小型集水区降雨径流计算模型研究

Research on SCS Model of the Small Watershed Rain Runoff Calculating

用 SCS降水 -径流模型对陕北渭北多个典型小型集水区降雨径流量进行了分析与计算。结果表明 :SCS降水 -径流模型考虑了径流与土壤特性和土地利用情况的关系 ,简单易行 ,所需参数少 ,是一种较好的小型集水区径流计算方法 ,可用于小流域、沟道等小型集水区可集雨量的计算。还分析了模型参数与陕北、渭北土壤分区特征的关系 。

SCS model is applied to calculating runoff amount of several typical small watersheds of North of Shaanxi and Weibei . The result shows that SCS model, which describes the relationship between runoff and soil characteristics and land utilization, is simple and needs less parameters,and can be used for calculating water harvesting amount of small watershed. The relationship between model parameters and soil characteristics is analyzed. The model parameters of different districts of north of Shaanxi and Weibei is decided.