半湿润半干旱地区降雨径流关系的区域规律

以陕西地区汉江流域、渭河流域、北洛河和延河流域等15个典型的半湿润半干旱流域为例,分析了各流域的P+P_a-R相关关系,并对其产流规律的区域性进行探讨。研究结果表明,陕西地区汉江、渭河、北洛河和延河流域的P+P_a-R相关图后半部分与45°直线的夹角总体上呈逐渐增大的趋势,且大多数子流域为混合产流,大部分流域的P+P_a-R相关图的后半部分与45°直线有一定的夹角,其中志丹流域和杏河流域超渗产流占主导,P+P_a-R相关图较一致,但均严重偏离45°线。

Regional Patterns of Rainfall-Runoff Relationship in Semi-humid Semi-arid Areas

The typical 15 semi humid semi-arid watersheds in the Hanjiang River Basin, Weihe River Basin, Beiluo River and Yanhe River Basin in Shaanxi Province were taken as research objective. The relationship of the P+Pa-R in these watersheds was analyzed and the regionalization of the runoff was discussed. It is found that most of the sub-basins in Shaanxi Province are mixed runoff regions, and the upper part of the P+Pa-R correlation map has a certain angle with the 45°straight line, among which the infiltration-excess runoff production in the Zhidan basin and Xinghe River Basin dominated, the graph is consistent with a serious deviation from the 45°straight line.