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  • 1996 Volume 15 Issue 1
    Published: 15 March 1996
      
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  • AN AUTOMATED SOLUTION TO THE GRAPHIC GENER ALIZATION OF DISCONTINUOUS AREA PHENOMENA
    Qi Qingwen, Liu Yue
    1996, 15(1): 1-10. https://doi.org/10.11821/yj1996010001
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    In this paper,some principles of automated generalization on the discontinous area phenomena-were discussed,followed by the strategies of auto-generalization.Furthermore,the authors expounded the algorithms of every operation of the figure auto-generalizatio of areapatch,i.e.,selection/elimination,simplification,exaggeration,displacement,and aggregation.Finally,the implementation methods of the above algorithms,and the operational workflows of a few cartographic feature,were reported.
  • ESTIMATING AGES OF LANDFORMS BY ANALYSING ROCK-WEATHERING RINDS
    Li Baojun, Yang Jingchun, Li Youli, Tan Lihua, Duan Fengjun, Zhang Yechun
    1996, 15(1): 11-21. https://doi.org/10.11821/yj1996010002
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    Quantitative studies of the relation between weathering and time suggest that the rates of most weathering processes decrease with time. Some weathering processes appear to conform to exponential function of time.Based on this theory,we can estimate ags of landforms based on the analysis of rock-weathering rinds.This relative-dating method has been used for several decades since 1966.Recent studies of weathering-rinds on sandstones in the middle of Hexi Corridor in western China suggest this method is applicable.The authors have reviewed the development of this technique.
  • A PRELIMINARY STUDY ON THE CHARACTERISTICS OF FLOODS IN HUAIHE RIVER BASIN
    Zhou Yinkang
    1996, 15(1): 22-29. https://doi.org/10.11821/yj1996010003
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    On the basis of the" atlas of yearly dryness/wetness in China for last 500-year period",the time series of floods in the Huaihe River Basin during 1470-1991 are established according to the flood index which considers the contribution of different flood area and different flood grade. Some characteristics of floods including statistical features, time series features and fractal features in the Huaihe River Basin for the last 500-year period are analysed according to the flood series. The analysis shows that the floods in the Huaihe River Basin have a relatively high frequncy and also have the features of simultaneous occurrence and successive occurrence.They have the periods with different time spans which are about 460-year,150-year and 60-80 years and some shorter time span oscillations.They also have time fractal featues in some scalling ranges. The time fractal dimension is decreasing with the increasing of the flood grade.It is inversely proportional to the periods of floods and may become an importment parameter in the study of floods.
  • DANWEI-BASED CHINESE CITIES’ INTERNAL LIFE-SPACE STRUCTURE─A CASE STUDY OF LANZHOU CITY
    Chai Yanwei
    1996, 15(1): 30-38. https://doi.org/10.11821/yj1996010004
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    The purpose of this paper is to clarify the internal life-space structure in Chinese cities,by a case study of Lanzhou,the capital city of Gansu Province.A special attention is paid to DANWEI(or working unit),a principal territorial form of the urban life in Chinese cities.The formation,the roles,the daily-life patterns,and the distributive characters of DANWEI are considered.It is clarified that the internal life-space structure in Chinese cities is composed of three levels(Fig.4):the basic life-space as DANWEI,Which is related to both the works and residences of the citizens,and influences on the urban land-use pattern as well as the social area structure;the low-level life-space which is composed of the homogeneous DANWEI; the high-level life-space which is the Municipal District.This internal life-spacestructure in Chinese cities is formed through the administrative control and the residentialPlan of the Municipal Bureau(Fig.5).
  • HYDROLOGICAL AND SEDIMENTARY ENVIRONMENT AND POLLUTANT TRANSPORT OF THE SOUTH CHANNEL IN THE CHANGJIANG ESTUARY
    Pan Dingan
    1996, 15(1): 39-46. https://doi.org/10.11821/yj1996010005
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    The water area of the South Channel is wide,the volume of the water body is large,thedynamics is strong,and the content of suspended sediments is higher.the sediments consist of fine-grained sediments mostly.The water has high capability of transporting,diluting and clearin.The pollutants of the South Channel are absorded mainly by sediments.They go there and back during empting to the sea.They are circularly transported and transported towards bottom,flats,flood channels,and accumulated at the places between the river and the sea.
  • PROCESS OF ECONOMIC DEVELOPING AND REGIONALFEATURES OF CHENGDE AREA DURING THE LATE 300 YEARS
    Han Maoli
    1996, 15(1): 50-57. https://doi.org/10.11821/yj1996010006
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    The developing of Chengde Area in modern ages arised under special historic backgrounds. The economic developing of this area was greatly prompted by large amounts of migrations out of the passes and the emerging of the Summer Mountain Mansion,which was the political center outside the Great Wall.The regional features and the process of economic developing in Chengde Area are studied In the two consequent stages with the clue of the rising and decli ning of summer Mountain Mansion. It is also elucidated that the declining of the Mansion had affected not only the economic development of Chengde City itself, but also the economic geographic appearance of the whole region.
