Interactive effects of raindrop impact and groundwater seepage on soil erosion
文献类型：期刊论文
| 作者 | Liu, Gang2,3; Zheng, Fenli2,3; Jia, Lu2; Jia, Yafei1; Zhang, Xun-chang (John)4; Hu, Feinan2,3; Zhang, Jiaqiong2,3 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2019-11-01 |
| 卷号 | 578页码:8 |
| ISSN号 | 0022-1694 |
| 关键词 | Runoff Eroded aggregate size Rainfall simulation Soil loss Hydraulic parameters |
| DOI | 10.1016/j.jhydrol.2019.124066 |
| 通讯作者 | Zheng, Fenli(flzh@ms.iswc.ac.cn) |
| 英文摘要 | Raindrop impact (RI) and groundwater seepage (GWS) play important roles in slope erosion processes. However, reliable quantification of their interactive effects on erosion is still lacking. Therefore, a laboratory study was conducted to reveal the effects of RI and GWS on hillslope erosion. A soil box (5.0 m long, 0.5 m wide, and 0.5 m deep) was subjected to rainfall simulation experiments under free drainage (FD) and GWS conditions. The effect of RI was studied by dissipating raindrop energy, i.e. without raindrop impact (WRI). The results indicated that compared with WRI, RI increased the runoff rate, soil loss and sediment concentration by about 3-14%, 74-696%, and 64-560%, respectively. With a higher runoff rate of 27-54%, GWS increased soil loss and sediment concentration about 70-588% and 27-411% compared with FD, respectively. A power function relation were found between soil losses and runoff rate. The increasing rate of soil loss increased with runoff followed the order: GWS + RI > FD + RI > GWS + WRI > FD + WRI. The erosion and sediment yield seemed to be detachment-limited. As a result of crust formation, RI, compared with WRI, marginally enhanced the average flow velocity and shear stress, and reduced the resistance coefficient. The effects of GWS on flow parameters were more pronounced than RI. The mean weight diameter of aggregates was reduced by about 13-69% because of breakdown by raindrop impact or slaking. The loss of < 0.25 mm aggregate accounted for 77-98% of the total aggregate loss in all treatments. |
| WOS关键词 | SURFACE HYDRAULIC GRADIENTS ; SEDIMENT TRANSPORT ; OVERLAND-FLOW ; MECHANICAL BREAKDOWN ; LOESS PLATEAU ; LONG-TERM ; RAINFALL ; WATER ; DETACHMENT ; RUNOFF |
| 资助项目 | National Natural Science Foundation of China[41571263] ; National Natural Science Foundation of China[41761144060] ; National Key R&D Program of China[2016YFE0202900] ; International Partnership Program of Chinese Academy of Sciences[161461KYSB20170013] ; Innovative Talents Promotion Plan in Shaanxi Province[2017KJXX-83] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000497250200040 |
| 资助机构 | National Natural Science Foundation of China ; National Key R&D Program of China ; International Partnership Program of Chinese Academy of Sciences ; Innovative Talents Promotion Plan in Shaanxi Province |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/130552]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zheng, Fenli |
| 作者单位 | 1.Univ Mississippi, Natl Ctr Computat Hydrosci & Engneering, Oxford, MS 38677 USA 2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 4.USDA ARS, Grazinglands Res Lab, El Reno, OK 73036 USA |
| 推荐引用方式 GB/T 7714 | Liu, Gang,Zheng, Fenli,Jia, Lu,et al. Interactive effects of raindrop impact and groundwater seepage on soil erosion[J]. JOURNAL OF HYDROLOGY,2019,578:8. |
| APA | Liu, Gang.,Zheng, Fenli.,Jia, Lu.,Jia, Yafei.,Zhang, Xun-chang .,...&Zhang, Jiaqiong.(2019).Interactive effects of raindrop impact and groundwater seepage on soil erosion.JOURNAL OF HYDROLOGY,578,8. |
| MLA | Liu, Gang,et al."Interactive effects of raindrop impact and groundwater seepage on soil erosion".JOURNAL OF HYDROLOGY 578(2019):8. |
入库方式： OAI收割
来源：地理科学与资源研究所
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