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  • 1992 Volume 12 Issue 1
    Published: 30 January 1992
      

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  • Zhang Leyu
    1992, 12(1): 1-8.
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    The urban functions of Guangzhou and Hong Kong have undergone long-term changes.In ancient China, with the expansion of Central Plains economy and technology towards South China,Guangzhou flourished in economy, 2000 years ahead of Hong Kong.In modern history, however, with western world's economic expansion to the east, Hong Kong became the centre of international trade, shipping, finace,tourism and information,with its urban population and economic power greatly surpassing Guangzhou.From early 1950 s to late 1970 s,Guangzhou was under highly-centralized planned economy and product economic pattern.Then it began to carry our Open-door and Reform policy which has quickened its economic development and consequently strengthened its position and function as the economic centre of South China.Now Guangzhou is playing a pivotal role in both internal and external trade and economic development.The developing tendency of the two cities' urban functions are also discussed in this paper. Firstly,although both Guangzhou and Hong Kong are comprehensive and multi-functional cities,Hong Kong is mainly dealing with countries and districts outside China.Whereas Guangzhou is chiefly connected with South China area. Secondly,compared to Guangzhou,Hong Kong is at a higher developing stage,but both cities would promote their tertiary industry's proportion in the whole industrial structure. Thirdly, on the one hand, Hong Kong enjoys well-developed light industry, advanced management and applied technology,as well as a large capital and widely-spread international marketing channels. On the other hand,it is short of labour force, natural resources and industrial territory, its conditions for developing basic Industry are not as good as those in Guangzhou.With their respective advantages and disadvantages,Hong Kong and GuangZhou should enhance their cooperation, promote their economic prosperity and give an impetus to the economic development of South China.
  • Chen Xianghong, Zhong Xinji
    1992, 12(1): 9-14.
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    In 1990 there were 37.93 million mu (1mu=1/15ha.) of cultivated land in Guangdong, only 0.61 mu per capita, ranking second from the end in China. The variation of cultivated land over the past 40 years is stated in this paper. It is estimated that the cultivated land in the province will reduce by about 1.2 million mu by the year of 2000, in which 500000 mu for urban and rural residential areas,300000 mu for traffic road, 50000 mu for factories and mines, 150000 mu for irrigation works and reservoirs, and 200000 mu for the structure regulation of agriculture. In compensation for the loss of cultivated land, 1.3 million mu of waste land and beach should be reclaimed by 2000. The authors propose some countermeasures in this paper.
  • Huang Daji
    1992, 12(1): 15-22.
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    Based on the 34 comprehensive indexes of the Dongjiang River Basin, by means of principal component analysis, cluster analysis and discriminatory analysis,the 14 counties (cities) in the basin were divided into 3 regions:Southern Region consisting of Dongguan and Bao-an; Central Region consisting of the 5 counties(cities)-Zeng-cheng,Huicheng, Huiyang, Boluo and Huidong;Northern Region consisting of the 7 counties (cities)-Longmen,Heyuan, Zijin, Longchuan, Heping, Lianping and Xinfeng. The result tallies with the actual situation of the Dongjiang River Basin.
  • Wen Peiling, Li Pingri
    1992, 12(1): 23-29.
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    According to the analysis of Quaternary sediment minerals of sea-land facies and sea-wind facies in the Coast of South China,it is considered that mineral analysis is an effective way on distinguishing Quaternary sediment facies,arid its conclusion is basically identical with that from the analysis of micropalaeontology, macropalaeontology, trace element and size.
  • Hu Zhenglin
    1992, 12(1): 30-38.
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    Based on the data of meteorological observation in three types of streets in Guangzhou City, the shapes and formation conditions of vertical vortexes are analysed,and their vertical velocity are computed by using an empirical formula. It is found that the ratio of height and width of the street canyon and the cross-street component of roof wind velocity are the most important factors for the formation of the vertical vortex in the street canyon. The larger the ratio of height and width of street canyon and the cross-street component of roof velocity are,the easier the vertical vortex in the street canyon will form. When the ratio of height and width of a street canyon is larger than 0.5 and the cross-street component of roof wind velocity is larger than 0.7m/s,there is often a vertical vortex in the street canyon, and its average vertical velocity increases as the roof wind velocity enlarges,When the cross-street component of roof wind velocity is 2m/s,the average vertical velocity of the vortex is 3.7cm/s,and the vertical velocity will increase about 3cm/s for every 2 m/s increase of the cross-street component of roof wind velocity.
  • He Yashou, Gu Yaojin
    1992, 12(1): 39-44.
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    The pollution of water environment in different areas of Maoming is described. As the results of the pollution,aquatic animals are destroyed;the health of people and domestic animals are impaired;agricultural production suffers losses;water for living use is in short supply. According to the pollution conditions of the city, the authors propose the following measures to control the pollution of water environment: (1)economize on water use and reducethe pollutants;(2)build a united sewage treatment pant;(3) harness the Xiaodongjiang River;(4) dredge discharge ditches of sewage and build dikes for preventing sewage (5) set up an environment monitor network;(6) supply clean water for the people in the polluted areas.