  • DYNAMIC STATE OF THE BAR AT THE YELLOW RIVER MOUTH
    Ye Qingchao
    1996, 15(1): 58-65. https://doi.org/10.11821/yj1996010007
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    The development of the mouth bar is Influenced by the boundary conditions of the river mouth,runoff,oceanic power,sea level change and channel dredging. The mouth bar,taking shape of fan,is composed by closely compacted sands.In 1984-1987 in natural situation,the Yellow River mouth bar was over 7km in length,with its top at an elevation of -0.1m-0.5m,and it moved seaward at a speed of 1.30km/a.In 1988-1992,the mouth bar was dredged,its length decreased to 4-6km, and its top was at an elevation of -0.6m at an average,and the rate Of Progression was 1.26km/a; therefore the Pressure Of laborious flood control in the reaches of the river mouth was alleviated.
  • ON EXPERIMENTAL STUDIES OF CONTOUR HEDGEROW
    Li Xiubin, Shi Xun
    1996, 15(1): 66-72. https://doi.org/10.11821/yj1996010008
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    This paper discusses in detail the principles and methods for the design,management,and economic appraisal of contour hedgerow projects.The authors claim that functions of the designed hedgerow should be constrained to avoid contradictions between its ecological and direct economic benefits,hedge plant properties should be emphasized in species selection,the major Purposes of hedgerow management are to promote hedge formation and to minimize negative effects of hedgerow on field crops,a cost/benefit analysis Is appropriate for both ecological and economic assessments of contour hedgerow projects.
  • A STUDY ON METHODS OF EXTRACTING REMOTE SENSING INFORMATION FEATURES OF THE HOLOCENE TRANSGRESSION TRACES
    Zhao Yingshi, Yang Yi
    1996, 15(1): 73-81. https://doi.org/10.11821/yj1996010009
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    In this paper,the integrated analysis of multi-spectral,and multi-temporal remote sensing image data(TM,MSS,NOAA/AVHRR) and geoscience data(geomorphological, hydro-geological,lithofacies,archaeological) have been carried out to identify paleo-coastal lines since the Holocene Epoch in the eastern part of North-China plain. The emphasis of the study is placed on the utilization of Information reflecting spatial distribution of salt groundwater and changes of water chemical components,which are closely related to paleo sea transgression and are reflected by environmental factors such as water,heat,salt,soil and vegetations.Some image processing methods are used,so as to better reflect the combined landscape features of soil salinization-vegetation-landuse-geomorphy.Further,integrated processing for images concentrating thematic informations has effectively enhanced the differences of landscapes,for two sides of transgression boundary in the Holocene Epoch.Finally,supported by GIS,a variety of thematic maps are digitized.On the basis of spatial registration,an integrated dataset is generated and used for synthetical analysis for defining and verifying the paleo-coastal lines.
  • GEOCHEMICAL CHARACTERISTICS AND ENVIRONMENTAL SIGNIFICANCE OF THE WEATHERING QUATERNARY REDEARTH CRUSTS IN THE NANNING AND BAISE BASINS IN THE ZHUANG AUTONOMOUS REGION OF GUANGXI
    Gao Liuqing, Yuan Baoyin
    1996, 15(1): 82-90. https://doi.org/10.11821/yj1996010010
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    Based on a great amount of chemical analytical data of the Natong weathering redearth curst in the Nanning basin and the Jiangze Weathering redearth Curst in the Baise basin in the Zhuang Autonomous Region of Guangxi,this paper carried out a comparative research on the confirmation,formation,distribution and soil fertility of the Quatarnary redearth and the characteristics of the two weathering cursts by using the indices got from the intensity of geochemistry and the coeffients of silica ferrite and silica alumina, and discussed the developmental process of the weathering curst and its impact on the environment.
  • A STUDY ON CHINESE FOLKLORE GEOGRAPHY
    Gao Zengwei
    1996, 15(1): 91-97. https://doi.org/10.11821/yj1996010011
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    Chinese folklore geography regarded as one of promising subjects in China. It is an endless and complicated development process.The paper summarizes three periods:ancient,modern and contemporary.It is a subject which studies Chinese folklore area system and the relationship with geographical environment.It is also an important branch of humanities geography,and is the subbranch of culture geography.It has some characters,such as area,synthesis,edge,history,variability and society.The purpose of studying Chinese folklore geography is to push society forward and to develop geography science.This subject studies not only the folklore characters and its evolution and the distributing principle of every nation and social group,but also the various relations between the folklore culture and geographical environment and the characters of folklore geographical area system.
  • AN ATTEMPT TO DISCUSS THE TYPES AND FEATURES OF THE FAMOUS HISTORICAL CULTURAL CITIES IN CHINA
    Li Muhan, Bao hongming
    1996, 15(1): 98-104. https://doi.org/10.11821/yj1996010012
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    This essay discusses the implications of famous historical cultural cities,indicates the characteristics of spatial distribution of famous historical cultural cities in China,sets forth the ways of classifying famous historical cultural cities. The essay divides ninety-nine famous historical cultural cities into six types.It also analyses the main characteristics of every type,discusses the roles and functions of famous historical cultural cities in protecting cultural relics,urban constrution on historic sites,development of tourism and civilization,and provides some suggestions to city construction and development of tourism.
  • A Theoretical and Practical Study on Man-System and Regional Sustainable Development
    1996, 15(1): 105-105. https://doi.org/10.11821/yj1996010013
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  • A Comprehensive Numerical Simulation and Computation on the Physics and Environment of Air-Water System in Taihu Lake Area
    1996, 15(1): 105-105. https://doi.org/10.11821/yj1996010014
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  • Study on China’s Real Estae Industry Development and Regulatory System
    1996, 15(1): 105-105. https://doi.org/10.11821/yj1996010015
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