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  • 1994 Volume 13 Issue 2
    Published: 15 June 1994
      
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  • ON THE STATISTICAL TEST OF THE PARALLEL RAISING OF THE PROFILE OF THE LOWER REACH YELLOW RIVER
    Jia Shaofeng
    1994, 13(2): 1-10. https://doi.org/10.11821/yj1994020001
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    The raising of river profile can be regarded as a stochastic process.The parallel raising of river profile means that the trend in the process is parallel.Whether the profile raising is parallel or not should be decided according to its trend raising and should not be judged according to its total or random raising,MA(moved average)model can be used to obtain the information of the trend raisong of the river profile.If the raising of profile is parallel,there will be following situations:1.The difference of water levels between two sites along the profile should be a constantu;2.The mean value of the annual raising of water levels at all sites along the profile should be equal.All these propositions are examinated by using statistical test methods(stutend test).Such conclution is obtained that the trend raising of the profile of the lower reach Yellow River is parallel(from Huayuankou to Lijin).
  • THE HYDRAULIC GEOMORPHOLOGICAL FEATURE AND THE CHANGE OF BEACH FACE IN JINZHOU BAY
    Fu Wenxia, Li Guangtian, Liu Guoxian
    1994, 13(2): 11-19. https://doi.org/10.11821/yj1994020002
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    Throughseveral yearhdd investigation and data analsis in laboratary in the area of the Jinzhou Bay,this paper described the hydraulic geomorphological feature of the beach face, the changes of beach profiles,the micromorphology and zoning,and then discussed the change of tidal flat zone and underwater shallow zone by the methods of the repeated,survey the comparison between old and new charts and the determination of sedimentation rate.The tidalflat of the bay is dominated by week accumulation,and the accumulation is more intersive flood perild which is about 11-25 mm The two sides of the river are mainly dominated by erosion in flood period and the mean erosion depth is 16-35 mm,and even deeper in the center of the eriver.The shallow zone which is 0-5m under water is not affected by abrupt erosiOnaccumulation,and belongs to a stable part.The accumulation estimated is 6 mm/a by the comparis on beween old and new charts.The sedimentation rate is 1-5 mm/a by the determination of 21pb of the 7 core samples and 2-4 mm/a by silt calculation, The three methods show almost the same results.
  • LAND RESOURCES AND DEVELOPING POTENTIAL IN THE “THREE NORTHS” SHELTER FOREST REGION OF CHINA
    Shen Yuancun
    1994, 13(2): 20-26. https://doi.org/10.11821/yj1994020003
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    The"Three Norths" shelter forest region occupies 41% of the territory.The region is divided into 1 2 natural districts in this paper according to the differentiation of land resources.The land is divided into 9 quality grades,Land suitable for farming is 26.1%,That for arbor is 14.09%.The percentage of land for bush is 9.5%,and for stock raising is 16.33%.Land for other uses makes up 33.94%.Compared with the present land use situation,the area of land for farming can be increased by 2.87%,and land for arbor and for bush can be increased by 9,09% and 6.66%respectively,The area of land for stock raising shouldbe decreased by 17.57%.This shows that in the process of land use structure adjustment,farmland can be increased and grass land should be decreased to develop arbor-bush-stock raising shelter system.
  • THE CLIMATIC CHARACTERISTICS OF THE SUBTROPICAL HIGH PRESSURE OVER THE NORTHERN PACIFIC REVEALED BY OLR
    Jiang Shangcheng, Zhang Weidong
    1994, 13(2): 27-33. https://doi.org/10.11821/yj1994020004
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    Using the outgoing longwave radiation(OLR)data observed from the NOAA satellites,the climatic characteristics of the subtropical high over the Northern Pacific is analysed.It is found that there is an outstanding annual circule of the East-West oscillation of the position and intensity of the Northern Pacitic tropieal high.There interesting phenomena are explained and a new approach to the research of the subtropical high with the satellite data is explored.
  • STUDY ON THE TOURIST LANDFORM IN HUANGSHAN MOUNTAION
    Sun Yufei
    1994, 13(2): 34-40. https://doi.org/10.11821/yj1994020005
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    In this paper,the origin and evolution of the tourist landform in Huangshan Moutain is studied from the viewpoint of geography.The author not only describes the splendid cloud sea、peculiar pines and luxuriant vegetation scattering over the Mountain,but also analyses the formation and development of the odd peaks、unigue stones、waterfalls、hotspring and grottoes in the Mountain.In addition,the author puts forward some constractive and effective suggestions to exploitand protect the tourist landform resources in Huangshan Mountain.
