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Lateral sediment connectivity of landslides occurred under a heavy rainstorm and its influence on sediment yield of slope-channel cascade on the Loess Plateau

文献类型：期刊论文

作者Yan, Xiqin1,3; Jiao, Juying1,2,3; Li, Mengmeng2; Qi, Hongkun2; Liang, Yue1,3; Xu, Qian2; Zhang, Ziqi2; Jiang, Xiaohan2; Li, Jianjun2; Zhang, Zhixin2
刊名CATENA
出版日期2022-09-01
卷号216页码:10
ISSN号0341-8162
关键词Slope-channel connectivity Lateral sediment connectivity index Soil erosion Sediment source and sink Sediment transport
DOI10.1016/j.catena.2022.106378
通讯作者Jiao, Juying(jyjiao@ms.iswc.ac.cn)
英文摘要The rate at which sediment enters the channel network in the landscape reflects lateral sediment connectivity of the landscape and has significant implications on the hydrological processes in a catchment. The main objective of this research was to quantify the lateral sediment connectivity of landslides and explore their relationship to the sediment yield of slope-channel cascades. Combining fieldwork and unmanned aerial vehicle techniques, we mapped all landslide inventories and calculated the amount of soil erosion. We proposed a new lateral sediment connectivity index (LCI), which takes into account landslide area density, landslide connectivity characteristics, and landslide potential transport distance, to explore whether landslides that occurred under heavy rainstorms affect the sediment yield in slope-channel cascades through legacy effects. Results showed that the area of landslides ranged from 0.2 m(2) to 1100.07 m(2), and the soil erosion amount of landslides ranged from 0.21 t to 1690.81 t during the rainstorm that occurred on 4 August. 2020 with a cumulative rainfall of 216.4 mm. The LCI of landslides was more closely related to the sediment yield of slope-channel cascades after the rainstorm. It was indicated that LCI is a good index to quantify the effect of lateral sediment connectivity of landslides on sediment yield in the catchment and that landslides generated by heavy rainstorms have long-term impacts on sediment transport processes in the slope-channel cascades of the catchment. Regarding slope management, we propose to protect gully slopes by reducing lateral sediment connectivity between upslope areas and gully slopes and to protect terrace slopes by constructing boundary dikes and drainage ditches to reduce slope collapse under heavy rainstorms.
WOS关键词STRUCTURAL CONNECTIVITY ; FLOW CONNECTIVITY ; ROAD NETWORK ; LAND-USE ; RIVER ; LANDSCAPE ; PATTERNS ; SUSCEPTIBILITY ; DRAINAGE ; AREAS
资助项目National Natural Science Foundation of China[U2243213] ; National Natural Science Foundation of China[42077078]
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
出版者ELSEVIER
WOS记录号WOS:000829817900005
资助机构National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/181419]  
专题中国科学院地理科学与资源研究所
通讯作者Jiao, Juying
作者单位1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Yan, Xiqin,Jiao, Juying,Li, Mengmeng,et al. Lateral sediment connectivity of landslides occurred under a heavy rainstorm and its influence on sediment yield of slope-channel cascade on the Loess Plateau[J]. CATENA,2022,216:10.
APA Yan, Xiqin.,Jiao, Juying.,Li, Mengmeng.,Qi, Hongkun.,Liang, Yue.,...&Wang, Haolin.(2022).Lateral sediment connectivity of landslides occurred under a heavy rainstorm and its influence on sediment yield of slope-channel cascade on the Loess Plateau.CATENA,216,10.
MLA Yan, Xiqin,et al."Lateral sediment connectivity of landslides occurred under a heavy rainstorm and its influence on sediment yield of slope-channel cascade on the Loess Plateau".CATENA 216(2022):10.

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来源：地理科学与资源研究所

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