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    30 April 1993, Volume 13 Issue 1 Previous Issue    Next Issue
    COMPARISON OF THE PALEODUNE FORMED DURING THE LATE PLEISTOCENE BETWEEN CHINA AND JAPAN
    Huang Zhenguo
    1993, 13 (1):  1-12. 
    Abstract ( )   PDF (866KB) ( )   Save

    Paleodunes formed during the late Pleistocene are called the Old red sand in China.They are distributed extensively along the coast of Japan Sea in Japan and along the coast of South China.The dune areas are divided into two types,the calcareous sand and the non—calcareoussand,of which the latter is more common.A paleodune in Japan generally contains four paleosoils which divide the dune sand into four parts.The four major periods of dune formation are as follows: 20 000 a B.P.,30 000 a B.P.,50 000 a B.P.and 70 000 a B.P..But only the former three periods have been found in China.According to the distribution,elevation and scale,grain size,chemical characters,depositional structure and stratigraphic sequence,it is recognized that the origin of paleodune or Old red sand is mainly eolian.The paleodunes developed mainly as a result of cold and dry climate during the last glacial age.The depositional sequence of paleodunes and paleosoils shows at least four cycles of environment change and every cycle consists of subglacial-low sea level-paleodune and subinterglacial-high sea levelpaleosoil during the last glacial age.The Old red sand in China is characterized by its red or orange color,while the paleodunes in some areas of Japan has red or brownish red weathering layer with a thickness of 1-2m.It seems that there was a certain relationship between the red soil action and the warm paleoclimate during the sub interglacial.

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    DEVELOPMENT AND MANAGEMENT OF GUANGDONG MOUNTAINOUS REGION
    Liang Guozhao
    1993, 13 (1):  13-22. 
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    Consisting of 49 mountain counties,with its 25.47 million people in an area of 115400 km2,the mountainous region of Guangdong is rich in natural resources,and has conspicuously developed after reforms and opening to the outside world,but has stilllagged far behind the Zhujiang Delta.The author considers that it will take decades to reduce the economic gap between the relatively developed coastal zones and the underdeveloped highland areas.In this paper suggestions have been made on the strategy of growth axes and points,the rational exploitation of the wide-spread mountain and hillslopes while making better use of the existing cultivated land,the construction of the threeindustrial corridors,the improvement of communication and transportation facilities and the protection and management of environment of the the mountainous region.

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    IDEAS ON ESTABLISHMENT OF THE SCIENCE AND TECHNOLOGY GARDEN OF THREE-HIGH AGRICULTURE IN GUANGDONG PROVINCE
    Zhang Jian, Zhang Hongou, Li Yun, Luo Guofeng
    1993, 13 (1):  23-28. 
    Abstract ( )   PDF (431KB) ( )   Save

    According to the requirement of economic development in Guangdong,it is neces-sary to establish science and technology gardens of three-high (high output,high quality and high ity and high benefit) agriculture so as to enhance the agriculture development of the province.The garden should be an integrated enterprise with functions of production,applied technology study and demonstration.A local government,cooperating with research institutes should be the major organizer.The basic principle of the garden is to develop technology intensive production and applied technology study on the base of local conditions.market demand and the mechanism of ecological economics.It wouldconsist of three sections:central district,intermediate experiment district and demostration district.The garden should be developed step by step under an overall plan including suitable site sellection,rational layout,and effective management system.Some favourable policies should be given to the garden so as to accelerate its development.Qiaotou,a town in the north-east of Dongguan Municipality is suggested to be an ideal site for construction of the garden.

