Author(s): Ziyi Wang; Chao Qin; Haifei Liu; Robert R. Wells

Linked Author(s): Haifei Liu

Keywords: Channel width; Channel expansion; Soil composition; Concentrated flow; Plough pan

Abstract: Sidewall collapse of linear soil erosion channels (LECs) dominants LEC evolution process after bed incises to a less- or non-erodible layer, which notably contribute to soil loss in agricultural watersheds in its myriad form (Qin et al., 2019; Dube et al., 2020). Current knowledge for channel widening mechanisms and prediction is limited due to the randomness, sporadic occurrence and non-linearity of the process and the lack of robust and efficient method to capture the rapid erosion morphology (Bingner et al., 2016; Zhao et al., 2022). This study aims to address these gaps through: (1) quantifying the effects of concentrated flow discharge, topography, and soil properties on channel sidewall expansion through controlled laboratory experiments; (2) developing a simplified empirical model that incorporates the key factors affecting channel widening processes; and (3) broadening the applicability of the Channel-DeepLab network model with simplified processing procedure and spatio-temporal continuity.

DOI:

Year: 2025