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。
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.
出处
《水利学报》
EI
CSCD
北大核心
2010年第7期870-875,共6页
Journal of Hydraulic Engineering
基金
教育部重点项目(109149)
国家863计划项目(2006AA100204
2006AA100223)
旱区现代节水农业技术创新引智基地(111-2-16)
黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目(10501-206)
关键词
径流调控
放水冲刷
水沙输出过程
水沙效应
runoff regulation
scouring experiment
runoff-sediment export processes
runoff and sediment reduction