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    FACTORS AND MECHANISM OF THE URBANIZATION PROCESS IN COASTAL OPEN AREA OF CHINA—A CASE STUDY OF FUJIAN COASTAL CITIES
    Hou Xiaohong, Liu Ta
    1993, 13 (1):  29-34. 
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    Taking coastal open area of Fujian as an example,three major factors of urbanization and urban development-institutions and policies of planned economy,township en-erprises and export-oriented economy,are analysed.(1)Of those institutions andpolicies,the central planned institution,industrial administration and population policies do main effects on the development of urban economy and the improvement of urbanization.(2) Township enterprises absorb lots of surplus labour force and speed up the change of rural industrial structure and labour force constitution,and increase the growth of towns and counties on the basis of extensive of non-agricultural tendency.(3) The export-oriented economy not only improves urban infrastructure and invest environment and changes urban economic state,but also speed up the process of urbanization by technology,funds and market structure.

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    ECONOMIC-TRADE PRINCIPLES FOR THE METROPOLIS AND THEORY OF THE SPATIAL ECONOMIC DEVELOPMENT
    Wang Xingzhong
    1993, 13 (1):  35-40. 
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    Introducing the theory of the spatial economic development abroad,the author points out that the laws of economic elements in the regional economic development have been overlooked in China.According to the spatial principles of the city economy abroad,the author considers that the big cities in the coastal economic open areas of China should be developed progressmely to transactional cities with economictrademechanism.

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    A STUDY ON THE ECONOMIC DEVELOPMENT IN CHANGZHOU TOWN OF GUANGZHOU
    Yu Guoyang
    1993, 13 (1):  41-47. 
    Abstract ( )   PDF (547KB) ( )   Save

    From the appraisal of the resources of land,sunlight,heat,water,living beings,tourism,and the social and economic bases,it is considered that the tourism resources are superior in Changzhou Town of Guangzhou,which are characterized by better composition,distinctive features,great celebrity and vast influence scope,such as famous Huangpu Military Academy,Couper Dock,as well as rural scenery of South China.The economic development in Changzhou Town should be supported by the development of the superior resources.On the basis of exploitation of the tourism resources,three major economic sectors,including tourism,tourism agriculture and tourism manufacture which are connected and promoted with each other,could be established,forming an economic system with close struture.

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    OPTIMIZED PROGRAM OF PROPORTIONAL SUPPLY OF VEGETABLES TO GUANGZHOU
    Liu Jinluan, Tu Yuexian, Chen Xinguang
    1993, 13 (1):  48-56. 
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    From the influence of meteorological factors on the vegetable supply and the market demand,an optimized program of vegetable production and supply is made by using a multi-object model.Five objects are defined in the model:the minimum difference between market supply and demand;fewer vegetable-growing areas;rational use of invers season vegetable-growing areas;better benifits of producers andsuitable prices forconsumers.The model programs respectively the vegetable supply in off seasons (from March to April and from August to September) and peak periods (from May to July and October to February) in Gunagzhou City.The results of the optimized program has basically achieved the five predetermined objects.

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    A QUANTITATIVE CLASSIFICATION OF THE LAND TYPES IN DONGGUAN MUNICIPALITY OF GUANGDONG PROVINCE
    Weng Qihao
    1993, 13 (1):  57-63. 
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    Based on 10 indexes,i.e.altitude,relative height,surface slope,dissected density,soil organic matter content,soil phosphorus value,soil clays content,soil pH value,active accumulated temperature and mean annual precipitation,by means of principal component analysis and cluster analysis,the land types of Dongguan Municipality are classified into five systems:A.plains,B.terraces,C.hills,D.low mountains,E.waters.Thev are also further sub-divided into 16 units and 30 sub-units.

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    DOUBLE—TAP CONTROL MECHANISM:A THEORETICAL MODEL FOR THE RELEASE OF ALUMINIUM IN SOILS
    Liu Hongjie
    1993, 13 (1):  64-69. 
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    There are two taps controlling the release process of aluminium in soils: the hydrolysis of aluminium hydroxides and the coagulation of soluble aluminium With soil colloid.The responsibility of soluble aluminium to pH has two turning points.The soluble aluminium responds strongly to the change of pH when soil ph>4.5,which is the first tap of the controller.Its responsibility becomes very weak when soil pH<4.5,which is the second tap of the controller.However,the responsibility slightly increased when pH<4.0.

