Rainfall-triggered mass movements on steep loess slopes and their entrainment and distribution
文献类型：期刊论文
| 作者 | Guo, Wenzhao1,2; Xu, Xiangzhou3; Wang, Wenlong1,2; Liu, Yakun3; Guo, Mingming2; Cui, Zhiqiang1 |
| 刊名 | CATENA
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 183页码:11 |
| ISSN号 | 0341-8162 |
| 关键词 | Mass movement Soil erosion Entrainment Rainfall simulation experiments Loess Plateau |
| DOI | 10.1016/j.catena.2019.104238 |
| 通讯作者 | Wang, Wenlong(nwafu_wwl@163.com) |
| 英文摘要 | Mass movements are predominant geomorphic processes on steep hillslopes. However, the mechanisms governing the erosion and entrainment of mass movements remain poorly understood. In this study, experiments on natural loess slopes were conducted to induce a series of mass movements under simulated rainfalls in the Liudaogou Catchment on the Loess Plateau of China. A novel topography meter was used to observe random mass movements. A total of 499 mass movements in 42 rainfall events and an average of 11 mass movements for each rainfall event were observed. Three mass movement types were detected: landslides (67%) > mudflows (21%) > avalanches (12%). The volume of landslides dramatically increased through the entrainment of a wet gully bed material, and the volume of landslide mass was magnified by 29% on average through material entrainment. Based on the observed data, the probability of mass movement occurrences decreased with the increasing mass movement volume in a power-law relationship. The critical rainfall amount for mass movement failure was approximately 25.6 mm at a rainfall intensity of 50 mm h(-1) . These results can serve as guides to mitigate geological hazards and assess erosion processes on steep loess slopes of the Loess Plateau. |
| WOS关键词 | GRAVITY EROSION ; NEW-ZEALAND ; LANDSLIDES ; INSTABILITY ; CATCHMENT ; EVOLUTION ; FREQUENCY ; HILLSLOPE ; DRIVEN ; ISLAND |
| 资助项目 | National Natural Science Foundation of China[51879032] ; National Natural Science Foundation of China[41907057] ; Western Light Foundation of the Chinese Academy of Sciences[XAB2018807] ; National Key Research and Development Program[2016YFC0402504] ; Fundamental Research Funds for the Central Universities[2452018046] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000488417700042 |
| 资助机构 | National Natural Science Foundation of China ; Western Light Foundation of the Chinese Academy of Sciences ; National Key Research and Development Program ; Fundamental Research Funds for the Central Universities |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/129828]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Wenlong |
| 作者单位 | 1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Dalian Univ Technol, Sch Hydraul Engn, Dalian 116024, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Wenzhao,Xu, Xiangzhou,Wang, Wenlong,et al. Rainfall-triggered mass movements on steep loess slopes and their entrainment and distribution[J]. CATENA,2019,183:11. |
| APA | Guo, Wenzhao,Xu, Xiangzhou,Wang, Wenlong,Liu, Yakun,Guo, Mingming,&Cui, Zhiqiang.(2019).Rainfall-triggered mass movements on steep loess slopes and their entrainment and distribution.CATENA,183,11. |
| MLA | Guo, Wenzhao,et al."Rainfall-triggered mass movements on steep loess slopes and their entrainment and distribution".CATENA 183(2019):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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