Please wait a minute...

当期目录

    1995年, 第5卷, 第2期 刊出日期:1995-06-20 上一期    下一期
    全选选: 隐藏/显示图片
    论文
    THE CLIMATIC CONDITIONS OF POLAR-TYPE GLACIERS DEVELOPMENT IN CHINA
    黄茂桓
    1995 (2):  97-103. 
    摘要 ( 920 )   PDF(2473KB) ( 835 )  

    Around the Kunlun Peak there are many huge and broad mountains lifting above the Equilibrium Line altitade (ELA), forming the largest glacier distribution centre in China. Here the ELA is very high and the glacier existence is attributed to the unfavorableness of ablation, not the favorablenesses of accumulation. In the ablation period strong evaporation-sublimation and conduction expend a large amount of heat. restraining melting. In addition, meltwater is easy to refreeze. forming superimposed ice and then reducing mass loss. Low air temperature causes low ablation rate and short ablation period. Arid and cold climate is favorable to glacier development. comparable to the polar regions. Nonuniform precipitation decreases heat income during the ablation period and increases heat loss in winter. also resulting in restraining ablation.

    相关文章 | 计量指标
    RELATIVE SEA LEVEL RISE AND ITS EFFECTS ON ENVIRONMENT AND RESOURCES IN CHINA'S COASTAL AREAS
    杨桂山
    1995 (2):  104-115. 
    摘要 ( 1188 )   PDF(2631KB) ( 849 )  

    Due to global climate warming and natural and man-made land subsidence etc., relative sea level rise in the coastal plains of China will exceed 2-3 times over the golbal mean value during the first half part of the 21st century. It will result in a series of adverse impacts on evolution of natural environment and socioeconomic development of the coastal area. This paper analyses environmental and resource effects induced by relative sea level rise in China's coastal areas on the basis of rough estimate of future relative sea level rise. These effects include inundating tidal flat and wetlands and increase in inundated risk of coastal habitable land,exacerbating storm surge. coastal erosion, flooding and salt water intrusion hazards.as well as endangering land. water. tourism and living resources and their utilization.

    相关文章 | 计量指标
    ON REGIONAL DIFFERENTIATION OF RIVER WATER ENVIRONMENT CAPACITY AND STRATEGIES TO CONTROL WATER ENVIRONMENT POLLUTION IN CHINA
    王华东, 王淑华, 鲍全盛, 祁忠
    1995 (2):  116-124. 
    摘要 ( 855 )   PDF(2452KB) ( 783 )  

    China has large population and wide territory, the natural conditions of different regions are complicated. water resources are distributed unbalanced.economic developing states are unequal. For these reasons the variation of concerned water environment capacity has obvious character of regional differentiation. In this paper, from the economic development point of view, the regular pattern of regional differentiation of China's water environment capacity resources is analyzed. the concept of contradictory degree between water environment capacity and economic development is introduced, based on them, rivers in China are divided into three regions, and corresponding strategies to control water pollution are advanced. The aims are to use river water environment capacity resources effectively. to control pollution and to improve environmental quality.

    相关文章 | 计量指标
    A STUDY ON STRUCTURAL ANALYSIS OF SUBURBAN ECOLOGICAL AND ECONOMIC SYSTEM─Taking Tianjin Suburbs and Counties for Example
    张宝光
    1995 (2):  125-136. 
    摘要 ( 655 )   PDF(2568KB) ( 905 )  

    Along with the development of urban economy. the growth of urban population and the increase of needs of urban society, the suburban ecological and economic system changes constantly and profoundly in its structure and function.Intensifying the research on structural analysis of suburban ecological and economic system is of great significance for grasping light the laws governing the development and evolution of the suburban ecological and economic system and leading this system onto a path of sound circle. By making comprehensive use of the cluster analysis and latent structural analysis the author attempts to explore a new avenue of revealing the structure of suburban ecological and economic system, taking Tianjin suburbs and counties as an example. The results obtained from the above-stated analyses show that it is entirely possible and extremely effective to study the structure and function of suburban ecological and economic system and provide scientific evidence for control of this system by using mathematical methods and statistical analyses.

    相关文章 | 计量指标
    PALEOSOLS OF SANDY LANDS AND ENVIRONMENTAL CHANGES IN THE WESTERN PART OF NORTHEAST PLAIN OF CHINA WESTERN DURING HOLOCENE
    裘善文, 李取生, 夏玉梅, 王璟璐
    1995 (2):  137-148. 
    摘要 ( 765 )   PDF(2677KB) ( 914 )  

    Two-three paleosol layers were formed in the western part of the Northeast Plain. China during Holocene. These paleosol layers interlaid with eolian fine sand layers. Dated by 14C dating. archeology and TL and analyzed by statistics.the formation periods of paleosols are divided from the results. The periods are 11000-7000 5500-4500. 3500-2800 and 1400-1000 a B. P. respectively.According to the spore-pollen compositions in more than ten sand dune paleosol profiles, it is discovered th.t there is little spore-pollen in the sand layers and a little spore-pollen in the paleosol layers. The spore-pollen compositions in the paleosols are simple. mainly Artemisia (50%-70%) and Chenopodiaceae. In the paleosols of 11000-7000 a B. P.. the spore-pollen composition is Artemisia-Rubiaceaechenopodiaceae. The contents of Ephedra pollen in the lower and upper parts of the layer are less than that in the middle part. In the paleosols of 5500-4500 a B. P.,the spore-pollen composition is Artem isal-Chenopod iaceae-Melilotus. There is some Salix sp. and Betula sp. pollen in the lower part of the layer and some Ephedra pollen in the upper part. In the paleosols of 3500-2800 a B. P.. the spore-pollen composition is Artemisia Chenopodiaceae-Rubiaceae. There are some Kochia and Baryaceae. In the paleosols of 1400-1000 a B. P., the spore-pollen composition is also Artemisia-Chjenopodiaceae-Rubiaceae. There is a little pine pollen. The grain size of paleosol is relatively coarse, but still finer than that of eolian sand and becomes coarser from the bottom to the top of the profile. This fact reflects that the weathering environments during the paleosol formation periods were wetter than that during the eolian periods and became dryer from middle to late Holocene.

