Land Use /Land Cover Dynamic in Qiantang River Watershed:1985-2004

Land use/land cover dynamic is closely related to the social and economic development,resource utilization,environmental protection and ecology,etc.As the biggest river in Zhejiang province,the information of land use/land cover change in Qiantang River Watershed(QTW) is very important.Based on the interpretation of TM images in 1991 and 2004,and statistical data of land use in 1985,we analyzed the land use changes in QTW from 1985 to 1991 and from 1991 to 2004.Results showed that the areas of cultivated land,water and unused land decreased,while the areas of garden plot,residential and industrial land increased drastically;and the areas of woodland increased slightly.Using these land use change data,we analyzed potential driving factors,which could provide scientific basis for planning and management of land resource in the region.