摘要
水土流失分区是水土流失研究和水土保持管理的重要组成部分。笔者从云南省水土流失的基本情况分析入手,首先分析对比了1987年和1999年全省和六大流域水土流失的演变态势及其各侵蚀强度面积所占百分比,再以各区域不同的自然地理尤其是地貌、植被覆盖特点和陡坡耕地占耕地总面积的比例及所在区域农业人口密度,把全省分为7个水土流失自然区,并对每个自然区的水土流失现状、特点、趋势进行了分析。该研究对区域水土保持、生态环境建设和区域可持续发展有重要意义。
Dividing of soil-water erosive area is the main part in research on soil-water erosion and its conservation management. Starting from the basic condition analysis of soil-water erosion, the authors firstly compared the status of soil-water erosion of the six large basins in Yunnan province and analyzed its development from 1987 to 1999; then the areas of soil-water erosion under different erosion intensities were calculated. In combination with the physical geography characteristics especially landforms, vegetation cover characteristics, the proportion of steep farmland from total cultivated lands and the agricultural population densities of research areas, the authors divided Yunnan province into seven natural subareas of soil-water erosion. Further, the authors had analyzed the regional present situations, characters and tendencies of soil-water erosion.
出处
《中国沙漠》
CSCD
北大核心
2005年第3期442-447,共6页
Journal of Desert Research
基金
国家攀登计划项目(2000026)
中国科学院知识创新工程重要方向项目(KZCX3SW345)
云南省自然科学基金项目(2002C0015R)
云南省社会科学基金项目(K6050016)共同资助
