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  • 1989 Volume 9 Issue 1
    Published: 20 January 1989
      
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  • HUMAN IMPACT ON THE COASTAL MORPHOLOGY AND SEDIMENTATION OF NORTH CHINA
    Ren Meie
    1989, 9(1): 1-7,95. https://doi.org/10.13249/j.cnki.sgs.1989.01.1
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    This paper discusses major coastal landforms and sedimentation affected directly or indirectly by human activities:(1)The coastal plain of Ncrth diangsu and its associated subaqueous delta of the abandoned Huanghe River were the direct result of human diversion of the Huanghe River southwards between 1128 and 1854 AD.(2)The present Huanghe River delta is river-dominated and micro-tidal,but has an arcuate form due indirectly to man’s cultivation of the Loess Plateau and the huge sediment load(1.1 billion tons per annum)resulting from accelerated erosion. Accumulation rate of the Bohai Sea is also greatly affected by human activity.Detailed analysis of historical data shows that during the last 5,000 years,the Huanghe River did not flow into the Bohai Sea for 758 years and annual sediment input into the Bohai Sea reached 1.1 billion tons for only 840 years.These data together with coring and shallow seismic profiling data seem to indicate that the accumulation rate of the Bohai Sea averages about 0.6-0.7m/ka in the Holocene. Man is a geological agent.This paper illustrates the enormous scale of human impact on morphology and sedimentation of the coastal zone and shows that river and sea form an integrated system,the study of whcih should receive more attention from geo-scientists.
  • COMPARATIVE STUDY OF TUNDRAS IN LAPPLAND AND THE CHANGBAI MOUNTAIN
    Huang Xichou, Zhao Kuiyi
    1989, 9(1): 8-15,95. https://doi.org/10.13249/j.cnki.sgs.1989.01.8
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    The northern part of Finno-Scandinaviya within the Arctic Circle is called Lappland by Finnish.There exist wide mountain tundras in Lappland,from which the term of tundra is was originated. Based en the field investigation,tnndras in Lappland and the Changbai Mountain are compared and analyzed in terms of compositions of plant commities,vegetation charaeteristitics andfeatures of plants.The analysis indicates that the ecological environment of mountain tundras in Lappland and the Changbai Mountain are extremely similar.The chartics of both mountain tundras show that the distribution of mountaintundra follow the the natural differential law,presenting the differences of different zones and regions.Tundra is a global natural lanascape type.the comparative study,the new discovery confirmed that the exists alpine tunddra in the Changbai Mountain.
  • RESEARCH ON THEORY OF INDUSTRIAL DISTRIBUTION IN CHINA
    Wei Xinzhen
    1989, 9(1): 16-24,95. https://doi.org/10.13249/j.cnki.sgs.1989.01.16
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    With the development of modern industrial technology,the system of industry has been divided into two sectors:traditional industry and high-technology industry. The research on theory of distribution of traditional industry includes the following aspects.1)The change of factors influencing the location of traditional industry in different regions and periods is that some originally non-essential factors are becoming more and more important,meanwhile the importance of essential factors is varying with its internal mechnism of industry. 2)The influence of operating mechanism of economy on industrial distribution results in expansion,contract and adjustment by industry itself.3)At present the research of industrial location has deepened to the optimum organization of some relative industries across regions. The research on theory of distribution of high-technology industry are as follows.1)The characters and composition of high-technology industry.At preseant there are three kinds of high-technology parks:economic parks,technological parks and scientific parks.2)Location factors influencing hightechnology industry are the high density of intelligence directional to hightechnology industry;the developing technology and perfect facilities;and the fine environment for production and living.3)The structure and distribution of high-technology parks.A short way is to set up high-technology parks around old dence-intelligence districts.High-technology parks have become the main form of developing high-technilogy industry;It is the direction of new technology in the next century.
