RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2007, Vol. 16 >> Issue (2): 181-181.

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DYNAMICS IN LAND USE AND ECOSYSTEM SERVICE—A CASE OF DANING RIVER WATERSHED IN THREE GORGES RESERVOIR AREA

ZHANG Baolei1, 2, ZHANG Shumin3, ZHOU Qigang1,2, ZHOU Wancun1   

  • Received:2005-12-19 Revised:2006-04-18 Online:2007-03-20

Abstract:

In this paper, the land use was classified into eight types, namely forest land, bush land, sparsevegetation land, water land, construction land and unused land. Using the remote sensing images as the data source, types of land use were autoclassified and manually interpreted, with the detailed analysis on the process and driving forces of the changes in land use of Daning River Watershed in the Three Gorges Reservoir Area. Then the ecosystem service value of each kind of land use was reevaluated based on the result of Costanza's evaluation,and the ecosystem service values of the Daning River Watershed over last 30 years were calculated. The results indicated that over the last 30 years, the trend of the change of land use in Daning River Watershed was that forestland, bush land, and grassland experienced process from destruction to restoration,the area of farmland increased from early 70s of last century and then decreased gradually,and the construction land expanded unceasingly. The ecosystem service has changed from a damaged process to a resuming process, with the value of ecosystem service decreased from 1973 to 1995 and increased from 1995 to 2002.

Key words: change of land use, ecosystem service, Daning River Watershed of Three Gorges Reservoir Area

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