水土保持学报2013，Vol.27Issue(3)：1-8,76,9.
模拟降雨条件下弃土堆置体侵蚀产沙试验研究
Experimental Study on Soil Erosion and Sediment Yield of Spoilbank Under Simulated Rainfall Condition
摘要
Abstract
Based on the field investigation and generalization of the development construction project of spoilbanks,according to generalized results,four different types of spoilbanks were selected as research objects.The soil erosion and sediment yield process of four types were simulated in indoor rainfall experimental condition.The results were given in the following,the infiltration rate and sediment concentration of all spoilbanks decreased in a fluctuating tendency with the rainfalls time,while the runoff rate increased in a fluctuating tendency with the rainfalls time.The variation of erosion sediment and transport rate appeared in two types with the rainfalls time,which were smooth and multimodal distribution.Runoff generation time had a negative exponent relation to rainfall intensity.Rainfall intensity had a linear function with average runoff rate,average erosion sediment and transport rate,respectively.Average sediment concentration had exponential function relation to rainfall intensity,while total sediment yield and runoff volume accorded with linear correlation.The type of rolling compaction by construction machinery at the top of slope had the shortest runoff generation time and lowest average infiltration rate in all design conditions of rainfall intensity.The total sediment yield increased 2.58 times with rainfall intensities increasing from 1.5 mm/min to 2.0 mm/min.Under the rainfall intensity with 2.0 mm/min and 2.5 mm/min,the average sediment ratio of runoff and average erosion sediment rate were higher than that of other spoilbanks and their difference was significant(P＜0.05).关键词
弃土堆置体/模拟降雨/降雨强度/径流/侵蚀Key words
spoilbank/ simulated rainfall/ rainfall intensity/ runoff/ erosion分类
农业科技引用本文复制引用
赵暄,谢永生,王允怡,景民晓..模拟降雨条件下弃土堆置体侵蚀产沙试验研究[J].水土保持学报,2013,27(3):1-8,76,9.基金项目
水利部公益性行业科研专项(201201048,201201047) （201201048,201201047）
