基于RS的宝兴河流域LUCC变化分析

The Study of the Land-use Changes in Baoxing River Valley Based on RS

本文基于1994年LandsatTM、1999年的ETM+及2007年的ETM+遥感影像,在ENVI和ERDAS的支持下提取宝兴河流域的土地利用/覆被变化情况。引入土地利用类型的年变化率、综合土地变化动态度等指标,分析其原因及土地利用的时空变化特征和规律。研究结果表明:1994年到2007年,耕地主要集中在宝兴河流域的东南部平坝地区,呈逐年变少趋势,减少44.7%;林地主要分布在西北高山及中部地区,呈逐年增加的趋势,增加6.5%;草地主要集中在西北高山区,其变化为先减少后增加,总体减少19.3%。

Based on the LandsatTM data（1994）,ETM＋ data（1999） and ETM＋ data（2007）,land use and land cover in BaoXing river valley was extracted by the support of ENVI and ERDAS.By means of leading into the Land-use types＇s Year rate of change,dynamic changes in degrees to describe the indicators of dynamic changes in land use of space,this paper analyzes the causation and its spatial and temporal variation in land-use.The results show that,from 1994 to 2007,farmland mainly concentrated in the southeast region of BaoXing river valley,Showed a decreasing trend year by year,the reduction was 44.7%;Woodland mainly distribution in the northwest and central areas of the mountains,Showed a rising trend year by year,the rising was 6.5%;lawn mainly concentrated in the northwest of high mountain,it showed a first increase and then reduce trend and had a overall reduction of 19.3%.