for the first quarter of 2020 were collected and analyzed. This was the period in which the productivity of the enterprises were severely impacted by the coronavirus pandemic with respect to industry, actors’ scale, and region. The results show: 1) Except agriculture, forestry, animal husbandry, and fishery, all other industries had lesser profit and limited operating cash flow, and their balance sheets had deteriorated. The services industry faced more challenges than the others. The behavioral decisions made by individuals, the governmental policies for lock-down, and the nature of industries were responsible for these detrimental changes; 2) The companies with small and medium market value were affected more than big enterprises. In Q1, big companies made more profits, optimized their operating cash flows, and stabilized their balance sheets. This is mainly because of the difference of operating ability among actors and the Matthew effect; 3) Owing to the differences in the population structure and land price in different regions, the manufacture, service, and building and estate industries faced greater challenges in the developed provinces than in the less developed regions. The pandemic adversely affected the finance industry in Beijing, Shanghai, and Guangdong; however, it showed improvement in Jiangsu. It has been observed that the financial structure in regions, and operating ability of companies were the main reasons for the negative impact on the finance industry. The medical industry was affected but progressed in areas with better industrial basement. This was because the demand for certain medicines and devices peaked during the period and the areas with better industrial base played more important role in fighting the virus. In this context, the authors discussed the two approaches: “Adopting a more proactive fiscal policy and deeply optimizing financial environment of enterprises,” and “Choosing policies implements regionally.” It can be argued that unilateral expansion of demand will result in a larger gap between demand and supply. This is disadvantageous because the global production system mainly depends on the manufacturing industry in China. The government should not only focus on resumption, but also start investment of new or traditional infrastructures. Moreover, owing to the uncertainty of the market, the factors that improve the balance sheet are few. Therefore, helping more entities by financial market and making the social capital more active have become the priorities for the government. In order to improve the manufacturing and service industry, undeveloped regions are encouraged to expand job opportunities, and the residents in developed regions are encouraged to consume more services and decrease the operating costs of the service industry. This can positively contribute to restoring the economy. Some measures adopted to benefit financial and building and estate industries are encouraging local commercial banks in medium-sized and small cities to provide loans to Small and Medium-Sized Enterprises (SMEs), boost infrastructure construction in developed regions, and loosen control of estate development. The policy makers of the medical industry were advised to focus on long-term development. Optimizing the financial environments for SMEs in medical industry and developing a multi-core, nation-wide distribution of industry are necessary for China.

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    Reflections of Urban Planning on the Context of an Aging Society
    LI Xiaoyun, TIAN Yinsheng, CHEN Jintang
       2011, 31 (6): 575-579.  
    Abstract2178)      PDF (54KB)(5044)      
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    Cited: Baidu(6)
    Evolution of Ecosystem Service Value of Typical Dike-Pond in the Pearl River Delta:A Case Study of Foshan
    Han Ran, Ye Changsheng
    Tropical Geography    2020, 40 (3): 562-574.   DOI: 10.13284/j.cnki.rddl.003249
    Abstract303)   HTML6)    PDF (2315KB)(752)      

    Dike-ponds are a type of ecological agricultural land formed by man-made depressions in ponds where silt is accumulated as dikes to farm fish and grow crops such as mulberry and sugarcane; they are mainly distributed in the Pearl River Delta. Ecosystem services refer to the living environment they provide for human beings, as well as the various types of ecosystem products and functions that are beneficial to human beings. In recent years, Ecosystem Service Value (ESV) has become a hot topic for scholars in China and abroad. Using the Pearl River Delta’s birthplace, Foshan City (FS), as a case study, the Millennium Ecosystem Assessment (MA) framework, which combines the characteristics of a dike-pond ecosystem and the social and economic conditions of the study area, is used to adopt the market price method, replacement cost method, and shadow engineering method to estimate the ESV of dike-ponds in FS in 2000, 2009, and 2017. Additionally, Dike-pond’s ESV in FS law of change was discussed and the influencing factors of ESV changes in dike-ponds were analyzed. The results show that during the study period of 2000-2017: 1) a few towns (streets) such as Lubao Town and Hecheng Street in the west and north, respectively, of FS have increased their dike-pond area, while Beijiao Town and Lecong Town in the east and south, respectively, have significantly decreased their dike-pond area to 19,244.47 hm2, which have been mainly transferred to construction land. 2) In 2000, 2009, and 2017, the ESV of dike-ponds in FS first decreased and then increased to 1,661.91×108 and 978.60×108, and 1,166.37×108 yuan, respectively. The overall trend is a declining one, with a total decrease of 495.54×108 yuan. In the three years, the proportion of adjustment functions in the total ESV is higher than 86%, which is the core function. Among the individual functions, the value of tourism and leisure increases the most, with an average annual growth rate of 19.36%. The value of climate regulation decreases significantly, by 589.37×108 yuan. 3) The ESV of dike-ponds in the southeast of FS is the highest. The western and northern regions are less affected by human activities and the ecological environment is suitable in this region; thus, the ESV of the dike-ponds increases accordingly. While the high level of industrialization and urbanization in the eastern and southern regions, serious pollution in the dike-ponds, and shrinkage of the dike-ponds all caused the ESV to decline, the material production and tourism and leisure values of the dike-pond of each research unit generally increased. The value changes of the remaining individual functions show strong consistency in space, i.e., the value of the towns (streets) in the northwest and southwest has increased significantly and the value in the southeast has decreased. 4) The results of a Geodetector probe show that a change in the Gross Domestic Product (GDP) of primary industries is the principal factor affecting the spatial distribution of the ESV of dike-ponds in FS, followed by the change in GDP, population density, population, investment in fixed assets, GDP of the secondary industries as well, and impact of policy factors, none of which should be ignored. Measures such as controlling the scale of development, restoring green vegetation, and giving importance to the advantages of the dike-pond landscape to increase the ESV of the dike-pond are all recommended.