  • Zeng Congsheng
    1992, 12(1): 45-52.
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    The lower reaches of the Minjiang River is an area of frequently-occurring flood and waterlogging in Fujian Province. According to incomplete statistics, in average there was 1 flood-damage year in every 4.4 years during the 150 years from 1834 to 1984.The floods took place mainly in the months from June to September, and the highest flood frequency was in July. The distribution of flood damages in history in the area and their formation are explored in this paper. The effects of future global sea level rise on flood control are discussed.Some countermeasures to lighten future flood damages in the area are put forward as follows:(1) To reinforce the existing flood control dykes. (2) To raise the base level of new building in lowland areas. (3) To control soil erosion an upper reaches of the river, and to remove the obstacles in the river course of the lower reaches.(4) To strengthen the system of flood forecast and heighten the people's consciousness of preventing disaster.
  • Li Jingbao
    1992, 12(1): 53-59.
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    From the viewpoint of environmental science, the main environment problems in Xiangjiang River Basin, such as decrease of the percentage of forest cover, aggravation of soil erosion,degradation of land resource,serious water and soil pollution by heavy metals in some river sections and mining areas, and serious atmosphere pollulion by SOS and other materials,are analysed in this paper. The author proposes the environmental renovation objectives and focus in the Xiangjiang River Basin before 2010. Based on the differences of environmental quality and resource advantages, the basin is divided into 4 regions and 2 sections of development-renovation. Measures to improve the environment are put forward.
  • Huang Youtai, Lin Shaolong
    1992, 12(1): 60-64.
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    From the analysis of the experiments of developing sericulture in Hainan Island, it is considered that the geographical position,climate and labour conditions of Hainan are suitable for development of sericulture,from which high output and good quality of mulberry and silkworm as well as remarkable economic benefit can be achieved. The authors advance some suggestions as follows:work out a feasible development p1 an;build up a examplary base;do rational distribution of sericulture;make full use of foreign capital and technique.
  • Wang Jun, Jiang Haisheng, Fen Min
    1992, 12(1): 65-70.
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    Rhesus monkey (Macaca mulatta) is an endangered species that has been listed as class Ⅱ of protected animals in China. From the investigation and observation the spot,it is discovered that the distribution of rhesus monkey population in Wuling Mountain Area of north-western Hunan is maily at Badagongshan, Wulixi, Renchaoxi, Hongyan,Wulingyuan Tourist Area, Mengdonghe,Xiaoxi and Pailiao. There are 1400 to 1700 monkeys in 32 groups in Wulingyuan and Mengdonghe. The habitat of the animals can he divided into three kinds:quartz sandstone mountain,calcareous stone mountain, and sedimentary rock and sediment-metamorphic rock middle mountain area.The monkey groups act and forage in the period from 7 a. m.to 18 p.m. every day,in which 7.46±0.90 hours are for their action and foraging and 3.54±0.90 hours for rest. The monkey groups are ranged in size from 19 to 55 with mean of 31±13, and each group consists of 15.1±4.1% adult males and 39.2±12.4% adult females.The ratio of adults is 1 male to 3 females. The birth rate of the population and death rate of the infants are 26.7-86.7% and 0-33.3% respectively. The authors consider that it is necessary to make a development plan for the monkeys,enlarge the area of natural reserve, and improve the management of rhesus monkey and other wildlife.
  • Li Cui-e, He Linfu
    1992, 12(1): 71-76.
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    The influences of light,heat, water and soil on the growth and quality of Junshan Tea are analysed in this paper. Some measures for further development of Junshan Tea are proposed as follows:(1)develop the production of famous tea in combination with the tourism industry.(2)give the first place to Junshan Silver Needle Tea and remould the old tea-farms gradully.(3) apply more organic fertilizer for improving the tea quality.(4) combine producing and marketing.departments, and develop tea sale business for tourism. (5) enhance afforestation around the tea-farms.
  • Zeng Lingfeng
    1992, 12(1): 77-82.
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    The ecological environments of the limestone areas in Guangxi are fragile. The areas are rugged and rough, deficient in surface soil and water, but plentiful in sunlight, heat energy and rainfall,as well as in minerals and tourism resources.The advantage and disadvantage in the areas are analysed in this paper. Some measures for development of the areas are put foreward as follows:raise the scientific and technological level of the people; make comprehensive exploitation of water resources; build progressively stereoagriculture suitable to local conditions;develop township and village enterprises and diversify the economy.
  • Mo Yongkai
    1992, 12(1): 83-90.
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    Guangxi Limestone Hilly areas are rich in plant resources.But soil erosion, low percentage of plant cover and degradation of ecological environment have limited the development of forestry in the areas.The strategic measures for forestry development are put forward:to preserve hillsides for reafforestation and make the limestone hills green,and improve the ecological environment.