黄土高原沟沿线的廊道防蚀效应探析

在分析黄土高原地区的沟沿线、沟沿线上下沟间地和沟谷地土壤侵蚀特征、小流域泥沙来源、坡沟侵蚀产沙关系的基础上,结合廊道的生态功能和以往的研究结果,认为在沟沿线的上部建立草灌与整地工程措施相结合的植物廊道,来拦蓄阻截沟间地的来水来沙,可使流域的土壤侵蚀量减少54．5%～77．0%。

Through the analyses of characteristics of gully thalweg and soil erosion in upland and gully land,sedi- ment sources in small watershed,sediment yield relationship between upland and gully and ecological functions of vegetation corridor,it is considered that vegetation corridor combined with land preparation measures may block runoff and sediment from upland and reduce the amount of soil erosion in a watershed by 54.5%～77.0 %.