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       2002, 22 (2): 125-129.  
    Abstract2123)      PDF (202KB)(3570)      
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    Cited: Baidu(20)
    Place and Placelessness: The Perception of Tourists' Local Food Taste in Hong Kong
    Tong Wen, Yulin Zhang, Yi Liang
    Tropical Geography    2020, 40 (5): 775-785.   DOI: 10.13284/j.cnki.rddl.003277
    Abstract222)   HTML5)    PDF (1248KB)(404)      

    Considering the debate between place and placelessness research brought about by globalization, scholars discuss their views around the simple relationship of "local-global" duality. However, existing research focusses on the powerful class characterized by wealth, ignoring the role of the general public as the disadvantaged group in the dual evolution of place and placelessness. In response to this problem, this study adopts a qualitative research method to conduct a content analysis on the online comments of Chinese and foreign tourists on local food in Hong Kong. The study's findings indicate the following. First, the experience evaluation of tourists shows that whether it is the innovation of food products, a diversified decoration of the dining environment, or the content and form of restaurant services, Hong Kong food culture reflects the integration of Chinese and Western cultures. Further, it has assimilated Western culture to adopt innovations while retaining traditional Chinese characteristics. The coexistence of place and placelessness shows that through globalization, tourists not only want to experience the new and exciting "place" of their target destination. They also need a standard "placelessness" that provides them with a sense of security and comfort. In this process, place and placelessness tolerate, transform, and promote each other and even generate new local products with global attributes. The counter-effects to globalization are reflected through such a process. That is, place and placelessness are not—as many scholars worry—being penetrated by globalization, but rather both can be transformed into each other, and then react to and redefine globalization. This is how a locality presents new cultural connotations in the process of constant internal and external interactions, thereby forming a "new locality," and global forces reconstruct the local meaning. Second, different from wealth, power, and culture, the influence of factors such as the community play a significant role in the process of globalization. People, particularly tourist groups, have a direct influence on wealth and power through consumer choice and the power of the culture subject gaze. The public's adherence to the place will have a direct impact on wealth and power through huge consumer demand, which will guide the protection and creation of local elements. This is the key to the formation of "global significance." On the contrary, globalization can produce a homogenized value identity that transcends the boundaries of the nation-state and then creates a universal standard space with placelessness. In this space, mass groups of different cultural backgrounds can quickly develop a sense of identity and comfort, which is relatively more helpful in ensuring the quality of consumer experience for such groups that rapidly travel worldwide. As previously mentioned, place and placelessness in the tourism space can be transformed into each other, and the process of transformation primarily depends on the value and meaning construction of the place by tourists in the subject's gaze. At the same time, different results will be produced due to differences in various social groups and cultural backgrounds. Nevertheless, globalization is reducing this cultural difference.

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    Zheng Jing, Xu Xueqiang, Chen Haoguang
    TROPICAL GEOGRAPHY    1994, 14 (2): 133-142.  
    Abstract1322)      PDF (642KB)(2578)      

    Based on the census data of 1991,the population structure in 91 blocks of Guangzhou and their characteristics on space distribution are discussed.Compered with that in 1982,the basic characteristics on space changes are indicated.1) The urban population density is variously high.In central part of the city,31.35% of the people live in 6.7% of the area.In spite of the situation like this,the density of the central part tends to decrease, but that of the marginal districts tends to increase.Additionally, the increasing speed of population in the central pert is lower than that in the marginal ones.2)The population average age in the central pet is larger than that in the marginal.The communities of Core Family appear in the newly-built residential parts around the city border.From the structure of reseneration ages,the percentages of age from 0 to 14, from 15 to 49 and over 50 in central part are 16.1%, 59.4% and 24.5%,respectively.But those in the marginal districts are 14.9%,68.2% and 16.8%.In Guangzhou Economic and Technical Development Zone which rose in recent years, the Percentase of young people is above 90%.3)The sex ratio varies greatly(95.63-274.03).The further it is away from the central part, the higher the sex ratio is.This relates to the difference of occupation's space distribution, age structure and historical male immigrants.4)The distribution of occupation smicture matches the industrial structure.The 3rd industrial area is located at the northeast.The fixture of the 1st and 2nd stand at southwest.In the middle, the mixture of the 2nd and 3rd industries.5)The average education level is 9.35 years.It is high in the east, low in the west.This matches the space structure of occupation types.6) Muslin, Zhuang, Man are the main minority nationalities.Their percentages to the total population are 0.21%, 0.13% and 0.13% respectively.Although their population is small, their space distributions are relatively concentrated with lucrative businesses.General speaking, the space distribution of population structure is quite disbalanced.It is the combinative consequence of natural and historic background,city functions arrangment,industrial structure and urban planning.

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    Cited: Baidu(11)
    ZHENG Zhi-qing
       2005, 25 (3): 243-247.  
    Abstract1729)      PDF (232KB)(3083)      
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    Cited: Baidu(7)
    Color Geography Theory and Its Development in China
    WANG Yanhui, ZHANG Xinyan, YUAN Shuqi
       2010, 30 (3): 333-337.  
    Abstract2203)      PDF (74KB)(2022)      
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    Cited: Baidu(3)
    Strategic and Spatial Pattern Assessments of Spratly Islands Occupied by Foreign Countries
    Kaifu Min, Liang Cheng, Xiao Zhou, Nan Xia, Ning Li, Manchun Li
    Tropical Geography    2020, 40 (4): 684-693.   DOI: 10.13284/j.cnki.rddl.003243
    Abstract257)   HTML8)    PDF (2217KB)(326)      

    There are up to 44 islands and reefs illegally occupied by foreign countries in the Spratly Islands, that is a serious threat to China's national security. Therefore, the strategic value of the occupied islands and reefs in the Spratly Islands region should be evaluated. Previous studies concentrate on the period before large-scale construction in the region. Additionally, they lack consideration of the islands development potential. Considering this potential, radiation capacity, and carrying capacity, the present study investigated 26 influence factors, their respective assessment values were calculated. The subjective and objective integrated method was used to determine the weight of each factor. The linear weighting method was used to obtain the evaluation results of the strategic value of 44 islands and reefs occupied by Vietnam, Philippines, Malaysia, and Brunei. The results were spatially interpolated to identify their spatial pattern characteristics. The main results are as follows: 1) The strategic value evaluation of islands and reefs shows the gradient distribution characteristics. The Danwanjiao reef occupied by Malaysia, Nanweidao Island occupied by Vietnam, and Zhongyedao Island occupied by the Philippines are the ones with highest strategic value, and their evaluation values are 100, 98.42, and 97.09, respectively. The islands and reefs with lower strategic value were mainly sandbars and hidden shoals, such as the Orleana Shoal and Bombay Castle, with scores of less than 40. 2) The strategic value, radiation capacity, carrying capacity, and construction potential of islands and reefs all have a multi-core spatial distribution pattern, in which the spatial distribution pattern of their radiation capacity is the "NW-SE band", the areas of highest and high grades extend from northwest to southeast of the study area and decrease to both sides (northeast and southwest). There are two core regions and two secondary core regions in the pattern of radiation capacity. The spatial distribution pattern of carrying capacity shows a "horizontal strip", which decreases from north to south, in which there is one core region and two secondary core regions. There are three core regions and two secondary core regions in the spatial distribution pattern of island potential and strategic value of islands and reefs. 3) Vietnam occupies the most islands and reefs and has a wide spatial distribution. In the spatial distribution pattern of strategic value of islands and reefs, there is one core region and two secondary core regions closely related to Vietnam. Bishengjiao, Liumenjiao, Nanhuajiao, Wumiejiao, and West reefs are occupied by Vietnam and have a great potential for building islands and reefs, as their geographical location is of great strategic significance. Further construction would support the core areas of islands and reefs occupied by Vietnam, which could lead to a pincer attack on China's garrison islands and reefs, thereby requiring close attention.

