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降雨强度和坡度对粘黄土坡面片蚀的影响
盛贺伟1; 郑粉莉1; 蔡强国2; 孙莉英2
2016
Source Publication水土保持学报
Volume30Issue:6Pages:13-23
Abstract

通过设计2种降雨强度(90,120mm/h)和4个地表坡度(10°,15°,20°,25°)的模拟降雨试验,研究了
降雨强度和坡度对粘黄土坡面片蚀的影响。结果表明,试验条件下当降雨量相同时,降雨强度和坡度对径
流量的影响不显著,而对坡面片蚀量的影响非常显著。当降雨强度由90mm/h增加到120mm/h时,在相同
坡度条件下坡面片蚀量增加76.2%~128.0%;当坡度由10°变化到25°时,90mm/h和120mm/h两种降雨强
度坡面片蚀量分别增加29.3%~72.1%和1.8%~75.4%。在降雨历时相同时,降雨强度由90mm/h增加
到120mm/h可使相同坡度条件下坡面径流量和片蚀量分别增加19.5%~26.0%和103.8%~162.2%;当
坡度由10°增加至25°时,坡面片蚀量在90mm/h和120mm/h两种降雨强度下分别增加25.1%~67.4%
和1.8%~75.0%。降雨强度对稳定阶段坡度侵蚀速率的相对贡献大于82%,远大于坡度对稳定阶段侵
蚀速率的相对贡献。

Other Abstract

There are more literatures related to sheet erosion on the loess sloping and sand loess sloping,but
there are little information on sheet erosion on the clay loess sloping.Therefore,the purpose of this study
was to investigate effects of rainfall intensity and slope gradient on sheet erosion at the clay loess sloping by
using simulated rainfall.The experiment treatment included two rainfall intensities(90mm/h and 120mm/
h)and four slope gradients(10°,15°,20°and 25°).The results showed that under the same rainfall,effects of rainfall
intensity and slope gradient on runoff rate had no significant difference;while both of them on sheet erosion had
significant difference.Under the same slope gradient,when rainfall intensity increased from 90mm/h to 120mm/h,
the sheet erosion increased 76.2%-128.0%.As slope gradient changed from 10°to 25°under both of 90and 120
mm/h,the sheet erosion increased 29.3%-72.1%and 1.8% -75.4%,respectively.Under the same rainfall
duration,when rainfall intensity increased from 90mm/h to 120mm/h,the runoff rate and sheet erosion
increased 19.5%-26.0%and 103.8%-162.2%,respectively.A slope gradient shifted from 10°to 25°,the sheet
erosion under the both of 90mm/h and 120mm/h increased 25.1%-67.4%and 1.8%-75.0%,respectively.
The relative contribution of rainfall intensity to stable-stage sheet erosion rate was above 82%,which was
much higher than that of slope gradient.

Keyword降雨强度 坡度 片蚀 稳定阶段侵蚀速率 粘黄土
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8640
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室
2.中国科学院地理科学与资源研究所,陆地水循环与地表过程重点实验室
Recommended Citation
GB/T 7714
盛贺伟,郑粉莉,蔡强国,等. 降雨强度和坡度对粘黄土坡面片蚀的影响[J]. 水土保持学报,2016,30(6):13-23.
APA 盛贺伟,郑粉莉,蔡强国,&孙莉英.(2016).降雨强度和坡度对粘黄土坡面片蚀的影响.水土保持学报,30(6),13-23.
MLA 盛贺伟,et al."降雨强度和坡度对粘黄土坡面片蚀的影响".水土保持学报 30.6(2016):13-23.
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