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  • 1999 Volume 19 Issue 2
    Published: 20 March 1999
      

    论文

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  • Deng Wei, He Yan
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    Water is indispensable material base on which society depends to develop. Mankind has exerted huge pressure on the resource and environment of the earth by themselves explosive population increasing in about one hundred years. On the one hand, mankind itself is consuming huge water resources, on the other hand, mankind has being gived out enormous contaminants into environment, which have resulted into the obvious water environment worsen such as the gradually decreasing fresh water resource, the aggravating contradictory between providing and need of fresh water resource. Furthermore, the climate changes of earth have brought about new problems how to use fresh water resource. China is one of the countries that have poor fresh water resource; moreover, China has huge population, which have led to considerably serious problems of water environment and development of water resource. So we have to search the sustainable way of water resource development and control and manage strictly the development of water resource according to our national conditions, which will provide the necessary guarantee of water resource for sustainable development of our nation.
  • Gong Daoyi
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    This paper analyzed the characteristics of surface temperature and precipitation changing over the Antarctic region in the past two decades based on the NCEP-NCAR reanalysis data. Under the background of global warming, the temperature of Antarctic region increases in winter, spring and autumn, but the summer temperature tends to drop. The annual temperature also increases. The strongest warming occurs in winter. Antarctic precipitation of all four seasons in increasing. The variation of temperature and precipitation has different features in different areas. Evidence shows that the atmospheric circulation may play an important role in making the difference between places. Annual average AOI correlated to surface temperature and precipitation of Antarctica is -0.55 and -0.31 respectively, and the temperature to precipitation is 0.57. These facts show that in annual time scale the variation of surface air temperature and precipitation are both affected, or controlled, by the AOI. But, all AOI, temperature and precipitation have the same uprward trend, especially the trend of AOI and precipitation is pronounced. One feasible explanation is that under the background of global warming, Antarctic temperature is also increasing, higher temperature means more moisture in air, then increasing precipitation can be expected. Many general circulation models also suggest that precipitation amounts in polar latitudes will increase under the double CO 2 scenarios, especially in Antarctic region.
  • Wu Qiyan, Ren Dongming
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    In this paper, authors throw light on the elementary prosperity of the re-organization of Chinese metropolitan area since open-door policy. They point out that formerly geographical distribution will last a long term, while a few of front cities which found on high-technological sectors have turn better steadily. At last, they analyze the regional features and existing problems of metropolitan Nanjing, then propose some suggestions.
  • Chen Yanguang, Liu Jisheng
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    According to the central place theory,urban systems under ideal conditions appear in the form of triangular lattice,which suggests that the transport network around a central city maybe possesses some characteristics of di electric breakdown model (DBM).It was presented in the paper that transport networks are Laplacian fractals after the authors’ comparing some networks of communication lines of China with DBM in respects of morphology and fractal dimensions.The spread mechanism of a transport network is very similar to that of DBM,and the mean of the fractal dimension values of real transport network is about 1.7,which approximates that of DBM in the Laplacian field of two-dimension.So,one of the important conclusions is that we can simulate and then optimize networks of communication lines by means of suitable di electric breakdown model and computers.
  • Wang Nai’ang, Li Jijun, Cao Jixiu, Cai Weimin
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    A preliminary study on the advance and the retreat of Qingtu Lake and its climatic records of the Holocene lacustrine deposits has been made through comprehensive analysis. Based on the study on the lacustrine sedimentary color, grain size, Fe3+/Fe2+ and organic matter, the authors put foward that a warm period existed during the phase of 355-480 A.D in the studied area. This warm period could be further testfied by a lot of evidence obtained from the historical documents and the natural records of Qinghai Lake.
  • Yang Qingshu, Luo Xianlin
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    Tidal gauge records are collected from three tidal stations in Lingdingyang Estuary. Fourier transform and inverse fourier transform are used to eliminate the components that periods are less than 4a from monthly mean time series. The secular trends of sea level are determined by means of linear regression of low passed time series. The empirical orthogonal function (EOF) is used to analyse the spatial and temperal characteristics of sea level change in Lingdingyang Estuary. The average rate of sea level change in Lingdingyang Estuary, which is estimated by the time series of the main mode, is 0.89 mm/a.
  • Wang Hongyang
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    Urban land evolution reflects the law, tendency and contradiction in economic and social development. This paper explains the fundamental theoretical problems of urban land evolution research. And then four features of urban land evolution in Suzhou area are summarized including amount, location structure, function structure and spatial structure features. At last the mechanism of urban land evolution is analyzed. It is pointed out that the decisive factor influencing urban land evolution is economic growth and economic structure in the 1980’s-1990’s in this area.