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    Urban Villages' Redevelopment in Cities of Migration through the Lens of Cultural Identity: A Comparative Study of Singapore and Shenzhen
    Di Zeng, Jin Zhu, Shenjing He
    Tropical Geography    2021, 41 (3): 449-460.   DOI: 10.13284/j.cnki.rddl.003337
    Abstract535)   HTML30)    PDF (2934KB)(307)      

    With a strong emphasis on historical heritage and culture-making, culture-led redevelopment has become an important policy in many megacities to revitalize declining areas, such as urban villages. However, local governments have different understandings of cultural development and historic preservation and often take them at face value while ignoring the internal mechanisms. For cities of migration, cultural identity has richer connotations. The time-space nexus between the origins and destinations of migrants is highly significant for fostering a diverse and more inclusive urban culture. Taking three urban villages in Singapore and Shenzhen as empirical cases and using the theoretical perspective of cultural identity, this paper explores the culture-making process in the redevelopment of urban villages. We argue that the essence of cultural identity lies in social relations, not merely in visual symbols and images, and understanding cultural identity requires comprehending the relations between the global and the local, as well as between the past and the present embedded in places. The paper starts with an interpretation of the culture-led macro policy, followed by an analysis of urban redevelopment's internal political and economic driving forces. Based on data from participant observation and semi-structured interviews in both cities, a qualitative analysis on the modality, mechanism, and influences of identity-making in urban village redevelopment was conducted. Research findings include differences in the dominant stakeholders' attitudes toward cultural identity, especially migrants' identity, in the redevelopment modalities in the two aforementioned cities. These differences have led to different outcomes. The case of Singapore's Geylang Serai Village centered on the living needs and activities of Malay migrants, who were the main residents there, to conduct the regeneration. Further, the Housing and Development Board (HDB) issued a policy to ensure residents' housing rights. Therefore, the program maintained the continuity of the existing community by protecting the spontaneously formed identity while developing the showcase economy based on simultaneous market activities. Regarding Shenzhen, developers of Nantou Ancient City and Gankeng Hakka Town focused on specific historical periods and designated the architectural style as the local characteristic in order to develop the tourism economy. However, the top-down imposed identity had little to do with the migrants' community, which led to their exclusion and broke down their established social networks, indicating that the mere focus on beautifying the physical environment will lead to gentrification catering to middle-class aesthetics. The study findings point to the conclusion that the designation of the cultural identity of a place is, effectively, the use of cultural capital. The voice of identity in cultural discourses represents the social right of a community to urban spaces. Therefore, culture-led urban village redevelopment should focus more on local communities' social relations and actual needs in order to promote a more just, inclusive, and sustainable urban redevelopment.

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    Grain-Size Fractal Dimension of Aeolian Sand during the Last Glacial Period: The Houtian Section of Nanchang and Its Paleoenvironmental Significance
    Jiangzhen Zhan, Zhiwen Li, Zhigang Wang, Li Sun, Wubiao Li, Lan Du
    Tropical Geography    2020, 40 (6): 1075-1084.   DOI: 10.13284/j.cnki.rddl.003288
    Abstract186)   HTML5)    PDF (2489KB)(284)      

    Fractal theory can be used to reveal the fractal features of many geographic phenomena, and the composition of sediment grain size has been successfully applied to the study of the evolution of geographic environments. The fractal dimension has widely been used as a new grain size index, which is consistent with the environmental changes reflected in the traditional analysis of grain size and composition; however, whether the fractal dimension can also reveal environmental changes in the Poyang Lake area in the mid-subtropics has not yet been determined. This study analyzes the fractal dimension characteristics of Houtian sandy land based on the results of grain size and the power of the exponential function relation method in fractal theory. A series of dune sand-sandy paleosol sequences were developed intermittently on the terraces of the lower reaches of the Ganjiang River. Based on multiple comprehensive investigations, the Houtian section, with rich sequences and a relatively continuous deposition, was selected in Houtian sandy land, Xinjian County, and Nanchang City. With the research carried out, Optically Stimulated Luminescence (OSL) age and grain size tests were completed. A comparison of the fractal dimensions with clay, average grain size, winter and summer monsoon intensity-sensitive grain size, and the Nanjing Hulu Cave stalagmite oxygen isotope gave the following results: 1) Combined with the results of OSL dating and deep-sea oxygen isotope and stratigraphic characteristics, an age-depth framework was constructed based on the segmented sedimentation rate interpolation. The sand dune-sandy paleosol sequence of the Houtian section was mainly formed during the last glacial period (14.9-77.0 ka). The entire section has a good fractal structure, with the dune sand's fractal dimension at 2.04-2.62 (average 2.34) and the sandy paleosol at 2.24-2.70 (average 2.51). 2) The fractal dimension is positively correlated with the summer monsoon intensity-sensitive grain size, negatively correlated with the winter monsoon intensity-sensitive grain size, and closely related to the standard deviation (whereby the smaller the standard deviation, the smaller the fractal dimension). Medium silt, coarse sand, and winter monsoon intensity-sensitive grain size content are higher during the developmental period of the dune sand, and the average grain size is thicker. The standard deviation is smaller, the sorting is better, the degree of self-organization is higher, and the fractal dimension is smaller during the development period of the sandy paleosol. Due to the warm and humid climate, the weathering pedogenesis is stronger; the content of clay, fine silt, and summer monsoon intensity-sensitive grain size has increased significantly; the average grain size is finer; the standard deviation is larger; the sorting is worse; the self-organization is lower; and the fractal dimension is significantly larger. As a result, clay and fine silt formed by weathering sedimentation have the most significant impact on the fractal dimension. 3) The fractal dimension shows some alternating peak-valley cycles in the vertical direction. The peak values correspond to the early MIS2, MIS3c, and MIS3a stages, indicating a strong summer monsoon and a warm and humid climate; the valley values correspond to the late MIS2, MIS3b, and MIS4 stages, indicating that the winter monsoon is strong, and the climate is dry and cold. The results indicated that three climate warming cycles have occurred in the Houtian sandy land. At the same time, the fractal dimension reveals that the H5 and H6 events, which occurred in the HTS3b and HTS4 stages, show that the winter monsoon is the strongest and the summer monsoon is the weakest. Further, the sequence of aeolian sand deposition in the Poyang Lake area is practically synchronized with global climate change and extreme cold weather events.

