降雨条件下坡面径流泥沙起动流速研究  

Study on sediment incipient velocity of slope runoff under rainfall condition

作　　者：韩浩[1] 高建恩[1] 梁改革[1] 孟岩[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,中国科学院水利部水土保持研究所,国家节水灌溉杨凌工程技术研究中心,陕西杨凌712100

出　　处：《人民长江》2010年第12期49-54,共6页Yangtze River

基　　金：“十一五”国家科技支撑计划项目(2006BAD09B01,2006BAD01B04-02);国家水专项(2009ZX07212-002-003-02);国家自然科学基金项目(50809056,40701092)

摘　　要：针对降雨条件下坡面径流泥沙起动规律研究中存在的问题,在前人研究的基础上,将雨滴侵蚀力引入到降雨条件下坡面径流泥沙起动受力分析过程中,建立了降雨条件下坡面径流均匀沙起动公式,进行了典型试验,并利用已有资料和典型试验资料进行了验证。结果表明,在降雨条件下坡面径流泥沙起动研究中考虑雨滴侵蚀力的作用是合理的,且给出的公式可用于降雨条件下坡面径流及河川径流泥沙起动流速的计算。Aiming at solving the problem in studying sediment incipient velocity of slope runoff under rainfall condition,we establish a formula for calculating sediment incipient velocity of uniform sediment on slope runoff under the rainfall condition,by introducing the raindrop erosion force into the incipient force analysis process of slope runoff sediment,and carry out a typical experiment and verify it by the existing and the typical experimental data.The results show that it is reasonable to take raindrop erosion force into consideration in the sediment incipient velocity of slope runoff under rainfall condition;and the proposed formula is suitable for calculating the sediment incipient velocity of slope runoff and river runoff under the rainfall condition.

关 键 词：降雨径流 坡面 起动流速 均匀沙 

分 类 号：TV142.1[水利工程—水力学及河流动力学]