期刊论文

Effects of Rainfall Intensity and Slope Gradient on Runoff and Sediment Production and Erosion Dynamic Process on Red Soil Slope

中文

水土保持研究

1005-3409

2020

27

6

1-8

10.13869/j.cnki.rswc.20200611.001

国家自然科学基金(41907061,41701323) 长江科学院水利部山洪地质灾害防治工程技术研究中心开放基金(CKWV2019761/KY) 黄土高原土壤侵蚀与旱地农业国家重点实验室基金课题(A314021402-2005)。

本校为第一机构

采用人工模拟降雨试验,研究不同雨强(40,66,80 mm/h)和坡度(5°,10°,15°)条件下,湖北省武汉市蔡甸区红壤坡面流速、产流产沙时空变化及水动力学过程。使用长2.5 m,宽0.5 m,高0.3 m的可调坡度径流土槽,每场降雨试验在槽子底端出口开始产流后持续60 min,每3 min收集一次径流泥沙样品。结果表明:相同坡度下,坡面平均产流率和产沙率均随雨强增加而增大;产流率在降雨初期波动增长,随降雨时间延长而逐渐稳定;产沙率在降雨初期急剧上升,随后稍有下降并逐渐趋于平稳。坡度从5°增加到15°,雨强为40,66,80 mm/h下的平均产流率依次增加24%,22%和15%,平均产沙率依次增加89%,60%和84%。随雨强或坡度增加,流...

The overland flow velocity,temporal and spatial variations of runoff and sediment yield,and hydrodynamic processes on the red soil slope in Caidian,Wuhan,Hubei Province were studied under different simulated rainfall intensities(40 mm/h,66 mm/h,80 mm/h)and slope gradients(5°,10°and 15°).The soil sample was filled in a steel trough(2.5min length,0.5min width,and 0.3 min height)with adjustable slope gradient.Each rainfall simulation lasted for 60 minutes after the generation of runoff at the outlet of the trough,and runoff and sediment samples...