SCS模型在小型集水区降雨径流计算中的应用

SCS MODEL APPLICATION ON CALCULATION OF SMALL WATERSHEDS RAIN RUNOFF

用SCS降水—径流模型对陕北、渭北多个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。该文还分析了模型参数与陕北、渭北土壤分区特征的关系 ,确定了陕北。

SCS model was applied to calculate runoff amounts of several typical small watersheds in Northern Shaanxi and Weibei. The results showed that SCS model, which describes the relationship of runoff with soil characteristics and land utilization, was simple to use and needed relatively few parameters for the calculation of water harvesting amount of small watersheds. The relationship between model parameters and soil characteristics was analyzed. The model patameters of different districts in Northern Shaaxi and Weibei were decided.