川中丘陵区紫色土坡耕地产流特征试验研究  

Experimental Study on Runoff Characteristics of Slope Land in Sichuan Basin

作　　者：王先拓[1] 王玉宽[1] 傅斌[1] 王勇强[1] 王道杰[1] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所

出　　处：《水土保持学报》2006年第5期9-11,19,共4页Journal of Soil and Water Conservation

基　　金：中科院知识创新项目〔KZCX3-SW-330〕;国家973项目(2003CB415202)

摘　　要：通过人工模拟降雨方法对四川盆地紫色土坡耕地产流特征进行研究，得到以下结论：（1）在大雨强情况下，起始产流时间受坡度影响不明显；在小雨强时，起始产流时间随坡度的增加而缩短。小雨强下坡度对起始产流时间的影响可用幂函数表示，相关性显著。（2）裸地径流强度明显大于农地，且变化剧烈；（3）大雨强下坡度对径流系数的影响显著，并存在临界坡度：裸地介于10°～15°，农地约为20^。It studied runoff characteristics on purple soil slope land in Sichuan basin by using simulated rainfall method. The results showed that under high rainfall intensity, the influence of slope gradient on rainfall runoff duration was not apparent. Rainfall runoff duration would increase obviously if the slope gradient reduced when the rainfall intensity was low, and their relationship might be described by a power function. The runoff intensity of bare land was stronger than that of farmland, and the runoff change rate of bare land varied acutely along with the process of rainfall. Slope showed much more influence on coefficient of runoff under high rainfall intensity. It was concluded that the critical slope gradient of bare land runoff was between 10°-15°, and that of farmland was about 20°.

关 键 词：人工模拟降雨 紫色土 产流特征 起始产流时间 临界坡度 

分 类 号：S157[农业科学—土壤学]