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[1]LIU Min-hong,HE Zheng-wei,JIANG Lan,et al.Application of Space Lorenz Curve in Land-use and Its Changes——A Case Study of Chengguan District of Lhasa, Tibet[J].Research of Soil and Water Conservation,2010,17(01):228-231.

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Application of Space Lorenz Curve in Land-use and Its Changes——A Case Study of Chengguan District of Lhasa, Tibet

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 01 Page number: 228-231 Column: Public date: 2010-02-20

Title:: Application of Space Lorenz Curve in Land-use and Its Changes——A Case Study of Chengguan District of Lhasa, Tibet

Author(s):: LIU Min-hong^1,2, HE Zheng-wei^1,2,3, JIANG Lan^1,2, QIU Wen-xia^1,2, ZHANG Chuan-hong^1,2; 1. State Key Laboratory of Geohazard Prevention & Geoenvironment Protection, Chengdu, 610059, China;
2. Geosciences College, Chengdu University of Technology, Chengdu, 610059, China;
3. Key Laboratory of Resource Environment and GIS in Beijing, Capital Normal University, Beijing, 100037, China

Keywords:: Space Lorentz Curve; land-use; centralization index

CLC:: F301.24

DOI:: -

Abstract:: At present,scholars tend to use many kinds of index models to study land- use,this article attempts to adopt a new approach-space Lorenz curve-to display the distribution of land-use and its changes more intuitive and more concisely.In this paper,remote sensing and GIS technology are used to map the Lorenz curve of land-use distribution on elevation bands of 1991,2000 and 2005 in the Chengguan District of Lhasa,Tibet.On the basis of that,we calculate Centralization Index of each land-use type.The results show that the Lorenz curve demonstrates intuitively that in study area,there are little changes in distribution degrees of land-use on elevation bands from 1991 to 2005.Among these,the most uniform distribution is grassland,and the most concentrated ones are woodland and construction land.Centralization Indexes based on the Lorenz curve show further and more accurately the degree of distribution of land use changes:the concentration degrees of arable land and grassland experienced the process of first dropped and then raised;the concentration degree of water first increased and then decreased;the distribution of unused land on elevation bands becomes more and more concentrated;the degrees of distribution of forest land and construction land were unchanged.

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