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[1]YANG Guo-qing,LI Yue-chen.Analysis of Spatial-temporal Distribution of Land Use Patterns of Small Drain Basin Based on RS and GIS—A Case Study for Luoyugou Basin,Tianshui City, Gansu Province[J].Research of Soil and Water Conservation,2009,16(06):194-199.

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Analysis of Spatial-temporal Distribution of Land Use Patterns of Small Drain Basin Based on RS and GIS—A Case Study for Luoyugou Basin,Tianshui City, Gansu Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 06 Page number: 194-199 Column: Public date: 2009-12-20

Title:: Analysis of Spatial-temporal Distribution of Land Use Patterns of Small Drain Basin Based on RS and GIS—A Case Study for Luoyugou Basin,Tianshui City, Gansu Province

Author(s):: YANG Guo-qing^1,2,1,2, LI Yue-chen³; 1. College of Geographical Science, Chongqing Normal University, Chongqing 400047, China;
2. College of Geography Science, Key Laboratory of GIS Application, Chongqing Normal University, Chongqing 400047, China;
3. North China Institute of Water Conservancy and Hydropower Power, Zhengzhou 450011, China

Keywords:: RS; GIS; land use; Luoyugou basin

CLC:: F301.24

DOI:: -

Abstract:: Taking the 1986 vector form based land detailed survey database and the 1990, 1995, and 2001 satellite data as information resources, this paper discussed the land-use and land-cover change of Luoyugou basin located in Tianshui city, Gansu Province.Based on the spatial analysis techniques supported by Arc/Info software and other mathematical statistical methods, this paper analyzed the spatial-temporal change characteristics of land use in the small watershed, revealed the major patterns and trends of land use and land cover change, the use of land-use dynamic degree of land-use change and the direction of the transference of land-use types and speed. The results show that the major land covers in the watershed are farmland and forestland which account for more than 80% of the whole area in the past 11 years. The basin of the comprehensive land-use dynamic degree is 0.23% from 1990 to 1995, and 1.09% from 1995 to 2001 and 0.89% from 1990 to 2001. The transference of land-use types of the main direction is to the forest land, which accounts for 86.82 % of the total change area. Secondly, at the turn of grass land, grass land accounts for 10.93% of the total change area. Last but not least, cropland accounts for 1.183%and the virgin land accounts for 1.060%.The conversions of cropland to forest, cropland to grassland are the major patterns of land use change. Which the average annual rates of conversion are 35.67 hm² and 3.41 hm². The average annual rates of conversions of the virgin land to forest, the virgin land to the grassland are 6.09 hm² and 1.77 hm²; The average annual rate of conversions of the riverbed land to forest land is 5.31 hm²; There are other types of conversion which the average annual rate is much smaller.

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