  • Lin Nianfeng, Tang Jie
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    There are many reports about endemic arseniasis in China. Jianan in Taiwan, Kuitun in Xinjiang, Hetao area in Inner Mongolia and Datong in Shanxi are four typical arseniasis areas. The arseniasis areas are mostly deposits of river and limnetic facies or marine bed with clay, clayey and organic mud, and belong to environment with rich organic matter. Arsenic in groundwater is 0.2-0.6 mg/L and some harmful organic materials, such as fluorine, humic acid, methyl arsenate and hydrocarbon. Arseniasis related mainly to total arsenic, As3+ and methyl arsenate. Besides arseniasis, there are fluorosis and cancer in these areas. Because of the difference of chemical compounds in ground water, there are different "dangerous concentration" and arseniasis types. Three geological environmental types are classified. The paper not only summarize the characteristics of geological environment but also provides important basis for prevention, cure and research of arseniasis.
  • Peng Hua
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    Urban tourism is an important part of contemporary tourism. However, different cities have different models for tourism development. As a highly complex system, tourism can’t achieve sustainable development without the social, economic and cultural setting of the city. This paper argues that the motivational mechanism of sustainable urban tourism should rely on the analysis of different elements related to it, in order to find the major and secondary elements for urban tourism. Business tourism is the main target market of cities with a focus on economic development. Shantou City is not a traditional destination with tourist resources. Its tourism should follow the model of commercial urban tourism leading to regional tourism development. Therefore, the sustainable development of the city should come before sustainable tourism.
  • Xie Shunping, Tian Desen
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    A New Method of three-dimensional terrain model of illumination and dynamic display proposed by the authors, which is the most realistic. The procedure of created different level of detail DEM are given, and processing algorithm and methods appropriate to 3-D terrain model, such as illumination model, hidden surfacese limination, visibility test and shading, are disscussed. Furthermore, dynamic display method of 3-D terrain model appropriate to micro-computer is also discribed in this paper.
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    Lu Lachang, Xu Xieqiang
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    With the change of geopolitical pattern of the world, Pacific rim area increases economic cooperation,instead of military antagonism. Afer reform and open to outside world, south China takes in an amount of investment from Hongkong, Macao and Taiwan, taking advantage of superior geo environment and thus forms a typical model of core periphery. The core Periphery model in south China is territorially made of three parts: core area Hongkong, Macao and Taiwan; second core area Zhujiang delta; peripherial area Hunan Province, Jiangxi Province, Fujian Province and Hainan Province and the Guangxi zhuang Autonomous Region. The evolution of this model can be divided into four stages: (1)the stage of polarization of core area; (2)the stage of second core area strongly controlled by core area; (3)the transitional stage of second core area; (4)the stage of south China territorially unified. Taking the core periphery model in south China as an integrity of interrelational and rational division, its whole functional organized system is “input-product-assemble-output”, core area is mainly the managed and transported centre, second core area has product and productive control function and become centre of manufacturing centre of study and development, periphery area is constructed as the centre of material and raw material and the base of agricutural and side line product. Based on the analysis of the formative structure,evolutional law and the design of territorial function, we suggust the way of territerial optimization as follows: (1) to establish the large hinterland which takes Xijiang water basin as its core; (2) to construct the hign and renewed technogical corridor; (3) to construct stable and varied material and raw material bases; (4) to reinforce the organization and adjustment and managment between core area, second core area and periphericl area; (5) to constuct the varied corridor among core area, second core area and perpheric area.

  • Li Jun, Zhou Chenghu
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    More and more geospatial data have been used, but some basic concepts of geospatial data such as geospatial data, basic characteristics, are still have not consistent definitions. Based on those problems, the paper describes the sources, definition of geospatial data, and mainly describes the basic characteristics of geospatial data such as multi spatial scale, multi temporal scale, distributed characteristics and topographical relationship.
