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    25 June 1993, Volume 8 Issue 2 Previous Issue    Next Issue
    Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    A PRELIMINARY EVALUATION OF THE MOUNT QOMOLANGMA NATURE RESERVE
    Li Bosheng
    1993, 8 (2):  97-104.  doi: 10.11849/zrzyxb.1993.02.001
    Abstract ( )   PDF (631KB) ( )   Save
    Nature reserve is a genral concept. Due to different localities and different natural features, there are different objectives and pretection purposes. Each nature reserve will be managed according to certain classification and grade. Obviously, before a nature reserve is chosen and its classification and grade, scientific evaluation for the protection area must be made.The mount Qomolangma Nature Reserve is located in Tibet Autonomous Region of Southwestern China. Its location is approximately between latitudes 27°48'--29°19' N and longitutes 84°27'-88°00'E. The whole area is approximately 33910km2. About 12000 families live in the Reserve with a total population of 67 000 Tibetan people. Administratively the Reserve belongs to the Shigatse Administration's Dingri, Jilong, Nielamu, Dingjie and Saga Counties.The reserve not only has the special regional characteristics of the natural geological units of the south Tibet Plateau and the central Himalaya montane System. At the same time, it also has many rare and endangered wildlife and botanical species that are on the nation's protection list. The Reserve still keeps its naturalness and is very attractive. The ecosystem of the Reserve is very fragile It is in need of protection. The area is so large and diverse that it has tremendous potential for scientific research. According to the above-mentioned reasons, the Mount Qomolangma Nature Reserve should belong to the multidisciplinary type (or the ecological system protection area) and should be classified as a national-level nature reserve.
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    STUDIES ON THE NATURAL RESOURCES AND THE ESTABL- ISH1NG OF NATIONAL CROP COMMODITY BASE IN HUANG-HUAI-HAI REGION
    Han Xiangling, Liu Xunhao, Qu Manli, Wang Hongguang
    1993, 8 (2):  105-114.  doi: 10.11849/zrzyxb.1993.02.002
    Abstract ( )   PDF (595KB) ( )   Save
    Based on the natural and social economic conditions of main agricultural region in China-Huang-Huai-Hai region (HHH) and the analysis of the climate-soil ecological adaptation of main four crops (wheat, corn, soybean, cotton),the potential commodity amount of the four crops are calculated using the method of graded estimating the productivity. It has been proved possible to establish national commodity base in stretches in this region.
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    A NEW EXPLORATION FOR THE EXPLOITATION AND UTILIZATION OF THE LIMESTONE BARREN HILLS IN SOUTH CHINA
    Xu Qiaoli
    1993, 8 (2):  115-121.  doi: 10.11849/zrzyxb.1993.02.003
    Abstract ( )   PDF (548KB) ( )   Save
    Widely distributed in the south of China, the limestone barren hills are a result of regressive succession under the intervention of long-term predatory farming activities of mankind. The productivity of these hills is low and how to make rational use of them is a problem to be solved. Based on systematic analysis and evaluation of the regressive succession in limestone mountainous regions and the various existing ways of utilization, this article presents a new way of utilization, that is, to produce leguminous bush fodder crops on limestone hills. This new way will make it possible to break a new path for the exploitation and utilization of the limestone barren hills, and it will become a green-project with profound significance in southern limestone mountainous regions.
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    THE ECOLOGICAL SYSTEM AND THE EXPLOITATION MODEL OF TIDAL FLATS--A CASE STUDY OF THE TIDAL FLATS OF DAFENG COUNTY, JIANGSU PROVINCE
    Ke Xiankun
    1993, 8 (2):  122-131.  doi: 10.11849/zrzyxb.1993.02.004
    Abstract ( )   PDF (714KB) ( )   Save
    On the basis of the characteristics of physical geography, marine dynamics and biology of Dafeng coast, this paper makes a study on the geornorphological and sedimentary processes of the tidal flats of Dafeng affected by larg rivers, discusses the influence of the old Huanghe River and Changjiang River in the area, and expounds the space structure and evolution of the ecological communities of the tidal flats. This paper also reviews the current state of the exploitation of the tidal flats and their economic and environmental benefits. According to the understanding of the characteristics of the natural ecosystem, a rational exploitation model of the tidal flats of Dafeng was proposed.
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    WATER RESOURCE EXPLOITATION AND WATER ENVIRONMENT PROTECTION OF CHANGXING ISLAND, SHANGHAI
    Wang Yong, Yuan Renliang, Qi Renhai
    1993, 8 (2):  132-141.  doi: 10.11849/zrzyxb.1993.02.005
    Abstract ( )   PDF (655KB) ( )   Save
    Changxinng Island, is an estuary sand island of the Yangtze River, is located in the suburb of Shanghai. It will play a very important role in the economic development of Shanghai metropolis and New Pudong Area. The systematic survey and analysis of the water resource and water environment show that abundant amount and high quality of water lay a sound foundation for the development of the island. The trend of water quality and water resource from 1992 to 2000 is forecasted by a systematic dynamics model, which consists of 9 blocks of important factors such as economics, environment, population, etc. Study points out that the exploitation of Changxing Island should rely on the environmental protection principle and an overall developmental plan of Pudong and Shanghai city. Changxing Island should be exploited as a new drinking water source island of Shanghai, a convalescent and tourist center in eastern Shanghai, as well as a base to produce and process the high-quality and no-polluted farmland sideline products.
