土壤学报2012，Vol.49Issue(4)：636-645,10.
基于景观破碎化的三峡库区(重庆)土壤侵蚀评价
ASSESSMENT OF SOIL EROSION OF THE THREE GORGES RESERVOIR REGION (CHONGQING) BASED ON LANDSCAPE FRAGMENTATION
摘要
Abstract
Based on the principles of landscape ecology, the Chongqing Section of the Three Gorges Reservoir Region was studied and analyzed for composition, intensity and spatial distribution of soil erosion, using the ArcGIS 9. 3 software and the Two-way indicator species analysis (TWINSPAN) and Detrended canonial correspondence analysis (DCCA) technique. In addition, the lands of the 22 districts and counties under Chongqing were classified according to fragmentation degrees of their landuse landscape, and the relations between the landscape fragmentation and the soil erosion were evaluated. Results show that light and moderate erosions were the main types in the study area. Farmlands were the highest in soil erosion intensity, woodlands, waterbodies and virgin lands were relatively lower, and the lower and middle reaches of the area were significantly higher than the upper reaches. Spatially, the 22 districts and counties could be ruled into three highly fragmented landuse landscape zones, i. e. agriculture-grassland zone, woodland zone and construction-land-waterbody zone, lined and decreased in soil erosion intensity from east to west. And higher grades of soil erosion intensified land-use landscape fragmentation, but when soil erosion reached its extremity, this effect of intensification showed a reverse trend, i. e. intensive soil erosion > highly intensive soil erosion > extremely intensive soil erosion.关键词
景观/破碎化/三峡库区/土壤侵蚀Key words
Landscape/ Fragmentation/ The Three Gorges Reservoir Region/ Soil erosion分类
管理科学引用本文复制引用
彭月,何丙辉,黄世友..基于景观破碎化的三峡库区(重庆)土壤侵蚀评价[J].土壤学报,2012,49(4):636-645,10.基金项目
国家林业公益专项(201004039)、重庆市林业科学研究院基金专项(BB1002)、西南大学博士后启动基金(207178)、国家自然科学基金项目(40971166)和国家科技支撑计划项目(2009ZX0)资助 （201004039）