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    RATIONAL EXPLOITATION OF RIVER SAND RESOURCES AND ENVIONMENTAL PROTECTION IN THE NANDU RIVER-MOUTH AREA OF HAINAN ISLAND
    Luo Xianlin, Luo Zhangren, Wu Chaoyu
    1993, 13 (1):  70-76. 
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    Some environmental problems have emerged because of the excavation of the bed load in the Nandu River-mouth area.The statistic deposits of river sand resources in the area are about 1.3×107m3,including the four types: the bed sand,the shoal sand,the river island sand and the dry land sand.In the deposits,however,it is only a volume of 400 000—600 000 m3/a that can take part in the modern river process.At present,the excavated volume of sand (1 million m3/a) has exceeded the above volume.The cut-down rate of the river bed (0.05—0.15m/a),the erosion of the bank and the westward shift of the channel have been accelerated by the human action.Some suggestions are made for the rational exploitation of river sand resources and for environmental protection.Moreover,combining with the river management,an engineering plan of excavating sands and building a dam in the southeast of Xinbu bridge is presented.

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    PREDICTIVE EFFECTS OF SHUIKOU HYDRO-POWER STATION ON THE NAVIGATION OF THE MINJIANG RIVER
    Lin Qidong, Chen Huiyan
    1993, 13 (1):  77-82. 
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    Shuikou Hydr-power Station,having 1.40 million kW of installed capacity,is located in the middle reaches of the Minjiang River.The station will be completed in May 1993,and then the water level behind the dam will be raised by 58 m,the river width will be as 5-10 times as it is,132 rapids will be submerged,thus,more than 90 km shallow channel within the reservior will be changed into deep and shorter navigation channel.The increases of the discharge and the river depth below the dam during lowwater level period will also do good for navigation.On the other hand,however,some problems will come out,such as reservior deposition,dewatered area within the back water reach,and the higher swell rate pertaining to navigation below the dam,whichcould be solved by adopting some measures.

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    DYNAMIC CHARACTERISTICS AND REALIGNMENT OF THE SANYA RIVER ESTUARY
    Qiao Pengnian, Zheng Feng, Zhang Zhenqiu, Chen Shangqun
    1993, 13 (1):  83-91. 
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    The Sanya River,coming from mountainous areas in the north of Sanya City in Hainan Island,is characterized by its marked variation.in discharge and sharp fluctuation of water level.The tidal inlet keeps stable under the modern hydraulic conditions of the Sanya River estuary which is in an environment of weak tide and wave action.The result of hydralic calculation shows that tidal action weakens along the way from the rivermouth to upper reaches.The dikes of Sanya City can meet the demand of controlling the flood that occurs in the year of 50 years.However,the three tributaries of the Sanya River are low and their bank is often inundated by floods,which should be renovated before being used as construction land.A comprehensive realignment plan is put forward as follows:firstly,reinforce the flood control dikes and extend the width of the Jinjiling river course;Secondly,dredge the river bed at lower reaches and make rational use of the estuary area,finally,harness the tributaries and keep in advance courses for passing flood.

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    EXPLOITATION OF NATURAL TOURISM RESOURCES IN MACAO
    Zhu Ying
    1993, 13 (1):  92-97. 
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    Macao is rich in natural tourism resources,such as granite hill landscapes,stone-eggs,rocks of various shapes,caves,coastal sandy beaches and mangroves etc..The black sandy beach especially is of tourst significance and healthy effect.Four proposals for exploiting natural tourism resources of the area are put forward:(1)Combine the tourism resources of hills and sea,and put stress on the development of "Hac Sa Wan"(the black sandy beach).(2) Combine the resources of natural landscapes and human landscapes.(3) Combine the natural landscape tourism with the gambling tourism and shopping tourism.(4) Pay attention to the relationship between the tourism resources in Macao and its neighbouring areas constituting several golden trigons for tourism:Macao,Hong Kong and Guangzhou City;Macao,Hong Kong and GuangdongProvince;or Macao and Hong Kong,Taiwan Province,and mainland China.

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