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    THE TIME AND QUANTITY OPTIMIZATION OF FIELD IRRIGATION UNDER THE CONDITION OF A LIMITED WATER SUPPLY——A CASE STUDY OF THE YUNDONG REGION OF HEBEI PROVINCE
    Yao Zhijun, Huang Rangtang
    1993, 8 (2):  142-149.  doi: 10.11849/zrzyxb.1993.02.006
    Abstract ( )   PDF (472KB) ( )   Save
    This paper explores a calculation method of time and quantity optimization for field irriga tion under the condition of a limited water supply. Used as an example, three main crops in the Yundong region, Hebei Province, are systematically calculated. The results and analysis of the systematic calculation show that the use of the time and quantity optimization model can bring about obvious economic benefits for crop production and that the model as a calculation method also has certain practical significance.
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    A STUDY ON CLIMATIC PRODUCTIVITY OF PHOTOSYNTH- ETIC PRODUCTS IN FRESHWATER AREAS OF CHINA
    Liu Naizhuang, Zhang Yonghong
    1993, 8 (2):  150-157.  doi: 10.11849/zrzyxb.1993.02.007
    Abstract ( )   PDF (511KB) ( )   Save
    In this paper, some geographical distribution laws of the photosynthetical productivity and the climatic productivity of phytoplankton in freshwater areas of eastern part of China are calculated theoretically with the climato-ecological method. From these results we can know that the annual climatic productivity of primary products in freshwater areas distributes mainly along the latitude and decreases progressively from south to north. Its range of variation is from 1.6-24.4 gC/m2.a. In view of the climatic resource of the photosynthesis of phytolankton, the net fish production in natural freshwater areas at different latitudes must be made in accordance with the different climatic conditions of photosynthesis.
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    AN ANALYSIS OF THE CLIMATIC RESOURCE OF GROUND TEMPERATURE IN THE NORTH PART OF THE AILAO,MOUNTAINS YUNNAN PROVINCE
    Liu Yuhong
    1993, 8 (2):  158-165.  doi: 10.11849/zrzyxb.1993.02.008
    Abstract ( )   PDF (477KB) ( )   Save
    According to a comparison of the ground temperature and the air temperature of eight meteorological stations at different elevations on the east and west slopes of the Ailao Mountains in the same time period, the climatic resource including the difference between ground temperature and air temperature, the ground temperature and the accumulated ground temperature in the north part of the Ailao Mountains are discussed in the paper.
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    THE IMPACT OF THE CONTEMPORARY CLIMATIC CHANGE ON CHINA'S HEAT RESOURCE
    Liu Yunfen
    1993, 8 (2):  166-175.  doi: 10.11849/zrzyxb.1993.02.009
    Abstract ( )   PDF (487KB) ( )   Save
    In the global climatic change, China's climatic change will be more complicated and its impact on the agricultural climatic resources and agricultural production will also be more obvious. Therefore, it is absolutely necessary taking the agricultural climatic resources as a comprehensive climatic information system to evaluate he impact of the climatic change on agriculture and explore the correspondent ways to deal with it. This article studies the impact of climatic change on China's heat resource, and makes a co relation analysis of the climatic conditions and the agricultural climatic heat resource in order to establish a regression equation and make simulant computation with the Monte Carlo Method. In addition, it analyses the change of the heat resource that possible results from climatic change, evaluates its impact on agriculture, and finally sets forth the correspondent countermeasu es.
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    THE AGGREGATION-DISAGGREGATION MODEL FOR OPTIMAL REGULATION OF THE MULTIRESERVOIR SYSTEM FOR IRRIGATION
    Cai Jinshan, Chen Chuanyou
    1993, 8 (2):  176-183.  doi: 10.11849/zrzyxb.1993.02.010
    Abstract ( )   PDF (507KB) ( )   Save
    A sharp contradiction between water-supply and water-demand has been created because the water resources which can be used are limited and the water-demand of industry and agriculture is increasing with the development of national economy. Therefore, it is of practical significance to apply optimal regulation to reservoirs. Using systematic analysis method, the study herein establishes an aggregation-disaggregation model for the optimal regulation of multireservoirs, so as to obtain the optimal operation policy whilst keeping the whole benefit of the reservoir system optimal. Accordingly, the operation and management of reservoirs will be based on science.
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    THE SHADOW PRICE CALCULATION AND SENSITIVITY ANALYSIS OF THE LINEAR PLANNING RESULT IN LAND UTILIZATION PLANNING
    Zhang Hongjiang, Guan Junwei
    1993, 8 (2):  184-192.  doi: 10.11849/zrzyxb.1993.02.011
    Abstract ( )   PDF (526KB) ( )   Save
    In land utilization planning, to calculate the shadow price of the linear planning result may determine for the objective function (S) the additional contribution value produced by the result at the time of optimus state and when certain limiting condition (aijxi=bi) is relaxed. On the other hand, the sensitivity analysis solves the permitted feasible change scope of the resource restriction quantity (bi) and the benefit coefficient (ci). Here the change scope is brought about by the change of market situation and production process under the condition that the linear planning still keeps the optimum solution. As the above mentioned calculation and analysis, the static linear planning model is made to move a step forward toward the direction of the dynamic model. This expands the realm for it to be popularized and applied in a certain place and at a certain time.
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