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       2002, 22 (2): 134-137.  
    Abstract2305)      PDF (176KB)(2878)      
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    Cited: Baidu(5)
    Progress of the Supply of Urban Public Service Facilities in Western Countries and Its Enlightenment to China
    GAO Junbo, SU Hua
       2010, 30 (1): 8-12,29.  
    Abstract2369)      PDF (201KB)(2841)      
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    Cited: Baidu(13)
    Evolution of the Structural Characteristics and Factors Influencing the Knowledge Network of the Guangdong-Hong Kong-Macao Greater Bay Area
    Gao Shuang, Wang Shaojian, Wang Zehong
    Tropical Geography    2019, 39 (5): 678-688.   DOI: 10.13284/j.cnki.rddl.003174
    Abstract482)   HTML7)    PDF (12580KB)(327)      

    Increasing globalization and informatization has enhanced the intercity exchange of information, materials, and energy. Cities no longer represent isolated systems. Instead, they are closely linked to each other, forming regional or global city network systems. Therefore, the study of urban networks has attracted massive attention in human geography and urban planning. In particular, the emergence of the concept of “space of flow” provides a new perspective and paradigm for the interpretation of regional spatial structure. Based on the data collected from domestic and foreign journal database published from 2000 to 2018, this paper uses social network analysis method and spatial structure index method to explore the evolution process of the overall characteristics, organizational structure, and the spatial pattern of the knowledge network in Guangdong-Hong Kong-Macao Greater Bay Area. Furthermore, it identified the evolution trend of factors influencing the knowledge network in the Bay Area. The results also revealed the following: 1) Over the duration of the research, publications in the Greater Bay Area significantly increased. The pattern of the knowledge network gradually evolved from the “single power” represented by Guangzhou to “simultaneous development” that included Guangzhou, Shenzhen, and Hong Kong. Although Hong Kong is at the core of the knowledge network, it establishes close knowledge cooperation primarily with Guangzhou and Shenzhen due to administrative barriers. 2) The knowledge network of the Guangdong-Hong Kong-Macao Greater Bay Area represents a “core-edge” structure with the knowledge connection in the western region significantly lower than that in the eastern region. The knowledge network densities and spatial structure indices of the Guangdong-Hong Kong-Macao Greater Bay Area suggest an increasing volatility. In 2016, the knowledge network density of the Bay Area attained the maximum value, indicating the development and maturity of the overall knowledge connection of the Guangdong-Hong Kong-Macao Greater Bay Area. In addition, the spatial structure indices demonstrate an alleviation of polarization characteristics of knowledge networks in the Bay Area, despite persistent significant imbalance. 3) The demand of the knowledge activity actors such as universities and scientific research institutions in the Bay Area is the internal driving force promoting knowledge cooperation among cities. The knowledge environment and the knowledge connection channels are the external driving forces of the regional knowledge cooperation network. The influence of endogenous and exogenous factors is responsible for the output of knowledge cooperation, resulting in the development of the knowledge network in the Guangdong-Hong Kong-Macao Greater Bay Area. This study provides a reference for the development of innovative collaborative paths in the Guangdong-Hong Kong-Macao Greater Bay Area by refining the characteristics of Bay Area’s knowledge network.

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    Analysis of Climatic Characteristics and Trend in Typical Regions with the Same Latitude as the Nanling Moutainous Area
    ZHOU Ping and LIU Zhiyong
    TROPICAL GEOGRAPHY    2018, 38 (3): 299-311.   DOI: 10.13284/j.cnki.rddl.003052
    Abstract1112)      PDF (1834KB)(723)      
    Based on the observations of 91 meteorological stations and an atmospheric circulation model (CCSM3),the climatic characteristic parameters of typical regions with the same latitude as the Nanling mountainous area were analyzed,the temperature and precipitation in different regions were forecasted until 2099,and the sensitivity of net primary productivity to temperature and precipitation was explored.We further explored the possible causes of climate difference in typical regions with the same latitude as the Nanling moutainous area.It has showed that arid and humid periods had different patterns among the studied regions.The Sahara Desert,the Arabian Desert and the Thar Desert only had an arid period,whereas both the Mexican Dryland and Nanling had a wet (moist and even humid) period.However,the seasons in which wet periods appeared was different between these two regions; Nanling had a rainy season during the spring and summer during plant growth,while the rainy season occurred in autumn in the Mexican Dryland.The potential evapotranspiration,wind speed and sunshine fraction of the Sahara Desert,the Arabian Desert and the Thar Desert were higher than those of the Mexican Dryland and Nanling,but the precipitation showed the opposite pattern.The water vapor pressure in the dry season of the Mexican Dryland was close to those of the Sahara Desert and the Arabian Desert but lower than the values for the wet season in the Mexican Dryland and those of the Thar Desert and Nanling.In the B1 climate scenario,a t-test of the temperature and precipitation data for every 20 years during the period 2000–2099 and 1981–2010 showed a significant upward trend (P<0.001) in the future temperature of the five typical regions.In contrast,precipitation showed a significant decrease or significant increase in different proportions in different stages and regions,even though there was an increasing trend overall.The sensitivity of the net primary productivity to temperature was zero in all five studied regions,indicating that the precipitation is a limiting factor for all studied regions.The deserts of the Sahara Desert and the Arabian Desert were significantly more sensitive to precipitation than the Mexican Dryland,the Thar Desert and Nanling.In addition to climate change,the reasons for different climatic conditions in Nanling moutainous area and other regions with same latitude include probably the spatial position of each region to the ocean and land,disturbance of human activities,and the roughness of topography.
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    Zhang Ke, Huang Yukun
    TROPICAL GEOGRAPHY    1995, 15 (4): 295-305.  
    Abstract1545)      PDF (1557KB)(932)      

    Three geonlorphictheories i.e.dynamic equilibrium,piedmonttreppen as well as the geomorphic cycle are briefly discussed in the paper.It is obvious to know that accordant summits and stepped landforms are of various genesis indeed,and planation surfaces should be the elevated peneplain and multiple planation surfaces excluding to faulting must be responsible for multiple geomorphic cycles.It is not easy to identify the planation surfaces from the accordant summits with other origins by general methods.However,using a fuzzy model of planation surfaces,combing with three standards of planation surfaces identification,the planation surfaces in north Guangdong are recognized.They are: the North Guangdong Surface (1010-1350m above sea level (ASL),the Yanashan Surface (610-780m ASL),the Renhua Surface (410-460m ASl) and the Yingde Surface (300-350m ASL) respectively,the antic characteristics of which are also presented.The strata records in the basins both in enclosed and nearby areas as well as in the continental shelf suggest that the ages of the four surfaces are late Cretaceous to early Oligocenc,middle Oligocene to early Miocene,middle Miocene to late Pliocene and Quaternary respectively.The researches on the planation surfaces in the region also manifest that the fault-block movemant including their uplifting,subsiding and tilting is the basic feature and that the height of the North Guangdong Surface can represent the maximum elevation in neotectonic period in northern Guangdong region (estimated to exceed 1300m).

