Formation mechanism of collapsing gully in southern China and the relationship with granite residual soil: A geotechnical perspective
文献类型：期刊论文
| 作者 | Liu, Xinyu2,3,4; Zhang, Xianwei3; Kong, Lingwei3; Wang, Gang2,3; Liu, Honghu1,5 |
| 刊名 | CATENA
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 210页码:13 |
| 关键词 | Collapsing gully Soil erosion Granite residual soil Weathering Disintegration Cementation |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2021.105890 |
| 通讯作者 | Zhang, Xianwei(xwzhang@whrsm.ac.cn) |
| 英文摘要 | Recently, there has been an increase in collapsing gullies in the south of China as one of the most destructive types of soil erosion. Most collapsing gullies are formed on a well-developed granite crust; thus, granite residual soil plays a critical role. However, the extent to which the geotechnical features of residual soil, especially soil disintegration, affects collapsing gully formation is poorly understood. This study performed laboratory disintegration tests on granite residual soil taken from the red soil, sandy soil, and detritus layers of a collapsing gully. The disintegration behaviour was quantified by defining the disintegration ratio, R-d, and three equivalent disintegration rates, v(I), v(II,) and vI(II), corresponding to R-d =10%, 30%, and 50%, respectively. The results revealed that the red soil layer (depth < 1.3 m) and the soil at the shallower depth of the sandy soil layer (depth < 3.0 m) showed similar disintegration behaviours, which were complete (R-d = 100%) and rapid, with vI values in the range of 66.7-266.7%/min. The soil disintegration in the sandy soil layer was characterised by an incremental increase in R-d to 100% within 100 min. The residual soil at the bottom of the sandy soil layer and the top of the detritus layer (depths of 4.0-8.0 m) disintegrated consistently at the first, after which the disintegration rate gradually decreased with v(III) lower than 1%/min. The detritus layer soil at a depth greater than 10.0 m showed incomplete disintegration, and the ultimate R-d was approximately 60%. The formation mechanism for the soil disintegration and gully collapse was also proposed. The weakening of cementation triggered the breakup of soil aggregates and led to soil disintegration and the occurrence of a gully collapse. This study provided new insights on gully erosion. |
| WOS关键词 | PARTICLE-SIZE DISTRIBUTIONS ; STEEP SLOPES ; SEDIMENT ; EROSION |
| 资助项目 | National Natural Science Foundation of China[41972285] ; National Natural Science Foundation of China[41672293] ; Youth Innovation Promotion Association CAS[2018363] ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection[SKLGP2020K024] ; Science Fund for Distinguished Young Scholars of Hubei Province[2020CFA103] ; Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of the People's Republic of China ; CRSRI Open Research Program[CKWV2021884/KY] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000790432300001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; Science Fund for Distinguished Young Scholars of Hubei Province ; Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of the People's Republic of China ; CRSRI Open Research Program |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/175790]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang, Xianwei |
| 作者单位 | 1.Changjiang Water Resource Commiss, Changjiang River Sci Res Inst, Wuhan 430010, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Beijing Normal Univ, Key Lab Environm Change & Nat Disaster, Minist Educ, Beijing 100875, Peoples R China 5.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess Pl, Yangling 712100, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xinyu,Zhang, Xianwei,Kong, Lingwei,et al. Formation mechanism of collapsing gully in southern China and the relationship with granite residual soil: A geotechnical perspective[J]. CATENA,2022,210:13. |
| APA | Liu, Xinyu,Zhang, Xianwei,Kong, Lingwei,Wang, Gang,&Liu, Honghu.(2022).Formation mechanism of collapsing gully in southern China and the relationship with granite residual soil: A geotechnical perspective.CATENA,210,13. |
| MLA | Liu, Xinyu,et al."Formation mechanism of collapsing gully in southern China and the relationship with granite residual soil: A geotechnical perspective".CATENA 210(2022):13. |
入库方式： OAI收割
来源：地理科学与资源研究所
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