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  • 1997 Volume 17 Issue 3
    Published: 20 May 1997
      

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  • He Canfei, Chen Ying
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    Foreign direct investments(or FDIs) have been employed since the early 1980s.and they have become more and more important in Chinese economic development.However,the roles of FDIs are very different between regions,partly due to the different locational preference of various source countries.Some facts show that FDIs from Hongkong-Macao indicate a strong locational preference.Therefore,this paper attempts to make an empirical research on the locational preference of Hongkong-Macao’FDIs and their spatial diffusion under the support of statistical data with regression analysis.In this paper,three statistical models,including the special location model,the general location model and the spatial diffusion model,are created.The results show that this kind of analysis is successful.The major conclusions are as follows:1.The optimum location for FDIs from Hongkong-Macao lies in the coastal area,especially Guangdong,Hainan,Jiangsu,Shandong,Fujian provinces.Besides,Hubei Province in the middle area is also an important region.2.The FDIs from Hongkong-Macao in China have diffused gradually from the coastal provinces to the inland regions,the northern and the metropolis and from the locations that had attracted investment to their vicinities since the 1990s.3.The special locational factors,such as the border location,the unique social and cultural ties are the key factors determining the special locational distribution.4.The general location and spatial diffusion of Hongkong-Macao’s FDIs are the results of interplay of several economic factors.They are the economic scale and advantage,the growth rate,the labor force and economic extroversion.The author believes that it is only a preliminary analysis and further research becomes very necessary in the near future.
  • Xu Jiongxin
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    The earth surface sediment transport is composed of two parts:the transport of non-soluble debris and that of dissolved solids,which are the results of mechanical and chemical denudations.Accordingly,the following index is proposed to describe the composition of total sediment transfer:I=Dc/Dt=Dc/(Dc+Dm) where Dc and Dm are surface sediment transfer due to chemical and mechanical denudations,respectively,Dt is total surface sediment transfer.This index is found to be closely related to zonal natural factors such as precipitation,temperature and vegetation.The Dc/Dt value increases with mean annual precipitation and runoff,and decreases with drainage basin dryness index.In the monsoon influenced eastern China,from south to north,this index decreases rapidly,reaching a minimum,and then increases.This areal variation may be explained by the relation between the chemical and mechanical denudations in different natural zones,which in its turn is controlled by the specific combination of climate and vegetation in each zone.The forest cover in the eastern China is found to vary latitudinally in the same way as the index Dc/Dt,indicating that vegetation is an important factor controlling the relation between chemical and mechanical denudations.
  • Pan Xianjun, Hu Baoqing
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    The classification and evaluation of regional natural resourus are very important to exploit and supervise natural resources.Classification is the former work of the evaluation.Taking the natural resouras of Dalian City as an example,the authors discuss the method for classifying natural resources.
  • Wang Xinsheng, Jiang Youhua
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    The rationing evaluation of the economic object’s status is very important in urban planning,regional planning and social economic developing planning.It is the main content of this paper to apply the theory of gravitational field to evaluating the status of the economic object.We can have the aicd of the“gravitational potential energy”concept for it.The status of some economic object is not only related to its own influence,but also the influences of other economic objects,and the status of some economic object includes two parts:one is“potential energy”that this economic object has at the sites of others;the other is“potential energy”that others have at its site.
  • Wang Xingzhong
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    The paper,pointed out the relationship between developing the tourism resources and the region travel.There exist different theories and methodological patterns in tourism resource development in China: 1) recognition pattern of developing the“little-region travel”and 2) recognition pattern of developing the“big-region travel”,which cause different development results and effects in the tourism areas.According to the principle of sustainable development of travel,a multielement trend analysis tourism development and a“big-region tranel”structure system should be established,and some patterns and theories about developing the region travel are pointed out: 1) the pattern of developing the“big-region travel”;2) the principle about developing the region travel of China in a decade of a century etc.
  • Liu Jisheng, Chen Tao
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    The studies on man-land relationship will not only contribute to unifying geographical theory by getting rid of dualism,but also are great practical value to solving problems on environment,resources,population,and so on.Being based upon the idea of systematic self-organization,the papar advances a new point of view of man-land relationship with non-determinity.The non-linear interaction between man and land is analysed dynamically by means of logistic map which can reflect relationship between a system and its environment.After discussing the chaotic course in the interaction,the authors point out the multifractal nature of man-land relationship.The conclusion is that fractal structure is a good structure of nautre,and chaotic course often leads to this kind of structure.The chaotic course is the very cause which results in human fractal landscape on the surface of the earth.
  • Wu Kai
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    The region surrounded by the Bohai Sea includes 31 counties,cities and districts of Tianjin City,Hebei Province and Shandong Province.The status quo of the water environment problems in the region,such as running out of flow in the Huanghe River,water contamination in the rivers,funnel of groundwater and earth subsidence,invasion of seawater,fluorine poisonning in drinking water and abnormal content of iodine in groundwater and so on,were briefly analyzed in this paper,in which running out of flow in the Huanghe River has the tendency of occurring more frequent,longer and more early.In view of the problems as said above,the preventing and controlling countermeasures for the water environment were suggested,which are available for reference by the policy-making departments concerned.
  • Gan Jianmin, Xue Jingyi, Xie Shouchang
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    The concentration,migration and stagnation of nutrient in soil percolating water in 10 cm,25 cm,45 cm and 65 cm soil layers in the evergreen broad-leaved forest of the Ailao Mountains in Yunnan Province were analysed and observed on the basis of the data collected during 1991-1993.The results are useful for recognizing the nutrient change law of soil percolating water in southwest monsoon area,subtropical montane forests manegment,rational exploitation and protection of soil source,and enhancement of productivity.
