摘要
采用人工模拟降雨的方法,对仪器自身性能进行了测试,并分设5种不同的降雨强度分别研究半干旱区林地、草地、人工草地和耕地的产流产沙特征。模拟天然降雨最大雨强5.05 mm/min,雨量118.2-300.3 mm/h;雨滴落地速度、雨滴动能等降雨特征值与天然降雨特征值是一致的;不同立地条件下径流量、侵蚀模数随雨强的增加而增加,并与降雨强度呈指数函数或幂函数关系。
The characteristics of rainfall simulator devices and sediment and yield runoff on farmlands were studied by adopting artificial simulation of rainfall in the semi-arid area of Dingxi,Gansu province. 5 different rainfall intensities were divided. The results showed that the maximum rainfall intensity and the precipitation were 5.05 mm/min and 118.2-300.3 mro/h respectively. The water drop falling velocity, power and others rainfall characteristics were unanimous with natural rainfall. The farmlands runoff and soil erosion were increased with the exponential or the power function of the rainfall intensity.
出处
《水土保持研究》
CSCD
北大核心
2007年第2期16-18,共3页
Research of Soil and Water Conservation
基金
国家自然基金资助项目(39960052)
教育部骨干教师计划项目
中国科学院百人计划资助项目
关键词
人工模拟降雨
降雨强度
土壤侵蚀
产流产沙
artificial simulation of rainfall,rainfall intensity
soil erosion
sediment and yield runoff