    相关文章 | 计量指标
    PERMAFROST CHANGES AND ENVIRONMENTAL PROBLEMS ALONG THE QINGHAI-XIZANG HIGHWAY
    王绍令
    1995 (2):  149-156. 
    摘要 ( 628 )   PDF(2453KB) ( 836 )  

    The Environment of permafrost region along Qinghai-Xizang highway has been interfered and damaged seriously during the last years by mankind economic activities. Permafrost under the roadbed has been degenerated obviously. Tank range has been extended gradually and original natural environment around it has been damaged. The mileages of highway crossing the permafrost region today are shortened 18km than that of the 70's. In this paper, according to ice content, class of permafrost. relief and landforms etc., permafrost region along the highway and comprehensive evaluation zonation have been made. And specific measures for protecting the permafrost environment has been put forward.

    相关文章 | 计量指标
    CONTENT AND DISTRIBUTION OF TRACE ELEMENTS IN SOILS OF THE DAM RIVER AND TUOTUO RIVER BASINS
    邵庆春, 邓伟, 孙广友
    1995 (2):  157-169. 
    摘要 ( 914 )   PDF(2659KB) ( 887 )  

    Natural contents and distribution of trace elements in soils of the Dam River and Tuotuo River basins are demonstrated in this paper. By using contrasting methods. it is found that the content of trace elements of soil in the region is at the lower limit of the world's soil content level, that the tendency of the average trace element content in the four main types of soil is shown as: alpine mountain meadow soil>marsh soil>alpine mountain steppe soil> alpine mountain cryogenic soil. the average content of trace elements such as Cr. Co, Zn, Cu, Hg, Pb, Mo, Mn and Ni in the Dam River basin is higher than that of the Tuotuo River basin except that of the elements Ba and Sr. In addition. through correlation analysis. the relationship of intergrowth and association among soil elements are revealed.

    相关文章 | 计量指标
    BASIC FEATURES OF FOREST STEPPE IN THE LOESS PLATEAU OF CHINA
    朱志诚
    1995 (2):  170-174. 
    摘要 ( 900 )   PDF(2378KB) ( 873 )  

    The Loess Plateau is situated at 33°43′-41°16′N. 100°54′-114°33′E. It is covered with 50-150m deep loess. As it is eroded by flowing water for a long time, it formed alone hill-gully topography. Humidity and heat decrease by degrees from southeast to northwest, the forest is replaced by the steppe. and an obvious transitional zone formed between them, it is forest steppe. Its characteristic is that stunted xero-mesophilous trees distribute sparsely on the meadow steppe. the meadow steppe mainly consist of xero-mesophytes and meso-xerophytes. the trees cover degree isn't over than 20%. usually about 10%, sometimes below than 5%.A precipitation of about 420-520mm is a decisive factor of existence of the forest steppe in the Loess Plateau.

    相关文章 | 计量指标
    PRIMARY ANALYSIS ON WOMEN'S STATUS OF RENHE TOWN, BAIYUN DISTRICT, GUANGZHOU
    李玲
    1995 (2):  175-184. 
    摘要 ( 589 )   PDF(2611KB) ( 823 )  

    There are more women than men in Renhe Town, about 40% of women have jobs. Young women under 30 years old are mainly industrial workers.The average years of education for all women over 6 years old are 6.03, but for man they are 7. 64. The Women's Federation of Renhe Town is a vital organization.What it has done plays an active role in raising women/s social status and encouraging women to take part in the community life. In the past, women mainly participated in different collective agricultural labour assigned by their carders.Women had not much chance to show their intelligence and wisdom. Since the policy of 'reform and open door to the outside world' was carried out women have had more and more chance to bring their abilities into full play and many women become capable Persons of different trades and professions. Now, in Renhe, women are the main force of factories and dispensable part of all kinds of production work done in units of families.

    相关文章 | 计量指标
    POSSIBLE HYDROGEOCHEMICAL PRECONDITIONS FOR KASHIN-BECK DISEASE IN TRANSBAIKALIA
    Zamana Leonid Vasilevich
    1995 (2):  185-192. 
    摘要 ( 732 )   PDF(2464KB) ( 874 )  

    In the basin of the Amur River at the territory of Russia, in the northern regions of China and Korea the osteal-articulate disease of people and animals, well known as Kashin-Beck disease is spread. About 20 hypotheses had been suggested for explaining the disease causes. some of them are briefly introduced. The hydrogeochemical researches in Transbaikalia. Russia, showed that natural water of the endemic areas have several features in chemical composition.some of them are considered by existing hypotheses as the causes of the disease.others do not concern the possible etiologic factors of the disease for the present. The author examines these features respectively.

    相关文章 | 计量指标