Upslope sediment-laden flow impacts on ephemeral gully erosion: Evidences from field monitoring and laboratory simulation
文献类型：期刊论文
| 作者 | Xu, Ximeng2,3; Zheng, Fenli3; Tang, Qiuhong2; Wilson, Glenn, V4; Wu, Min5; Han, Yong6; Xiao, Peiqing1; Zhang, Xunchang J.7 |
| 刊名 | CATENA
 |
| 出版日期 | 2022-02-01 |
| 卷号 | 209页码:10 |
| ISSN号 | 0341-8162 |
| 关键词 | Soil erosion Sediment transport Runoff plot Extreme rainfall Ephemeral gully |
| DOI | 10.1016/j.catena.2021.105802 |
| 通讯作者 | Zheng, Fenli(flzh@ms.iswc.ac.cn) ; Tang, Qiuhong(tangqh@igsnrr.ac.cn) |
| 英文摘要 | Ephemeral gully (EG) is an important linear erosion feature, often occurring at mid-slope position, that can be greatly influenced by upslope inflow and its sediment transport capacity. How sediment concentration in upslope inflow influences downslope EG erosion is still unclear. Thus, field monitoring on a natural hillslope and indoor simulations on a dual-box system were conducted to better understand their relationship. The results showed that both field monitoring and indoor simulation displayed the additional sediment delivery caused by upslope sediment-laden flow, verifying the transport-dominated sediment regime in EG systems. In field observations, the sediment increment coefficient (SIC, ratio of net sediment delivery caused by upslope sediment-laden flow to the total sediment delivery) on an event scale varied from 4.6% to 88.6%. In indoor simulations, the SIC changed from 24.9% to 87.5%. Indoor simulation experiments with a range of 0-378.2 g L-1 sediment concentration supplied by a feeder box, showed that SIC linearly decreased as sediment concentration of upslope inflow increased. Field monitoring showed complicated phenomenon because of natural random variations. For rainfall events with PI30 (the product of precipitation and maximum 30-minute rainfall intensity) larger than 400 mm(2) h(-1) (similar to the designed extreme rainfall in laboratory simulations), SIC also generally decreased as sediment concentration of upslope inflow increased, especially when sediment concentration of upslope inflow was smaller than 400 gL(-1). Thus, laboratory simulations verified the field monitoring results of extreme rainfall events with large rainfall amounts and intensities. This study illustrated the necessity of in-situ field monitoring and indicated that design of indoor simulation experiments needs more comprehensive considerations on complicated hydrological and sediment conditions. |
| WOS关键词 | SOIL-EROSION ; LOESS PLATEAU ; RAINFALL SIMULATOR ; NUTRIENT LOSS ; HILLSLOPE ; MODEL ; PREDICTION ; AREA ; DEFORESTATION ; DEGRADATION |
| 资助项目 | National Key R&D Program of China[2016YFE0202900] ; National Natural Science Foundation of China[41907060] ; National Natural Science Foundation of China[41730645] ; National Natural Science Foundation of China[41790424] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000711850200012 |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/167366]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zheng, Fenli; Tang, Qiuhong |
| 作者单位 | 1.Chinese Acad Sci & Minist Water Resources, Yellow River Inst Hydraul Res, Key Lab Soil & Water Conservat Loess Plateau, Zhengzhou 450003, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 3.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.USDA ARS, Natl Sedimentat Lab, Oxford, MS 38655 USA 5.Shenyang Agr Univ, Coll Water Conservancy, Shenyang 11086, Peoples R China 6.Ankang Univ, Ankang 725000, Shaanxi, Peoples R China 7.USDA ARS, Grazinglands Res Lab, El Reno, OK 73036 USA |
| 推荐引用方式 GB/T 7714 | Xu, Ximeng,Zheng, Fenli,Tang, Qiuhong,et al. Upslope sediment-laden flow impacts on ephemeral gully erosion: Evidences from field monitoring and laboratory simulation[J]. CATENA,2022,209:10. |
| APA | Xu, Ximeng.,Zheng, Fenli.,Tang, Qiuhong.,Wilson, Glenn, V.,Wu, Min.,...&Zhang, Xunchang J..(2022).Upslope sediment-laden flow impacts on ephemeral gully erosion: Evidences from field monitoring and laboratory simulation.CATENA,209,10. |
| MLA | Xu, Ximeng,et al."Upslope sediment-laden flow impacts on ephemeral gully erosion: Evidences from field monitoring and laboratory simulation".CATENA 209(2022):10. |
入库方式： OAI收割
来源：地理科学与资源研究所
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