  • A PRELIMINARY RESEARCH ON THE REGULARITY AND FACTORS OF CHANGES OF FLOOD AND DROUGHT IN TAIHU LAKE BASIN SINCE THE SOUTHERN SONG DYNASTY
    Chen Jiaqi
    1989, 9(1): 25-33,95. https://doi.org/10.13249/j.cnki.sgs.1989.01.25
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    The grade sequence(1121-1983 AD)of flood and drought was reconstructed by means of processing information of the historic flood and drought,on the basis of systematical collection of historic climate records.It was divided into nine grades. The characteristics of the distribution both in time and space and the change regularity of flood and drought were studied through analysis of periodic change,In the meantime,the factors of flood and drought were preliminarily studied by analysing the relationships between flood/drought and cold/warm, as well as flood/drought and solar activity. The results showed that tha change of flood and drought in the Taihu Lake basin was a combined variation in which the main cycle was quasi-100 years and other cycles were quasi-11 years,Since the Southern Song Dynasty two wetter periods which lasted about 200 years respectively occurred in the 14th and 15th centuries and the 18th century.The former was wetter than the latter.Generally,during these wetter periods the winter was warmer and the solar activity was stronger.
  • THE INFORMATION SYSTEM OF MARSH ECOSYSTEM OF SANJIANG PLAIN REGION AND ITS APPLICATIONS
    Wan Enpu, Wang Yeqiao, Bo Liqun, Chen Chun
    1989, 9(1): 34-42,95. https://doi.org/10.13249/j.cnki.sgs.1989.01.34
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    Information system of marsh ecosystem is a specialized information system.Setting up the information system of marsh ecosystem in the Sanjiang Plain region has an important significance in comprehensively analyzing and dynamicly moritoring marsh environment as well as in making a regional territory resource managerment and national economy program. The information system of marsh ecosystem contains two subsystems. the marsh resource and the geographic environment in marsh area.The data mainly come from various maps,governmental reports and field investigations.The data were approved by the governmental department concerned.It has an extensive practicality and authority.Before the data were input the data base,the process of classification and standardization had been made and then a code was given to the data according to the meaning of each code figure. The system adopts CCDOS as the operating system.It was operated by the way of menu control.The mainly used software is dBASE-Ⅲ,the prograruing languages of BASIC,FORTRAN andAssembler were used to extend the system functions.In technology,a particular attention was placed on the identity of map and data.It not only stressed the relation between maps and data,but also strengthened the space position of the data.It is convenient for the users in different ways.
  • FEATURES OF SOLAR RADIATION ON INCLINED SURFACES IN CHANGCHUN
    Zhu Zhihui
    1989, 9(1): 43-50,95. https://doi.org/10.13249/j.cnki.sgs.1989.01.43
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    Orientational characteristics and seasonal variation of monthly average daily and annual sums of extraterrestrial,direct,global radiation and sunshine duration on various inclined surfaces in Changchun.Jilin Province are computed and analyzed,The good azimuthes,the Optimum inclination angles suitable for solar energy utilization and the relevant direct and global radiation on these inclined surfaces are discussed and determined. The computative results indicate that the various radiations on non-horizontal surfaces in Changchun vary remarkably with slope and orientation.The optimum inclination angles fixed annually facing south is 45癴or direct radiation and 43癴or global radiation,The annual sums of direct and global radiation on the optimum inclined surfaces are 37% and 25% more than those on horizontal surface respectively.When south-facing optimum slopes are fixed for each month,the annual sums of monthly direct and global radiation on the optimum inclined surfaces can reach 149% and 135% of those on horizontal surface respectively.
  • THE REGIONAL AND SEASONAL DISTRIBUTION OF AUTUMN RAIN IN WEST CHINA
    Liang Jianhong
    1989, 9(1): 51-59,96. https://doi.org/10.13249/j.cnki.sgs.1989.01.51
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    This paper discusses autumn rain in West China in terms of climate.The climatic data in West China during 1951 to 1980 are used to divide autumn rain region in West China into three classes.,typical,sub-typical and general areas.The beginning and ending dates of autumn rain in West China are defined.The beginning and ending dates correspond to two sudden changes in atmospheric circulation from summer to winter.Bassed on the mean rainfall of 40 stations selected in the autumn rain region,the cyclic changes in the last thirty years are studied with the method of harmonic analysis.