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    Cited: Baidu(25)
    The Initiation Time of the Holocene Coral Reef at the Chenhang Island (Xisha Islands) and Its Significance as a Sea Level Indicator
    Qin Yeman, Yu Kefu, Wang Rui, Jiang Wei and Xu Shendong
    TROPICAL GEOGRAPHY    2019, 39 (3): 319-328.   DOI: 10.13284/j.cnki.rddl.003128
    Abstract643)      PDF (16016KB)(350)      

    This study relies on analyses of the top layer of the material extracted from Well Chenke-2, which is part of a coral reef drilling program in the south-east of Chenhang Island, Xisha Islands. The age of the material at the bottom of the borehole was determined by high-precision uranium dating technology. Five coral samples were selected for the U-Th dating. The five groups of data can be clearly dated to the Holocene or to the Pleistocene. The Holocene part includes samples CK2-15, CK2-16, and CK2-17. Their age was determined as 7 914 ± 67, 7 552 ± 73, and 7 584 ± 55 years, respectively. The Pleistocene part includes samples CK2-18 and CK2-19. Their age was determined as 112 700 ± 700 and 128 100 ± 1 000 years, respectively. Furthermore, a MAT-253 isotope mass content of δ13C, δ18O, and strontium in 21 whole rock samples extracted in the depth interval 0-21 m. Based on the contents of these three elements, the interval can be divided into two parts. The content of δ13C, δ18O, and strontium in the depth interval 0-16 m is higher, with average values of 0.647‰, -3.392‰, and 0.843%, respectively, than that in the depth interval 17-21 m, with average values of -3.185‰, -7.994‰, and 0.174%, respectively. On the basis of the U-Th age, and considering that the contents of δ13C, δ18O, and strontium decrease evidently between 16 and 17 m, it can be concluded that the boundary between the Holocene and the Pleistocene corals is located at a depth between 16 and17 m in Well Chenke-2, and that the age of the corals determined by uranium dating in the upper part of the boundary represents the initiation time of the Holocene reefs. Therefore, it is concluded that the Holocene coral reefs in Chenhang Island started to develop 7 900 years ago, basically simultaneously with most of the Holocene reefs in the Indo-West Pacific, Central Pacific, and Caribbean. The Holocene reefs are 16.7 m thick, and are in unconformity with the late Pleistocene coral reefs (aged 110 ka). Considering the relative stability of the Neotectonic activities in the study area, as well as the fact that the reef flat of the modern coral reefs in the South China Sea is basically located at the low tide height, and that the borehole of Well Chenke-2 is located approximately 2.9 m above the modern reef flat, it is speculated that the top of Well Chenke-2 was originally located about 13.8 m below the low tide level of the modern sea. In other words, the sea level at Xisha Islands 7 900 years ago was about 13.8 m below the modern sea level. This result provides new information for understanding the development history of the Holocene coral reefs in the South China Sea and the sea level changes in the area.

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    Natural Environment, Resources and Development of the South China Sea Islands: The 70th Anniversary of Recovery of the South China Sea Islands(3)
    ZHAO Huanting,WANG Lirong,YUAN Jiayi
    TROPICAL GEOGRAPHY    2017, 37 (5): 659-680.   DOI: 10.13284/j.cnki.rddl.002983
    Abstract4222)      PDF (3441KB)(1000)      
    Combined with the work of several generations of scientists from China who carried out scientific investigation in the South China Sea Islands in the past century, natural environment of the South China Sea Islands is comprehensively analyzed on the basis of regional geologic landforms, climate, marine hydrology, marine organism, terrestrial biota, soil, natural complex and natural regionalization. Natural resources of the South China Sea Islands are explained in detail, such as territorial resources, fishery resources, tourism resources, oil and gas resources, natural gases hydrates resources, terrestrial organism and water resources in lime-sand islets, port and navigational channel resources, and ocean-atmospheric energy resources. According to the natural endowment and importance of strategic position, suggestions about the scientific development of the South China Sea Islands are proposed. It is considered that the development of the South China Sea Islands should include tourism, fishery and aquaculture in lagoon of atoll, while more attention should be paid to the exploitation of ocean oil,gas and natural gases hydrates resources.
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    On Characteristics and Spatial Difference of Floating Populations in Guangzhou
    YAO Hua-song, XU Xue-qiang, XUE De-sheng
       2008, 28 (3): 259-264.  
    Abstract2149)      PDF (266KB)(2654)      
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    Cited: Baidu(20)
       2002, 22 (1): 28-33.  
    Abstract1565)      PDF (287KB)(1615)      
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    Cited: Baidu(3) Baidu(3)
    Connotation and Characteristics of Landscape Scale, Process and Pattern (LSPP) Research
    WANG Ranghui
    TROPICAL GEOGRAPHY    2018, 38 (4): 458-464.   DOI: 10.13284/j.cnki.rddl.00306
    Abstract892)      PDF (579KB)(462)      
    Landscape scale, process and pattern (LSPP) and their interaction are the core of landscape ecology research. Based on the analysis of landscape scale, landscape ecological process and landscape pattern, the main characteristics of the integration concept of LSPP are clarified and the coupling relationship between elements in LSPP is explored. Research shows that the integration of LSPP has certain theoretical value, and the spatial and temporal scale of landscape is the important basis of LSPP, which reflects the landscape process and its ecological effects. Landscape ecological studies in the structure, function and dynamic as well as LSPP theory and application problems, in the new era of complicated ecological environment, supported by the scene simulation technology, data mining technology, and ecological IOT technology, would promote the mechanism research and application of landscape ecology paradigm of expanding and deepening, and would have important guiding significance for the current regional development and ECC.
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    Formation and Evolution of the Granite Landscapes in Wuhuangshan National Geopark,Pubei,Guangxi
    WEI Yuelong,WANG Guozhi,CHEN Weihai,LUO Shuwen,LUO Qukan
    TROPICAL GEOGRAPHY    2017, 37 (1): 66-81.   DOI: 10.13284/j.cnki.rddl.002915
    Abstract2207)      PDF (28589KB)(987)      

    Wuhuangshan Geopark which has been developed in the Pubei pluton is the typical observation point of the Darongshan-Shiwandashan granitoid belt and S-type granite. The granite landscapes in the Geopark are generally classified into five categories: spheroidal stone, mountains, platform, gorge, and hydrological heritage. All of them have been distributed orderly and intensively in the different zones of the granite mountains that are relative independent, and showed obvious vertical differentiation features. These granite landscapes constitute a typical, majestic, beautiful and precious south subtropical granite landscape group and spheroidal stone group with spheroidal stone landscape at the core and mountains, platform, pools group and waterfall group as the important complement. Based on the analysis and investigation about the regional geologic background of the geopark and the characteristics of the granite pluton, this paper systematically studies and discusses the formation and evolution of the granite pluton and the granite landscapes in the geopark. Some main conclusions held by the authors are as follows: 1) During Middle Triassic, there was large-scale magmatic activity in this region, then a giant granite batholith with the continuous time and the integrity of formation, namely, Pubei pluton was gradually formed after a series of processes, i.e. magma emplacement, differentiation, cooling crystallization; and then this pluton was uplifted, denuded and exposed to the earth’s surface to form mountains. 2) Since Quaternary, controlled jointly by humid-warm climate, surface water and granite pluton in which primary and epigenetic joints developed well, the ability to converge all forms of surface water has been gradually increased from mountaintop→mountainside→foothill, the corresponding erosion has been gradually increased but weathering has been gradually weaken from mountaintop→mountainside→foothill. After going through the process of horizontally–vertically differently erosion, washout and weathering during the long geological period, the typical south subtropical granite landscape group in the geopark has been gradually formed.

