长江科学院院报2016，Vol.33Issue(2)：28-32,5.DOI:10.11988/ckyyb.20140682
三峡库区小流域降雨入渗和产流产沙特征试验研究
Rainfall Infiltration and Characteristics of Runoff and Sediment Yield in Small Watershed of Three Gorges Reservoir Area
摘要
Abstract
In Three Gorges reservoir area, concentrated rainstorm with short duration and high intensity is an impor⁃tant factor causing soil erosion. In the aim of investigating rainfall infiltration and characteristics of runoff and sedi⁃ment yield in small watershed of Three Gorges reservoir area, we establish a miniature model for the area and simu⁃late rainfall in the presence of different rainfall intensities(60, 90, 120 mm/h) to analyze rainfall infiltration of small watershed erosion and runoff process characteristics. Research results show that : 1) runoff yield increases with rainfall intensity, and the impact of rainfall intensity on increase of infiltration is effective only within a certain range;2) infiltration rate and runoff yield intensity gradually tend to be stable, infiltration rate is in agreement with law of logarithmic function, whereas runoff yield intensity varies according to power function; 3) relationship be⁃tween cumulative sediment yield and cumulative runoff in the three rainfalls can be fitted by power function, and there is a good linear relationship between sediment concentration and erosion yield. The results provide important scientific basis for the prevention and control of soil and water loss in the area.关键词
三峡库区/模拟降雨/小流域/降雨入渗/土壤侵蚀Key words
Three Gorges reservoir area/rainfall simulation/small watershed/rainfall infiltration/soil erosion分类
农业科技引用本文复制引用
梁永哲,夏振尧,牛鹏辉,许文年,陈毅..三峡库区小流域降雨入渗和产流产沙特征试验研究[J].长江科学院院报,2016,33(2):28-32,5.基金项目
国家自然科学基金项目（41202250，51278281）；三峡大学研究生科研创新基金项目 （）