  • A STUDY ON SOME SPECIAL GROUND WIND EROSION IN THE TUNNEL
    Zou Xueyong, Liu Yuzhang, Wu Dan, Dong Guangrong
    1994, 13(2): 41-48. https://doi.org/10.11821/yj1994020006
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    The wind erosion features of the four typical ground are studied in the tunnel,in this paper,the imitated equations between wind erosion ratio(kg/m2·hr)and wind grade are expressed for some specific sonditions.In the process of the experiments,pure wind erodibilityand sand-carrying wind erodibility are considered in original and destroyed ground wind erosions.The resuIts of experiments indicate that the wind erosion ratio can be rapidly increased by sand-carrying wind or on the destroyed ground.Two significant phenomena are discovered,One is the existance of the process of gobi ground wind erosion balance,and another one is that eolian sand grain-size is related not only to the wind blowing time but also to thesource of sands and the change of wind grade.The experimental results provide important scientific basis for prevention and amelioration of wind erosion.
  • AMALYSES AND NUMEKRICAL STUDIES OF HEAT ISLAND OF XIAN CITY
    Sun Xudong, Sun Monlung, Li Zhaoyuan
    1994, 13(2): 49-54. https://doi.org/10.11821/yj1994020007
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    In order to understand the characteristics of Boundarv layer climate of the city of Xian,a svnthetic field observation on the boundary layer and the soil layer was carried Out from Oct.to Nov,in the Xian region,and several usefuI turbulence and radiation data are obtained.A two-Dimensional dynamical and thermal numerical model used in PBL structure of the city,The turbulence colosure is based on the turbulent energy equation;the soil properties and radiative properties are also considered in the model.The simulating results from the model are suitable to illustrate the situation of the Xian heat lsland by using field data.The result of calculations shows the existance of urban heat island which is several degrees higher in temperature than adjacent rural regions.The result also compares the importance of different factors such as artifical heat release,soil properties and the surface roughness.The total amount of fuel consumed in the Xian industrial area and its increase rate in recent yearsvhave been carefully studied.The predicted tendency seems good in compared with teh climatic analyses, which indicates that the urban-rural temperature difference in the year of 2000 is about 0.6℃ morethan that of the mowadays.
  • DEEP GRIEF OVER THE DEATH OF THE CHINESE FAMOUS GEOGRAPHER-PROFESSOR DENG JINGZHONG
    1994, 13(2): 55-58. https://doi.org/10.11821/yj1994020008
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    Mr. Deng Jingzhong,professor of the Institute of Geography of Chinese Academy of Sciences,the famous agricultural geographer at home and abroad,and the originator of Chinese agricultural regionalization research,died at Bei jing on January 18,1994.
  • DIVISION AND RECORGNITION OF MODERN YELLOW RIVER DELTA LOBES
    Xue Chunting
    1994, 13(2): 59-66. https://doi.org/10.11821/yj1994020009
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    Eight delta lobes have been constructed in the Modern Yellow River Delta since 1855,as a result of frequent shifting of the distributary channdls. The average acting time of the lobe is 16 years,The delta deposits formed in 1904-1929 are consisted in one of the delta lobe,The delta deposits formed in 1934-1938 and 1947-1964 make up another delta lobe,Delta deposits in the drill core are commonly composed of those from several lobes.The boundary between two lobes is mot obvious,being short of relatively coarse deposits,However,diffrent lobes still can be recorgnized based on sedimentary texture and structure,microfossils,210Pb dating and historical documents.Coarse silt is deposited in the middle part of the river mouth and clayey silt is accumulated in the lateral parts at the depth of 0-12m in water.The migration of the river mouth results in abrupt change in lithology,which often shows the boundary of two delta lobes.The clayey silt is in abundance of foraminifera in protelphidium tuberculatum assem-blages,although the deposits are not coarse silts or fine sands.
