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| Effect of soil conservation practice on runoff and sediment in upper reach of Guanting Reservoir |
| Fu Suhua1,Liu Baoyuan1,Lu Bingjun2,Yuan Aiping2,Wang Nan1 |
| 1.State Key Laboratory of Earth Surface Processes and Resource Ecology,School of Geography,Beijing Normal University,100875;2.Beijing Soil and Water Conservation Center,100038: Beijing,China |
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Abstract The benefits of runoff and sediment reduction and factor value for soil and water conservation measures were analyzed based on 58 rainfall events data(2001—2006) of fish pit(bare land),fish pit(Platycladus orientalis L.Franco),narrow terrace(bare land),narrow terrace(Castanea mollissima Blume) and tree pan(Castanea mollissima Blume).The results showed that the average benefits of runoff reduction of fish pit(bare land),fish pit(Platycladus orientalis L.Franco),narrow terrace(bare land),narrow terrace(Castanea mollissima Blume) and tree pan(Castanea mollissima Blume) were all more than 60%,and the corresponding annual benefits of sediment reduction were above 90%.The engineering measures factors for fish pit,narrow terrace and tree pan were 0.08,0.09 and 0.10,respectively.The biological measures factors for Platycladus orientalis L.Franco and Castanea mollissima Blume were 0.41 and 0.48,respectively.Rainfall amount had an important effect on benefit of runoff and sediment reduction and measures factors value.The results can be served as benefits evaluations of soil and water conservation and land resource management in upper reach of Guanting Reservoir.
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Received: 17 June 2008
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