川中丘陵区侵蚀产沙的尺度单元及其研究方法  

Multi-scale Methods for Soil Erosion Assessment in Hilly Regions of Middle Sichuan Province

作　　者：贺秀斌[1] 张信宝[1] 文安邦[1] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所,四川成都610041

出　　处：《水土保持通报》2004年第3期18-20,共3页Bulletin of Soil and Water Conservation

基　　金：973项目(2003CB415200);中国科学院知识创新工程项目(KC-330);中国科学院水利部成都山地灾害与环境研究所创新前沿项目

摘　　要：川中丘陵区地表以紫色沙页岩风化形成的紫色土壤为主,基岩风化剥蚀过程与流失过程交替进行.该区垦殖率高,植被盖度低,地形破碎,土地利用结构复杂,土壤侵蚀严重。根据川中丘陵区的景观特征和土地利用格局,认为地块应为该区土壤侵蚀研究的基本单元;探讨了在不同尺度单元上开展土壤侵蚀监测、评价和预测预报的方法。Soil in hilly regions in the middle of Sichuan Province is mainly a type of purple soil which has been developed from the purple shale rock. The vegetation cover is scattered, and the steep slopes are intensively cultivated, leading to severe soil erosion. In addition, the land use pattern is very complex. The present paper introduced a conception of land block as basic unit for erosion monitoring and the potential multi-scale method for erosion assessment on different spatial scales.

关 键 词：川中丘陵 土壤侵蚀 尺度单元 地块 支毛沟 

分 类 号：S157.1[农业科学—土壤学]