  • A LIMITATION SCORING METHOD USED IN THE LAND EVALUATION SYSTEM FOR NEW SOUTH WALES,AUSTRALIA
    Zhang Homgye
    1994, 13(2): 67-73. https://doi.org/10.11821/yj1994020010
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    Following teh suitability classmcation concepts and the suitability classification structure proposed by FAO(1976,1983),an exercise was carried out to establish a suitability evaluation system for various rural purposes in New South Wales,This system provided a method to obtain the suitability classifications for specific rural purposes based on soil survev information(attscales between 1:50,000 to 1:500,00).Following the parametric approach,after the assesment of each land characteristic according to its influence to land use,the limitatione Hects of the land as a whole needs to be estimated.A limitation scoring method was derived in this study to quantitatively determine the suitability classes of land for specific purposes.The limitation effect of a specific land characteristic is quantitatively expressed by limitation score,and the overall limitation effects of the land as a whole are expressed by accumulated limitation score which is the summation of the limitation scores of all land characteristics,A close relationship between the accumulated limitation scores and the land use suitability classes was found.The accuracy of the results obtained by using this method was found to be at an acceptable level.
  • VERTICAL DISTRIBUTION OF SOIL ANIMAL ON THE JIUHUA MOUNTAIN
    Lu Youcheng, Wang Zongying
    1994, 13(2): 74-81. https://doi.org/10.11821/yj1994020011
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    From May,1986,to December,1992,We investigated Soil animals in 4 habitat types in the Jiuhua Mountain for seven times.16608 soil animals have been collected They belong to 5 phyla 13 classes 37 orders and 95 Families.Among them,Acarid,Collembola and Nematoda are dominant genera which account for 74.41%of the total collected population,The rules of vertical change in soil animal community are:Except Community Ⅰ which is mostly affected by human activities the group number increases with the increase of sea-level elevation and organic matter the individual number (N)and density(D)of middle and small soil animals decrease with the increase of sea-level elevation and the decrease of temperature;Shannon's indices(H)of communities are Ⅳ>Ⅲ>Ⅱ>Ⅰ,which are in accordance with the change of group number.The trend of the changes in S.D of each community and H.E of large soil animals is November>December>May>August.The indices of H and E of middle and small soil animals are contrary to those of large soil animals,which are May>August>December>November.The habitat condition is superior.community Ⅳ which hasthe most organic matter has the most narrow distribution pattern.Community Ⅰ which is mostly affected by human activities has no narrow distribution pattern community.
  • A COMPARATIVE STUDY ON CARTOGRAPHIC HISTORIES BETWEEN CHINA AND THE WEST
    Lü Huancheng
    1994, 13(2): 82-89. https://doi.org/10.11821/yj1994020012
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    The paper works out the "Chronology of Cartographic History of China and the west".The upper Limit is about 40,000-20,000 years ago when man began to use stones,branches to lay out the reduced models of residence surroundings and routes;the lower limit is 1911 when the Revolution of 1911 won victory.Before the 17th century the maps of Japan,Korea and Annan were deeply influenced by China and listed in the East Cartography.After the 17th century the west influence was very great and they were put into the west Cartography.Before 1911,the cartography of China remained at the forming stage of the modern maps.After that year,it entered the stage of the modern cartography.That is why the lower limit is set here.
  • A DISCUSSION ON THE MARKEY PLOTTING FUNCTION OF GEOGRAPHY RESEARCH
    Wang Yanping, Zhong Guiging
    1994, 13(2): 90-94. https://doi.org/10.11821/yj1994020013
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    Chinese economy is changing to market system from planned model. Many new problems will challenge Geographers. The market plotting function of Geography research can be one of the effective approaches to solve this kind of problems. "This study will not consider all factors in the evaluation in order to save time. In this way,the results can be put forward on time in order to get a chance of obtaining more profits.
  • Integration Marketing With Planning Tourism Destination
    1994, 13(2): 98-98. https://doi.org/10.11821/yj1994020015
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  • Spatial Decision Support Systems for the Site Selecting in Urban Planning
    1994, 13(2): 98-98. https://doi.org/10.11821/yj1994020016
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  • Modeling and Testing Water and Emergy Transfer in Soil-Vegetation-Atmosphere System
    1994, 13(2): 98-98. https://doi.org/10.11821/yj1994020017
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  • A study on land System in the Desrt stepp Region in Ningxia Hui Autonomous Region
    1994, 13(2): 98-98. https://doi.org/10.11821/yj1994020018
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  • Mass Transfer on and Across Ground Water/Surface Water Interface
    1994, 13(2): 98-99. https://doi.org/10.11821/yj1994020019
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