坡面水土保持林地地表径流挟沙能力研究  

Sand carrying capacity by surface runoff on forested slope land.

作　　者：张建军[1] 毕华兴[1] 张宝颖[1] 

机构地区：[1]北京林业大学水土保持学院

出　　处：《北京林业大学学报》2003年第5期25-28,共4页Journal of Beijing Forestry University

基　　金：霍英东青年教师基金项目 (810 2 6 );"十五"国家攻关项目 (2 0 0 1BA5 10B0 10 1)共同资助

摘　　要：以晋西黄土残塬沟壑区刺槐林地、油松林地、草地、农地为研究对象 ,利用野外放水试验的方法 ,研究了水土保持林对坡面径流的影响和坡面径流的挟沙能力 .结果表明 ,各地类径流的挟沙能力顺序为 :油松林地 <草地 <刺槐林地 <农地 .在分析各地类流速和泥沙含量的基础上 ,提出了各地类在一定流速范围内地表径流的挟沙能力 .同时利用统计分析提出了利用坡面流速计算侵蚀量的回归模型 .This paper focuses on the influence of soil and water conservation forest on slope runoff and the sand carrying capacity of surface runoff using field experiment. In this study, Robinia pseudoacacia forestland, Pinus tabulaeformis forestland, grassland and farmland on the loess plateau of western Shanxi Province were selected as research sites. The result shows that forest and grass impact on surface runoff sand carrying capacity to some degrees. The influence sequence (from strong to weak) is Pinus tabulaeformis, grass, Robinia pseudoacacia, and farmland. Based on the analysis on the relationship between surface runoff sediment concentration and flow velocity, the surface runoff sand carrying capacity in fixed flow velocity is computed. Also, the regression model of soil erosion and runoff velocity is developed by statistics method in this paper.

关 键 词：挟沙能力 地表径流 水土保持林地 黄土区 

分 类 号：S715.3[农业科学—林学]