坡度与降雨强度对坡面侵蚀产沙过程影响的试验研究  

Experimental Study on Influence of Slope and Rainfall Intensity on Surface Erosion and Sediment Yield

作　　者：葛金金 杨加智[2] 詹美礼[1] 戴爽[3] 盛金昌[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]中国电建华东勘测设计研究院有限公司,浙江杭州310014 [3]沂沭泗水利管理局,江苏徐州221018

出　　处：《水电能源科学》2015年第2期101-104,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51079039;51009053)

摘　　要：鉴于坡度和降雨强度的变化对坡面侵蚀产沙过程影响明显,通过设计室内大型试验土槽,采用室内人工模拟降雨的方法,对不同坡度和降雨强度下坡面侵蚀输沙动态过程进行试验研究。结果表明,在降雨强度不变的条件下,累计产沙量、输沙率随坡面坡度增大而增大;同一坡度下累计产沙量、输沙率随降雨强度的增加而增加;输沙率与降雨强度呈线性关系,与坡度呈幂函数关系。进而基于试验结果,通过二元非线性回归,建立了输沙率、单位面积单位时间产沙量、坡度及降雨强度之间的经验公式。The variation of slope and rainfall intensity have significant impact on the process of slope erosion and sediment yield.Combined with artificial rainfall simulation,a large indoor soil-slot is built to investigate the dynamic processes of slope erosion and sediment yield under different slope and rainfall intensity.The results show that under condition of constant rainfall intensity,the cumulative sediment yield and sediment transport rate increase with the increase of slope;for the same slope,the cumulative sediment yield and sediment transport rate increase with the increase of rainfall intensity.The sediment transport rate is linear relation with rainfall intensity and it is power function relation with slope.Based on experiment results,the empirical formula between sediment transport rate,sediment yield of unit area in unit time,slope and rainfall intensity are obtained by using binary non-linear regression.

关 键 词：坡面侵蚀产沙过程 坡度 降雨强度 试验 

分 类 号：P333.5[天文地球—水文科学]