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    Variation in Turbulence Degree with Height and its Dependence on Urban Macroscopic Topography
    Li Daquan, Sun Wu, Ouyang Ruikang, Huang Sheng, Gao Mengyuan, Li Qingxiang and Huang Qiming
    TROPICAL GEOGRAPHY    2019, 39 (3): 365-376.   DOI: 10.13284/j.cnki.rddl.003127
    Abstract478)      PDF (28900KB)(285)      

    Wind speed and turbulence are two closely related indicators that measure the properties of a wind profile. Obtaining an insight into the development of turbulence over a complex urban terrain can help deepen the understanding of the performance of urban wind farms. In this research, three building models with vertical scales 1:2000, 1:1000, and 1:500, respectively, were constructed. Using large boundary-layer wind tunnels and generating wind from two directions (northwest and southeast), the variation in turbulence with height over a complex urban terrain, and its dependence on the macroscopic terrain characteristics, were analyzed in a neutral flow simulation. Based on the experimental data obtained in the wind tunnel, the two model coefficients A and B were determined with respect to four types of boundary-layer roughness, under neutral flow or with turbulence varying with height at different vertical scales. In both cases, the average correlation of the proposed model was about 0.8. A close relationship between the wind profile index and the turbulence at different heights was observed. Based on the profile index α the turbulence at different heights could be predicted, so that the variation in turbulence with height over a complex urban terrain could also be quantified. Generally speaking, the turbulence decreases with altitude, and the maximum turbulence develops at the bottom. However, there are exceptions. It is common that the turbulence of the hole at the lowest measuring point is not the largest, which makes the shape of turbulence change with the height like a hook. The shape of turbulence varying with height can be summarized into four types. The height at which the maximum turbulence occurs is found to be concentrated in the range 0-0.2 h (where h is the dimensionless unit), which makes up more than 80% of the total number. Therefore, in the height range 0-0.2 h above the urban terrain, the wind direction and velocity of the airflow showed complex patterns, and turbulence is extremely developed, with an important impact on the diffusion of urban pollutants and the transfer of heat. Using the existing model, the main coefficient of the turbulence model corresponding to a given height could be determined, with high precision accuracy, according to the four kinds of boundary-layer roughness and the different vertical scales. The development along the height of the non-maximum turbulence intensity depended on the difference between the actual wind profile and the standard wind velocity at the same height, whereas the maximum turbulence level under the given urban topography occurred within the narrow range 0-0.2 h. The turbulence degree index β was used to characterize the variation of turbulence intensity with height. The exponential β of the turbulence intensity decreased with increase in the exponential alpha of the profile, regardless of the shape of the terrain (e.g., a ridge or a flat terrain). It was shown that the overall turbulence profile increases from the upwind and top areas to the leeward area, and increases gradually along the wind flow direction. Turbulence profile also has a strong dependence on the terrain and the wind path, and has the same flow characteristics as those over a simple terrain. At the same time, the shape of the β isolines of the three models did not show the same overlap. On the contrary, great differences were observed. This shows that in the past, when the wind tunnel simulations were carried out, the method of ensuring the number of thunderbolts simply by increasing the vertical scale was affected by a large uncertainty.

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    Zong Yongqiang
       1987, 7 (2): 117-127.  
    Abstract1219)      PDF (3066KB)(762)      
    Zong Yongqiang (Guangzhou Institute of Geography)The depositional cycles of the Quaternary in the Hanjiang Delta have been distinguished according to the comprehensive facies analysis of 7 tipical bore hole sections and the comparison among the other 13 bore hole sections.The division basis of the depositional cycles,which includes the analysis of fossil diatom,spore-pollen,grain size,trace element and heavy mineral,has been introduced in detail from FIK25 bore hole section as a sample.It has been considered that the Quaternary of the delta is composed of two depositional cycles from land to delta facies and each cycle includes three or four subcy-cles from deita plain to delta front or from delta front to predelta.Regional diversity and chronology of the depositional cycles in this area have been represented and the transgression history of the delta area,which is based on the division result of the depositional cycles,has also been discussed.
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    Cited: Baidu(2)
    Topography,Morphological Characteristics and Formation of Weathering Pit in the Miaowan Island, Guangdong, China
    HUANG Rihui,LIU Yun,WANG Wei
    TROPICAL GEOGRAPHY    2016, 36 (2): 284-295.   DOI: 10.13284/j.cnki.rddl.002825
    Abstract1899)      PDF (14608KB)(668)      
    Weathering pit is a common rock landscape in the East of China and there are a variety of explanations for its formation. In the thesis, the topography features and its morphological parameters of the weathering in the Miaowan Island are measured and recorded in detail. Also, the debris inside the weathering pits, parent rocks and weathering profile samples were collected. After that, they were analyzed by XRF(X Ray Fluorescence) and XRD (X-Ray Diffraction). Based on the previous factors, the topography and morphological features, chemistry and its mineral features of weathering pit were put under analysis and the genetic mechanism of the development of weathering pit is explored as well. According to the results, firstly, the development of weathering pit is not relevant to its altitude. Weathering pit of various sizes and depths might appear on any rocks that are flat and exposed at any height. Secondly, the various sizes and depths of weathering pit represent different degrees of development. Thirdly, the speed of the development of the caliber in weathering pit is higher than that of its depth. Also, the speed of the development of weathering pit’s long axis is higher than that of its short axis. There are spillways in majority of weathering pits and the groove on the wall is of the same height of the spillway. Fourthly, the element migration characteristic of the debris in the weathering pits and difference of CIA value (chemical index of alteration) between the debris and the parent rocks represent the chemical weathering cause of the weathering pit. Fifthly, the difference of the ratio of quartz to feldspar between the weathering pit’s debris and parent rocks can represent the cause for weathering pit by different weathering of minerals.
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    An Analysis of Industrial Upgrading Path and High-end Oriented Strategy Based on Global Value Chain in Shunde District
    JIN Lixia, LI Xun, LIU Wei
       2010, 30 (3): 260-265.  
    Abstract1746)      PDF (103KB)(1829)      
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    Cited: Baidu(1)
    Spatial Pattern and Influencing Factors of the Consumer Service Industry in Shenzhen Based on Multisource Big Data
    Na Wang, Jiansheng Wu, Zifeng Peng
    Tropical Geography    2021, 41 (5): 956-967.   DOI: 10.13284/j.cnki.rddl.003381
    Abstract89)   HTML8)    PDF (1890KB)(199)      

