基于径流侵蚀功率的流域次暴雨输沙模型研究--以岔巴沟流域为例  

Prediction of Watershed Sediment Transport for Single Rainstorm Based on Runoff Erosion Power

作　　者：鲁克新[1] 李占斌[1] 李鹏[1] 鞠花[2] 

机构地区：[1]西安理工大学西北水资源与环境生态教育部重点实验室,西安710048 [2]西安理工大学理学院,西安710048

出　　处：《长江科学院院报》2008年第3期31-34,共4页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金资助项目(40771124);国家重点基础研究发展计划项目(2007CB407206)

摘　　要：流域次暴雨侵蚀产沙模型研究是国内外土壤侵蚀研究的重点领域之一。提出了基于径流深和洪峰流量模数两个流域次暴雨洪水特征参数的径流侵蚀功率的概念;利用岔巴沟曹坪水文站1959至1990年间历年实测的次暴雨洪水径流泥沙资料,系统研究了该流域次暴雨径流侵蚀功率与流域输沙模数之间的相关关系,建立和验证了基于径流侵蚀功率的岔巴沟流域次暴雨输沙模型。结果表明,岔巴沟流域次暴雨径流侵蚀功率与流域输沙模数之间具有极显著的幂函数相关关系;模型验证期的次暴雨输沙模数模拟值与实测值之间具有较好的一致性。A prediction model of rainfall erosion and sediment yield of a watershed for single rainstorm event is one of key study issues of soil erosion at home and abroad. On the basis of the two characteristic values of flood hydrograph, i.e. peak discharge modulus and runoff depth, the concept of watershed runoff erosion power for single rainstorm event was proposed. According to the historically observed data of runoff and sediment in single rainstorm event of Chabagou watershed during the period from 1959 to 1990, the correlation of runoff erosion power and watershed sediment transport modulus was systematically analyzed. Then, the prediction model Of sediment transport for single rainstorm event of Chabagou watershed based on runoff erosion power was established and validated. The results indicated that an extremely significant power function correlation existed between runoff erosion power and watershed sediment transport modulus, and the simulated values of sediment transport modulus from the established model for single rainstorm event during the period from 1981 to 1990 were in good accordance with the observed ones.

关 键 词：流域 次暴雨 输沙模数 径流侵蚀功率 模型 

分 类 号：S157[农业科学—土壤学]