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Decoding channel widening dynamics: Linking hydraulic forcing and soil resistance through time-continuous prediction

文献类型：期刊论文

作者Qin, Chao5,6; Wang, Ziyi4,6; Cao, Liekai3; Xu, Ximeng2; Xue, Yuan6; Liu, Haifei4; Zheng, Fenli1
刊名CATENA
出版日期2026-06-30
卷号268页码:14
关键词Channel width Channel expansion Soil composition Concentrated flow Plough pan
ISSN号0341-8162
DOI10.1016/j.catena.2026.110034
通讯作者Wang, Ziyi(ziyiwangmelb@sina.com) ; Liu, Haifei(haifei.liu@bnu.edu.cn)
英文摘要Sidewall expansion becomes the dominant driver of channel evolution and a major source of soil loss, once the bed of a linear erosion channel (LEC) incises to a less erodible layer. However, understanding of the widening process remains limited due to its inherent randomness, non-linearity, and the absence of reliable methods to capture rapid morphological changes. Laboratory experiments were designed to investigate the influences of hydraulic forcing (combined effects of upslope inflow and slope gradient), and resistance to erosion (soil properties) on the channel widening process. A total of 46 experimental runs with 27 treatments (three inflow rates, three slope gradients, and three soils) were conducted in prepacked soil beds. The time series of channel width was captured through photogrammetry. The captured images were processed by the improved Channel-DeepLab network model to automatically export high spatial resolution width data. The results indicated that the sediment discharge and widening rate increased with inflow rate and bed slope. Atwood had the highest unit-width sediment discharge (0.179-1.113 kg s(-1) m(-1)) and widening rate (0.002-0.058 m min(-1)), followed by Loring and Forestdale. Generally, widening rate increased with unit channel length stream power, but the tendency may be less evident when inflow rate or slope gradient played a significantly greater influence on channel widening than the other one. Atwood exhibited high susceptibility to the increase in slope gradient, whereas Loring and Forestdale demonstrated relatively higher susceptibility to inflow rate compared to slope but generally a good resistance to the concentrated flow. Three empirical equations were developed in terms of discharge, slope and soil composition, and the prediction was verified and exhibited a good performance (R-2 > 0.85, NSE > 0.67). The automatic output method and prediction equations of channel widths proposed in this study have the potential to be expanded to natural channel erosion monitoring and management.
WOS关键词BROILER LITTER ; EROSION ; WIDTH ; RAINFALL ; MODEL ; RATES ; CLAY ; BANK ; DEGRADATION ; MIGRATION
资助项目National Key Research and Development Program of China[2024YFC3213100] ; National Natural Science Foundation of China[42277339] ; National Natural Science Foundation of China[52409095] ; Fund Program of the State Key Laboratory of Hydroscience and Engineering[sklhse-KF-2025-E-02]
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
WOS记录号WOS:001733257100001
出版者ELSEVIER
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China ; Fund Program of the State Key Laboratory of Hydroscience and Engineering
源URL[http://ir.ieecas.cn/handle/361006/17827]  
专题地球环境研究所_生态环境研究室
通讯作者Wang, Ziyi; Liu, Haifei
作者单位1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess Pl, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resource Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
3.North China Elect Power Univ, Sch Water Resources & Hydropower Engn, Beijing 102206, Peoples R China
4.Beijing Normal Univ, Sch Environm, Beijing 100875, Peoples R China
5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess Sci, Xian 710061, Shaanxi, Peoples R China
6.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China
推荐引用方式
GB/T 7714		 Qin, Chao,Wang, Ziyi,Cao, Liekai,et al. Decoding channel widening dynamics: Linking hydraulic forcing and soil resistance through time-continuous prediction[J]. CATENA,2026,268:14.
APA Qin, Chao.,Wang, Ziyi.,Cao, Liekai.,Xu, Ximeng.,Xue, Yuan.,...&Zheng, Fenli.(2026).Decoding channel widening dynamics: Linking hydraulic forcing and soil resistance through time-continuous prediction.CATENA,268,14.
MLA Qin, Chao,et al."Decoding channel widening dynamics: Linking hydraulic forcing and soil resistance through time-continuous prediction".CATENA 268(2026):14.

入库方式： OAI收割

来源：地球环境研究所

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