  • Li Sen, Xia Xuncheng, Xiao Honglang, Yang Gensheng
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    The Sandy desertified land in Sahelian region of Northern Mali amounts to 254 880km2, occupying 55.3% of the area, and the sandy desertification is still in the intensely developing stage. Various eolian sands spreading widely on the surface is the material base for the occurrence and development of sandy desertification. The grain size composition of eolian sand in the region is dominated by fine sand, followed by very fine sand. Bacause of the impacts of sand origin, accumulation condition and development course, there are some differences in the features of grain size of various dune sand. The eolian sand consists of 26 minerals, among which 21 are heavy minerals, Occuprging 0.1-2.0 percent. The stable and very stable minerals are dominating in these heavy minerals, and the heavy minerals have high stability and maturity. The eolian sand in this region mainly originates from reactivation of ancient sand dunes, modern fluvial action, dry lake deflation and older river courses. According to preliminary study, there are at least 4 major periods of eolian sand development in the region, i.e. Pliocene-early Quaternary, last glacial period, Holocene and modern times; among them the Holocene has 3 aeolian stages, namely early Holocene (10.3-9.2 ka B.P.), mid Holocene (6.8-5.8 ka B.P.) and late Holocene (3.5-1.8 ka B.P.). In the orderly fluctuated courses of alternately dry humid changes in the global climate the eolian sand underwent development, expansionfixation and soil formation in the region.
  • Xu Yong
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    In view of ensuring food safety and realizing sustainable development of agriculture, the problems of effective utilization of agricultural resoruces (EUAR) are being followed with interest by the government and academic circles of China. The author carries out discussion about some much needed theroretical and methodological problems of EUAR research. The paper includes some sections as follows. Firstly, the author defines the conception of agricultural resources,and divides agricultural resources into two parts. Agricultural natural resources include climatic resources, soil resources, water resources, biological resources and land resources, etc. And agricultural social economic resources include man made materials, labor force, science and technology, information, management, etc. Secondly, the author discusses and corrects the measurement standards of EUAR. Those corrected standards include: economizing resources and increasing utilization and output ratio of resources; using effectively resources, and meeting the needs of agricultural products; increasing the input output benefits of agricultural production; not polluting environment, and keeping agricultural ecologicalenvironment of high quality; not bringing about the retro gradation of resources, and utilizing sustainable resources. Thirdly, the author expounds the targets and contents of EUAR appraisement around the measurement standards of EUAR. Fourthly, the author puts forward some basic ways of EUAR evaluation, which include index methods, model methods and regional methods. Lastly, the paper offers some proposals of promoting the effective utility evaluation of agricultural resources in China.
  • Li Cun
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    Huizhou City originated in late part of the Spring and Autumn Perrod, which was set up in the east of Guangdong in the Qin Dynasty, was the ascertainable beginning of Huizhou City. Development of Xizhijiang (a branch of Dongjiang) drainage basin in the period from the Eastern Jin Dynasty to the Southern and Northern Dynasties strengthened the function of Huizhou City. The economy and culture of hinterland of Huizhou City was developing rapidly in the Song Dynasty, and Huizhou had already been a city with rather flourishing handicraft industy and market then. Since the Ming Dynasty, the regional structure of Huizhou City had been differentiating. Due to undeveloped commodity economy, Huizhou was still an administrative local city by 1978. In recent 20 years, especially the latter decade, Huizhou is changing into an industrial city with leading industries of electron, automobile and oil, While its function as the central place of Dongjiang drainage basin and nearby coastland is to be resumed and developed. According to the conclusion drawn from history, the main motive force of sustainable development of Huizhou City will come from industrialization and reconstruction of transportation junction. Great attention should be paid promptly to the transportation problem.
  • Zhao Xinyi, Liu Jihan
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    Based on the fact that the ratio of actual evapotranspiration to potential evapotranspiration depends on the availability of soil moiture and crop growth stages, Crop Water Stress Index (CWSI) is submitted to express the crop drought. The CWSI by ten days interval during 11(1980-1991) winter wheat growth years of 60 stations in Huang-Huai-Hai Plain were calculated in this paper. Then we analyzed the characteristics of CWSI in time and space scale. And the CWSI on the conditions of rain-feed and that of irrigation are compared.
  • Mei Lin, Yang Qingshan
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    The essay applied theories of urban economic region and industrial system, to analyze the main problems in industrial development in Harbin urban economic region, and mentioned the strategic decision of industrial structure adjustment and spatial pattern of industry in Harbin urban economic region.
  • Yu Muqing, Zhu Yanming, Tian Wei, Liu Jingshuang
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    With the tourism development of the Changbai Mountains Nature Reserve famous in the world in recent years, as a result of being short of environmental management measures, there appeared certain environmental pollution and obvious ecological damage. The only way to coordinate better relationship between tourism development and environmental protection is to insist on the rule of sustainable development. For this reason, it must set up the complete technique and management system and take a series of countermeasures and steps depending on the local situation.