四川环境2013，Vol.32Issue(1)：39-45,7.
基于GIS/RS的地震灾区流域水土保持功能恢复效应评价
Assessment of Restoration of Soil and Water Conservation Function in Watershed in Earthquake Disaster Area Based on GIS/RS
摘要
Abstract
Soil and water conservation plays an important role in the maintenance of regional ecological security. Soil conservation function of Mountain Chaping region was badly damaged during "5. 12" Wenchuan earthquake. After four years, how the effect it recovery and change trend, are information that policymakers need urgently. The land-use maps of the small watershed in 2007, 2008 and 2011 including three periods before and after the earthquake were interpreted using TM image. Based on GIS and RS, using RUSLE model the quantity and intensity of soil erosion of the three periods were calculated respectively. Through the contrast, the restoration effect of soil and water conservation function was analyzed. The results showed that in the research area with 474. 41 km2, the total soil erosion in 2007 was 4. 061 x 105 t, and that in 2008 was 6. 997 x 105t, increasing than 2007 by 72. 30%. In 2011, the total amount of soil erosion was 6. 163 x 105 t, compared with that in 2008, the total amount of soil erosion decreased by 11. 92% , soil and water conservation function restored. By analysis it found that in three years before and after the earthquake, the area of every level of erosion intensity decreased with the increase of erosion intensity, which meant that there was no change of the soil erosion pattern during the periods of earthquake damage and restoration.关键词
地震/生态功能恢复/土壤侵蚀/RUSLE/GISKey words
Earthquake/ecological function restoration/soil erosion/RUSLE/GIS分类
资源环境引用本文复制引用
杨渺,谢强,谭晓蓉,刘孝富..基于GIS/RS的地震灾区流域水土保持功能恢复效应评价[J].四川环境,2013,32(1):39-45,7.基金项目
2011年国家环保公益性行业科研专项(2011467026). （2011467026）