    The consumer service industry directly provides residents with material and spiritual living consumption services and products to meet residents' consumption needs. The reasonable spatial layout of the consumer service industry is of great significance for improving residents' quality of living, optimizing the urban spatial structure, and alleviating urban problems. Based on consumer service point of interest (POI) data, mobile phone signaling data, and population data from Shenzhen, using the nearest neighbor index, kernel density, and entropy index methods, this study analyzes the spatial pattern of the overall and different types of consumer service industry as well as the spatial characteristics of the degree of mixing in the consumer service industry in Shenzhen. Using the Geodetector method, this study also detects the impacts of seven factors, including population, traffic, economy, and space dimensions, on the overall and different types of consumption service industry as well as analyzing the impacts of population age structure on the spatial pattern of this industry and its types. This study is expected to provide a theoretical and decision-making basis for urban planning and development in Shenzhen and other cities. The results show that: 1) The spatial distribution of the consumer service industry in Shenzhen is unbalanced and is concentrated in the central and western regions. The consumer service industry presents the spatial characteristics of two core areas and three belt areas. The two core areas are the Dongmen business area in Luohu District and the Huaqiangbei business area in Futian District. The three belt areas consist of the Luohu-Futian belt, Nanshan-Baoan belt, and Longhua belt. The spatial distribution of the consumer service industry has developed along strips and is mainly concentrated in the areas around the main roads and rail lines. 2) The spatial agglomeration characteristics of the overall and different types of consumer service industry are remarkable and differentiated in Shenzhen. The spatial distribution characteristics of most types of consumer services are similar to those of the overall consumer service industry. The development of industry in some areas has resulted in differences in the spatial distribution of certain categories. 3) The balance of the consumer service industry is better in the Luohu, Futian, Nanshan District and worse in the other Districts. The high balanced areas are the edge areas outside the two core areas, rather than the two core areas with the highest POI density. 4) Population density factors are the most important factors affecting the spatial pattern of the consumer service industry, followed by traffic factors. The influence of economic and spatial factors is relatively low. 5) The population of people aged 19-35 has the greatest impact on the density of the consumer service industry. Age groups have different impacts on the spatial distribution of different types of consumer service industries because of specific needs. These results are consistent with the spatial planning of urban functional zoning and industrial development layout in the Shenzhen Urban Master Plan (2010-2020). Combining these results and current urban development activities, this study provides suggestions for optimizing the spatial layout of the consumer service industry in Shenzhen.

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    Effects of Greenway Construction on Urban-rural Integration Development in the PRD Region
    XU Wenxiong, LI Biyin
       2010, 30 (5): 515-520,527.  
    Abstract2339)      PDF (973KB)(2212)      
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    Cited: Baidu(19)
    Evolution, Mechanism and Restriction of Utilizing the Conception of Urban Renewal for Famous Historical and Cultural Citie: A Case Study of the Transformation of “the Three Olds” in “Lingnan Tiandi” of Foshan
    YANG Jianbo,LI fan,HUANG Wei
    TROPICAL GEOGRAPHY    2015, 35 (2): 170-178.  
    Abstract1841)      PDF (620KB)(1617)      

    The trasformation of “the Three Olds” refers to that of the old towns, old factory buildings and old village residences. Taking “Lingnan Tiandi” in Foshan City as an example, this article discusses the evolution, mechanism and restriction of utilizing the conception of urban renewal for famous historical and cultural city. Especially more attention is paid to analysis of the utilazation, function and restricting factors of the conception in the core area transformation of historical and cultural city. The relevant conclusion of this article is based on the case study of the Ancestor Temple-Donghuali historical and cultural blocks (Lingnan Tiandi) in Foshan. It is indicated that the concept of the trsndformation of “the three olds” has been applied to the latest renewal of the old district of Foshan, which reflected the desire, imagination and cognitive disposition of the local government, and some limitation in application of the concept existed. It is considered that the mode and imagination of “the Three Olds” transformation might be a means for local government and developers to develop the city and industry, and might also be the technology for them to seek their own concerns and raise their comprehensive competitiveness. Essentially the attraction of the concept to them is the associated resources and the language for their use, interpretation and replacement, while less attention was paid to the practicability of the concept for the renewal of the historical and cultural city.

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    Review on the Coralline Algae Functions in the Development Process of Coral Reefs
    LI Yinqiang,YU Kefu,WANG Yinghui,WANG Rui
    TROPICAL GEOGRAPHY    2016, 36 (1): 19-26.   DOI: 10.13284/j.cnki.rddl.002805
    Abstract2494)      PDF (9894KB)(1771)      

    Coralline algae are common in calcified red algal groups and an essential component of coral reefs. In addition, they play an important role in the process of coral reef development: 1) Coralline algae provide calcium for building the reef body; 2) coralline algae have strong binding and gluing ability to glue the broken biological fragments together and build coral reefs that can withstand strong winds; 3) coralline algae’s hard calcareous surfaces provide rigid basements for coral larvae to attach and grow; 4) coralline algae promote energy flow in coral reef ecosystems through photosynthesis; 5) coralline algae’s high primary productivity helps to maintain the efficiency of material cycle in coral reef ecosystems. Current research on coralline algae is focused on coralline algae’s responses to environmental stresses such as global warming and ocean acidification, and on the relations between the community structure, species diversity and spatial and temporal variations of coralline algae and environment changes. Further studies will be conducive to reveal the multiple functions of coralline algae in coral reef ecosystems.

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    Formation of the Sand Spit at Dengloujiao Cape, Leizhou Peninsula
    ZHAO Huan-ting, WANG Li-rong, SONG Chao-jing
       2007, 27 (5): 405-410.  
    Abstract2275)      PDF (1605KB)(1436)      
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    Cited: Baidu(6)
    The Growth and Shrinkage of China’s Rapidly Urbanizing Areas from the Perspective of Property Rights: A Case Study of Dongguan
    Li Xun, Li Xianfeng and Deng Jiayi
    TROPICAL GEOGRAPHY    2019, 39 (1): 1-10.   DOI: 10.13284/j.cnki.rddl.003104
    Abstract826)      PDF (15123KB)(416)      

