密云水库上游典型水保措施减少面源污染效益分析

Analysis on Benefits of Area-Source Pollution Reduction through Typical Soil and Water Conservation Measures Conducted in Upper Stream of Miyun Reservoir

根据2005年8月10日至16日密云水库上游北京市境内的几次大范围降雨，通过坡面水土流失监测小区观测数据。推算此次大范围降雨造成的水土流失与典型水保措施减少面源污染效益。研究结果表明：水库上游典型水保措施的保土效益迭62．7％。减少污染物流失效益在25％-40％之间；典型水保措施在减少入库泥沙、减少进入水体的污染物等控制面源污染和保护水源方面发挥了显著的作用。

The paper calculates the soil and water loss caused by the events of precipitation happened in a large scale in the upper stream of Miyun Reservoir on August 10~16, 2005 and the benefits of reduced area-source pollution through typical soil and water conservation measures based on the observed data of monitoring slope plots. The study outcomes show that the soil conservation benefit gained through typical conservation measures for the upper stream of Miyun Reservoir is 62.7% and benefit of pollutant loss reduction between 25%~40% and; the typical measures exert remarkable function on the aspects of area-source pollution control and water source protection.