三峡库区土地利用时序变化遥感监测与分析

三峡工程的建设在带来巨大综合效益的同时，也对库区的生态环境造成了一定程度的影响，引起了人们的广泛关注。选取库区20世纪70年代末至2005年近30年共5个时间序列(1977、1988、1995、2000、2005年)的Landsat TM或MSS 影像，对整个三峡库区的土地利用时序变化进行了动态遥感监测，并根据已有的2000年土地利用现状数据及各时段的变化监测结果，利用ARCGIS的空间分析功能，获取其它各期的土地利用现状数据，在此基础上，利用多种特征指数，从不同侧面研究与分析了三峡库区近30年来土地利用时空变化的特征，以期对三峡库区的环境保护、土地利用管理与规划提供依据与参考。

MONITORING THE LAND USE DYNAMICS AND ANALYZING ITS CHANGE IN TIME SERIES USING IMAGERY IN THREE GORGES RESERVOIR AREA

The Three Gorges Project will bring us great benefits;at the same time,it may cause some harm to the environment,which has attracted scholars' attention.In this paper,we monitored the land use change using Landsat TM and MSS imagery in Three Gorges Reservoir Area from 1970s to 2005,which were di- vided into five special historical periods:the end of 1970s,the end of 1980s,1995,2000 and 2005.Based on the known land use data of 2000 and the change detection result,utilizing ARCGIS spatial analysis soft- ware,we obtained other times land use data.Using these monitoring data we studied the spatial-temporal changes of land use for 5 different periods in several indexes.It is hoped that this work can help to protect the environment,land use and land layout in Three Gorges Reservoir Area.