径流曲线数法在黄土高原地表径流量计算中的应用

被引:46
作者
罗利芳
张科利
符素华
机构
[1] 北京师范大学资源与环境科学系
关键词
径流; 径流曲线数法; 曲线数; 降雨侵蚀;
D O I
10.13961/j.cnki.stbctb.2002.03.017
中图分类号
S157.1 [水土流失的原因及其防治];
学科分类号
摘要
坡面径流是土壤侵蚀发生的基本动力 ,径流量计算是定量估算水土流失和进行水土保持效益评价的关键步骤。径流曲线数法是美国农业部开发的计算地表径流量的经验模型 ,它有使用简单、有效 ,且适用于资料匮乏地区等优点。介绍了径流曲线数法的基本原理和计算方法 ,并以陕西安塞 2 5个小区的降雨径流资料 (次降雨 )为基础 ,计算了黄土高原地区不同下垫面条件下的曲线数 (CN )值大小 ,并分析研究了 CN值和各影响因子间的关系 ,对该模型在黄土高原地区使用的有效性也进行了评定。
引用
收藏
页码:58 / 61+68 +68
页数:5
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