文档介绍：密云水库上游水源保护林水土保持
效益的定量研究 3
冯秀兰
( 北京林业大学基础科学与信息工程学院, ,北京;第一作者女,35 岁,副教授)
张洪江
王礼先
( 北京林业大学水土保持学院, ,北京)
摘要该文对大面积水源保护林的水源涵养与防止土壤侵蚀效益进行了研究,并找到了一种切
实可行的定量评价方法,利用该方法对密云水库上游密云县境内 13 . 11 万 hm2 水源保护林的水源涵养与防止土壤侵蚀效益进行了定量评价. 结果表明:水源保护林具有较强的水源涵养能力
和防止土壤侵蚀能力. 与无林荒地相比,在 50 年一遇场暴雨情况下,有林地可使地表径流量减
少 38 . 8 % ,土壤侵蚀量减少 53 . 8 % ,年土壤侵蚀量减少 83 . 3 %. 关键词密云水库,水源保护林,水源涵养,土壤侵蚀,效益评价中图分类号 S715 . 7
Quantitative Evaluation of Effects of Water Conservation Forest on
Conserving Soil and Water in the Upper Stream of Miyun Reservoir
Feng Xiulan
( College of Basic Sciences and Info r matio n Engineering , Beijing Fo r . U niv. , , P. R. China)
Zhang Ho ngjiang
Wang Li xian
( College of Soil and Water Co nservatio n , Beijing Fo r . U niv. , , P. R. China)
ABSTRACT A p ractical met ho d fo r evaluating t he effect s of soil and water co nservatio n fo rest is
applied in Miyun Co unt y , t he upper st ream of Miyun Reservoir of Beijing. The result show s t hat t he fo rest has a great abilit y fo r co nserving soil and water in co nt rast to t he wasteland. U nder t he sto r m wit h t he f requency of every 50 years ,t here is 38 . 8 % reductio n in runoff ,53 . 8 % reductio n in soil ero sio n and 83 . 3 % reductio n in annual soil ero sio n .
KEY WO RDS Miyun Reservoir ,soil and water co nservatio n , soil ero sio n , soil and water co nser2
vatio n fo rest , effect s evaluatio n
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