The impact of concentrated flow and slope on unpaved loess‐road erosion on the Chinese Loess Plateau

Autor:	Jianming Li, Zhiqiang Cui, Wen-Zhao Guo, Yun Bai, Wenlong Wang, Zhengan Su
Rok vydání:	2020
Předmět:	Hydrology geography Watershed geography.geographical_feature_category Flow (psychology) Soil Science Loess plateau Development Grassland Rill Loess Road surface Erosion Environmental Chemistry Environmental science General Environmental Science
Zdroj:	Land Degradation & Development. 32:914-925
ISSN:	1099-145X 1085-3278
DOI:	10.1002/ldr.3774
Popis:	Loess‐roads (LR) still experience severe soil erosion due to concentrated flow during rainstorms in watersheds on the Chinese Loess Plateau, where soil erosion in sloping farmland, abandoned land, and grassland has been controlled. However, road erosion is commonly overlooked because unpaved roads represent a small part of the catchment area. In situ scouring‐erosion experiments were performed on LR surfaces in the Liuaogou watershed on the Loess Plateau. The erosion rate of the LR was 14.1–234.6 g m⁻² min⁻¹, which is 10.8–57.5‐times higher than that on an adjacent grassy hillslope. In most experiments, the LR erosion rate generally increased linearly with increasing concentrated flow and slope gradient (R² > .85; significance p
Databáze:	OpenAIRE
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