| 吴淑芳,吴普特,宋维秀,卜崇峰.坡面调控措施下的水沙输出过程及减流减沙效应研究[J].水利学报,2010,41(7): |
| 坡面调控措施下的水沙输出过程及减流减沙效应研究 |
| Study on the outflow processes of slope regulated by works and its effects on overland flow and sediment reduction |
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| DOI： |
| 中文关键词: 径流调控 放水冲刷 水沙输出过程 水沙效应 |
| 英文关键词: runoff regulation scouring experiment runoff-sediment export processes runoff and sediment
reduction |
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| 中文摘要: |
| 为了了解坡面调控措施对其产流、产沙过程的减流减沙效应，通过坡面上方放水冲刷实验，研究不同放水流量下20?聚流坑调控措施和裸地坡面产流、产沙过程以及径流携带泥沙的作用机制，运用起流时间、调控度、产流速率、输沙率定性指标阐明了调控坡面减流减沙效应，建立了次降雨输沙模数与径流量之间的水沙关系。本研究提出了 “用水减沙比” 概念与计算式，定性描述了调控措施拦截的径流量与减少的侵蚀量之间的复杂关系，揭示聚流坑工程措施在调控坡面径流的同时对侵蚀产沙的影响机制。 |
| 英文摘要: |
| In order to investigate the effects of slope works on overland flow and sediment reduction，the variation of runoff，rate of sediment erosion，and mechanism of erosion were studied in a scouring experiment with different draw-off discharges from regulated slope and bare soil （control） plots with inclination 20 ?. The effect of slope works on runoff and sediment transport reduction in regulated slope was qualitatively analyzed by indicator of time and velocity of producing runoff，the rate of regulation，and sediment delivery rate，and eslablished the relationship between sediment delivery rate and runoff yield. This paper presents the concept and formula of sediment reduction with runoff，qualitatively details the complex relationship between runoff interception and erosion reduction，and reveals the mechanism of erosion and sediment delivery in the course of regulated runoff. |
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