  • DYNAMIC SIMULATION OF SOCIAL-ECONOMIC-ECOLOGIC COMPLEX SYSTEM IN LONGJING COUNTY,JILIN PROVINCE
    Yang Binggeng, Zhao Shipeng
    1989, 9(1): 60-66,96. https://doi.org/10.13249/j.cnki.sgs.1989.01.60
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    According to the principles and methods of system dynamics,the socialeconomic-ecologic complex system in Longjing County,Jilin Prcvince is simulated dynamically.On the basis of the evolution orbit of the complex system during the past 36 years,a set of dynamic models are established and the future development trends of the complex system with four different strategies are simulated.Through comparison and analysis,“Harmonization Type”development strategy is proposed as the basis of adjusting and controlling the complex system,
  • AN INVESTIGATION OF THE IMPACT OF ECOLOGICAL ENVIRONMENT ON DYNAMICS OF PHYSIOLOGICAL PREMATURE DROP OF WENZHOU CITRUS IN SUBTROPIC ZONE
    Wang Duo, Yu Jican, Yi Meide, Guo Wenyang
    1989, 9(1): 67-74,96. https://doi.org/10.13249/j.cnki.sgs.1989.01.67
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    The observational data of phenology and environment during physiological drop phase of Wenzhou citrus in May of 1986 and 1987 are used to analyze both the dynamic feature of blossom drop and premature drop of citrus and the conditions of ecological environment of citrus orchards,such as topography,climate,soil and vegetation. The dynamic trends of the summation percentage of blossom drop and premature drop of citrus are simulated by means of the Logistic theory curve. It is revealed that the differences of dynamic features of blossom drop and premature drop of citrus between the normal year 1987 and the abnormal year 1986.The differences of weather-climate in the middle ten days of May between 1986 and 1987 are compared and analyzed. The results show that the middle period of the middle ten days of May is the peak period of blossom drop and premature drop of citrus.In the middle the days of May 1986,the rapid physiological premature drop and the sharp increase of drop amount were caused by high temperature and low moisture.Therefore,the proper agrotechnical measures taken in time according to the weather conditions during the middle ten days of May is an important link to strengthen the management of citrus orchards. An empiric model obtained based on the Logistic theory model and by the amendment of ecological environment factors(temperature and moisture)have improved simulation effect.It can be applied to predict the dynamics of blossom drop and premature drop of citrus in that year,in order to take necessary measures in a critical moment.
  • FLOROGEOGRAPHICAL ANALYSIS OF SPERMATO-PHYTE IN THE CHANGBAI MOUNTAIN
    Qian Hong
    1989, 9(1): 75-84,96. https://doi.org/10.13249/j.cnki.sgs.1989.01.75
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    In the Changbai Mountain Vegetion is well developed.From bottom to top, four vertical vegetation zones can be divided:1)breadleaf-Korean pine forest zone;2)spruce-fir coniferous forest zone;3)subalpine Erman birch forest zone;and 4)alpine tundra zone.The spermatophyte flora of the Changbai Mountain comprises 491 genera.According to the distributional comparative analysis of these genera,they can be divided into 14 distribution-types: Cosmopolitan(69 genera);Pantropic(29);Tropical America and Tropical Asia (1);Old World Tropic(4);Tropical Asia and Tropical Australia(3);Tropical Asia to Tropical Africa(7);Tropical SE.Asia(Indo-Malayan)(3);North Temperate(205);E.Asia and N.America(45);Old World Temperate(Eurasia)(59);Temperate Asia(25);E.Asia(Sino-Himalaya & Sino-Japan)(37); Mediterranean,Western Asia to Central Asia(3);Central Asia(1).