摘要
分析了延安燕沟流域近年来的降雨观测资料以及野外人工降雨试验数据,结果表明,燕沟流域年均输沙量比治理前的1997年减少了80%以上。在造成输沙量减少的原因中,降雨因素影响约占30%,而以植被建设为主的水土保持措施影响约占70%,证明植被恢复在流域综合治理中占有重要地位。
Through the analysis of observed data of natural and simulated rainfalls in recent years in Yan＇gou watershed, Yan＇an City, it is concluded that annually averaged sediment yield decreases by more than 80% in comparison with the case before control. Among the factors causing decreased sediment yield, the contribution by rainfall makes up about 30%, while the contribution by the soil and water conservation measures dominated by vegetation construction, about 70%. The result proves the importance of vegetation restoration in comprehensive watershed management measures.
出处
《水土保持通报》
CSCD
北大核心
2008年第1期10-13,共4页
Bulletin of Soil and Water Conservation
基金
国家科技支撑计划项目(2006BAD09B05)
国家重点基础研究发展计划(2007CB407205)
国家基金委重点课题(90502007)
关键词
黄土丘陵区
植被恢复
降雨
减沙效益
the Loess Plateau
vegetation restoration
rainfall
effect of sediment reduction