  • Xiong Heigang, Liu Gengnian, Cui Zhijiu, Song Changqing
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    Debris flow is one of the most serious natural hazards in Tianshan Mountains.According to trigger agent,the debris flows can be divided into storm type which is caused by strom flood,and glacial type which is caused by flood from melting of snow and glacier in hot weather.At present,debris flow causes damage mainly to transportation,sometimes to mining and residents in the mountainous area.The catastrophic process and the forming condition of the debris flow show regional regularity,therefore,the research of its distribution,processes,and environmental condition is useful in mitigating the natural hazard.
  • Li Youli, Yang Jingchun
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    The Shiyang River,Heihe River,Beida River and Shule River developed 2 Holocene terraces each in the plain area of the Hexi Corridor.Based on 14C ages from the sediments on the terraces,it is discovered that the lower terraces were formed between 5.57 ka B.P.and 3.15 ka B.P.,the higher terraces were formed between 11 ka B.P.and 8 ka B.P.,and that there was downcutting perod of the rivers from 8 ka B.P.to 6 ka B.P.Comparing the alluvial terraces with the climatic changes in the Holocene,it is concluded that the downcutting period was coincident with the stable warmer and wetter climate,and the aggradation took place when the climate was changing either from drier to wetter or from wetter to drier.
  • Zhu Cheng, Yu Shiyong, Zhang Bing, Zhao Ningxi, Yan Su’ning, Wang Junyu, Ren Lixiu
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    Analyses of sporo pollen,granularity,scanning electron microscope,geochemical and chronology for sediment and buried paleo trees reveal that at least the large mountain floods had ever occurred in 6588?192 a B.P.,5720?80 a B.P.and 5410?120 a B.P.-5145?84 a B.P.during the climatic optimum of the Holocene in this area.At that time,the natural landscape there was mainly subtropic coniferous broad mixed forest.The gray-yellow silt and yellow-brown silty clay layer with thickness of 1.1 m in Hepingchong profile was formed by dust transport and accumulation during the cold period (1000 BC-850 BC) in Subboreal Phase.However,the upper brown yellow sandy silt layer in the profile of the area was formed by alluvial flat facies deposits during the warm-humid environment of Subatlantic Phase(2450-1980 a BP).The several large floods occurred in the climatic optimum of the Holocene there were perhaps concerned in short oscillation and abnormal event between climate and sea surface.
  • Li Qusheng, Qiu Shanwen
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    The sandy land resource in Songnen Plain is one kind of important reserve land resources.Comparing to other sandy land in China,its exploiting conditions are relatively better through decades management.The sandy land exploitation has been put on the order of the day with the westward movement of the focal point of agricultural development in Songnen Plain.According to the relationships between the history of sandy land reclamation and the changes of the sandy land desertification,and the current problems in sandy land utilization,the key of sandy land exploitation is to build a high beneficial and stable man-controlled eco-system,which not only conforms to the desertification laws but also could meet the demand of human economic development.The study shows that very obvious economic,social and ecological benefits have been obtained through comprehensive exploitation of sandy land using sandy land ecological engineering techniques,sandy land agricultural engineering techniques and sandyland irrigation techniques.These techniques are worthy of spreading.
  • Liu Xiangnan, Huang Fang
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    The integration of remote sensing and geographical information system technology is an optimal method for maize yield estimation.In this study,a county agricultural information system has been established,which supports various data capture,information complex and spatial analysis.Based on the system,maize yield estimation mechanism is explored with remote sensing,whereby maize yield factors can be derived from remote sensing indices.Some relative models between vegetation index (PVI,RVI,NDCI,WDVI,TSAVI,etc.) and Leaf Area Index (LAI),chlorophyll concentration and biomass are developed.Crop Water Stress Index (CWSI) is calculated to indicate the stress of maize growing conditions.Therefore,with the aid of the system,PVI,NDCI and CWSI,which respectively stand for maize biological parameters and imitate its ecological environment,are two categories index in a comprehensive yield estimation model.Then,considering the difference of maize growing environment in Lishu county,not only three yield classes of maize are determined but also three yield estimation models for each class are developed.Moreover,yield estimation models for each maize growing stage are discussed in this paper.
  • Zhou Yunjun, Zhou Lihua
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    Qinghai Lake is located in the northeastern Qinghai Xizang (Tibet) Plateau.It is a special big light saltwater lake.Paludification meadow in Qinghai Lake drainage area is an eco-system affected by the eco-environment factors.Paludification meadow in Qinghai Lake drainage area have obvious wetland habit features,is the component of Qinghai Lake wetland.Its formation,development,and spatial and temporal distribution are governed by a few main meteorological factors in the eco-environment to a certain extent.The main meteorological factors are ≥10℃ accumulated temperature,precipitation from May to September and annual humidity coefficient.The mathematical model of the mire wetland rate and the main meteorological factors are given by multivariate linear regression in the paper.
  • Deng Wei
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    Aiming at the potential crises of water resources confronted by the regional development,the paper studies the formation of the island water resources and the ways of rational development by analysing the fundamental characteristics of islands water environment.The geological and geographical environment and regional climate condition peculiar to the islands determine that the water environment capacity is small,with limited water resources.The regional exploitation of islands should follow the way of sustainable and coordinated development.In order to exploit water resources we can not damage the water environment,must seek a pattern of sustainable utilization of water resources.
  • Luo Chengde
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    The Mt. Ma’an(4288m) is the highest mountain in the southwest edge of Sichuan Basin (102°55’E,28°58’N).There are Quaternary glacial landforms on this mountain.It is a typical example of fossil glacial landforms in the east China.Its glacial stages are the last glaciation (Q33) and the neoglaciation (Q43).