    With the spread of globalization, the phenomenon of growth and shrinkage in rapidly urbanizing areas has become an international topic in the study of regional development and transformation. Following the reform and opening up of China, rapid urbanization spread through the Pearl River Delta, promoted by external capital and cheap labor. At the same time, a large number of “Desakota” regions appeared, featuring different types of property rights. However, the financial crisis had a huge impact on urban development in 2008. The differences in the property rights of the regions meant that renewal policies followed different paths, so that a new spatial phenomenon occurred in which growth and shrinkage coexisted. In light of this, our research will start from the special conditions of regional urbanization, combined with the system of binary land property rights between city and rural areas, to explore the intrinsic features of Desakota regions in the Pearl River Delta and propose an analytical framework for understanding growth and shrinkage. The post–financial crisis era saw great differences between state-owned land and collective-owned land in their matched-degree with national industrial policies, leading to completely different development opportunities for different regions. In fact, the phenomenon of centralized and decentralized urban-rural integration (Desakota), which happened in the vast rural areas of the Pearl River Delta, was the result of the endogenous system of binary land property rights between city and rural areas. After the outbreak of the financial crisis in 2008, the Chinese government’s macro-control policies underwent major adjustments, and the country’s fiscal and industrial policies have begun to shift. State-owned land with a single property rights structure has become a key area for local renewal and transformation due to its low-cost advantage. It provides space for the entry of new industries through functional replacement and promotes regional economic transformation and development. At the same time, due to the dispersive land property and small scale, the long-term accumulation of small property collective land leads to higher transaction costs and difficulty in large-scale production activities. Consequently, transformation and renewal are difficult to achieve. The difference in regional property rights structure and difficulty of renewal has led to a new spatial pattern in which both growth and shrinkage coexist. This empirical analysis takes Dongguan as an example and tries to overcome the limitations of traditional social and economic indicators. Innovatively, it uses NPP-VIIRS nighttime lighting data to explore visually the spatial distribution characteristics of growth and shrinkage in Dongguan. Combining this case study with those of typical regions, we analyze the mechanism of different types of development inside the regions from the perspective of property rights. We find that land is the essential factor determining the direction of regional development. The growing areas of Dongguan are mainly concentrated in ports, cross-border areas, and key areas supported by national policies, which have clear property rights and a single structure. In addition, the shrinking areas often occur in mixed areas of industrial parks and urban villages, which have relatively dispersive property rights. This study provides a good sample for the development of rapidly urbanizing areas in the post-financial crisis era. Local governments should focus on the regional property rights structure in the process of decision making and should adapt to local conditions and adopt different policies to promote regional development.

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       2001, 21 (3): 237-241.  
    Abstract2051)      PDF (203KB)(1914)      
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    Cited: Baidu(1)
    Analysis of Urban Agglomeration Spatial Integration Mechanisms and Strategies in Guangxi Beibuwan Bay Economic Zone
    JIANG Yong, HUANG Hu
       2009, 29 (1): 43-47.  
    Abstract2046)      PDF (227KB)(1523)      
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    Cited: Baidu(2)
    Evolution of Tourism Development Modes and the Themed- Converged Development of Karst Landscapes
    Yuelong Wei
    Tropical Geography    2021, 41 (5): 1073-1095.   DOI: 10.13284/j.cnki.rddl.003392
    Abstract58)   HTML0)    PDF (2575KB)(182)      

    Based on landscape characteristics, regional development level, location conditions, public awareness, and management level, and others, we categorized thousands of karst landscape areas in China into four subtypes. These types include the following: famous attractions of karst tourism, classical destinations of karst tourism, new destinations of karst tourism, and new development areas of karst tourism. Then, using time as our theme, we researched the development modes of the tourism of karst landscapes in China over the past 70 years. To do so, we used inductive and analogical analysis. Our study found three main results. First, the main tourism development modes that have been introduced and that have acquired different implementation effects since 1950 are divided into nine types and thirty-eight species. Each have different respective requirements, thereby matching with different characteristics of various karst landscapes. Second, both different and the same types of karst landscape resource communities or areas often have multifarious tourism development modes. Multifarious tourism development modes have immense differences regarding the degree of importance, exploitation benefit, development tendency, among others. Conversely, the same tourism development mode may have different implementation effects, exploitation benefits, and development tendencies in the development of various karst landscape resource communities or areas. Third, we summarized two main types of development models (i.e., the characteristic and benefit-driven themeless-separated development and the characteristic and science-driven themed-converged development) and considered them to be the result of the karst tourism in special phases of development. The characteristic and benefit-driven themeless-separated development has played an important role in the development and prosperity of karst tourism. The characteristic and science-driven themed-converged development is a new development model comprising the resource community, scientific research, development, protection, management, and feedback, and would be the main trend of karst tourism development under the new situations. Finally, we explored the basic flow of the themed-converged development by using the system dynamics method. For this system dynamics method, resource community and its characteristics are its intrinsic motivation, scientific research is its outside motivation, protection, management, research(the anaphase),feedback, and so on are its operation systems which are derived from the motivation with theme as the soul.

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    Discovery and Scientific Significance of Qixinggang Relics of Ancient Coast,Guangzhou
    ZHAO Huanting
    TROPICAL GEOGRAPHY    2017, 37 (4): 610-619.   DOI: 10.13284/j.cnki.rddl.002972
    Abstract2140)      PDF (13222KB)(739)      

    It is discussed in this paper about the discovery and report of coastal erosion landform in Qixinggang and barrier-lagoon system landform in Songgang of the southeastern suburb of Guangzhou by Wu Shangshi in 1937. Wu Shangshi is proved to be the first discoverer of ancient coastal landform in the Pearl River (Zhujiang) Estuary and Delta area, which formed in the middle Holocene while global sea-level rising and Guizhou transgression in Pearl River Estuary in 8-2 ka BP. The discovery has important scientific significance and shows that the research capacity of Chinese scholars can rival the contemporary foreign counterparts. The discovery supports the existence of Pearl River Delta and provides evidences in kind for the record of the evolution of the Pearl River Estuary in Chinese ancient books, while playing a major role in teaching practice, scientific research, public knowledge popularization and social-culture education in past decades. Several generations of geological, geographical and marine talents benefited from Qixinggang relics of ancient coast. The discussion and study of the erosion landform of Qixinggang promotes the development of geomorphology, Quaternary geology, paleooceanography, paleogeography, estuarine and coastal research in Guangzhou area and global change study. There is more achievement and talents in the formation and development of Pearl River Delta, which devoted in the regulation of Pearl River Estuary Delta. Qixinggang relics of ancient coast were listed as city-level key historical relic by Guangzhou government in 1956 and monument was set up there by Guangdong Geographical Society in 1983. The scientific park of Qixinggang relics of ancient coast is being built, while the first stage project has been commissioned and sculpture of Wu Shangshi has been unveiled. All of those would be good for the efficient protection and teaching and researching of Qixinggang relics of ancient coastal landform. We should learn from Wu Shangshi with his scientific innovation spirit of emphasizing on field-study, seeking truth from the facts, no superstitions, no blind obedience, bold exploration, and hard writing.

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    Luo Zhangren
       1987, 7 (1): 65-75.  
    Abstract983)      PDF (3102KB)(933)      
    The outline and the strike of the recent coastline in Ilainan Island have a close relationship with the geologic structure. The origin and development of recent coastal landforms was effected deeply by the rise of sea level since post-glacial period. Besides, the factors of the dynamics, sediment and regional geology also controied the development of recent coastal landforms as it should be.
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       2004, 24 (3): 293-297.  
    Abstract1998)      PDF (353KB)(2069)      
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    Cited: Baidu(1)