Upslope sediment-laden flow impacts on ephemeral gully erosion: Evidences from field monitoring and laboratory simulation

Xu, Ximeng; Zheng, Fenli; Tang, Qiuhong; Wilson, George Grafton; Wu, Min; Han, Yong; Xiao, Peng; Zhang, X. C.

doi:10.1016/j.catena.2021.105802

Cited by 5 publications

(1 citation statement)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ephemeral gullies are developed by the continuous intensified erosion of rills. The major causes of ephemeral gully erosion are microtopographic fluctuations and unreasonable farming methods, and the long-term existence of ephemeral gully will accelerate soil erosion and change the surface slope (Liu et al, 2013;Douglas-Mankin et al, 2020;Xu et al, 2022). Statistics show that the existing area of soil erosion in the black soil of China is 27.59 km 2 , accounting for about 27% of the total black soil area, while the number of erosion ditches produced by hydraulic erosion is about 29×10 4 (MWR (Ministry of Water Resources), 2013).…”

Section: Introductionmentioning

confidence: 99%

Sediment yield and erosion-deposition distribution characteristics in ephemeral gullies in black soil areas under geocell protection

et al. 2023

View full text Add to dashboard Cite

Investigating the effect of geocells on the erosion and deposition distribution of ephemeral gullies in the black soil area of Northeast China can provide a scientific basis for the allocation of soil and water conservation measures in ephemeral gullies. In this study, an artificial simulated confluence test and stereoscopic photogrammetry were used to analyze the distribution characteristics of erosion and deposition in ephemeral gullies protected by geocells and the effect of different confluence flows on the erosion process of ephemeral gullies. Results showed that when the confluence flow was larger, the effect of geocell was more evident, and the protection against ephemeral gully erosion was stronger. When the confluence flow rates were 0.6, 1.8, 2.4, and 3.0 m 3 /h, ephemeral gully erosion decreased by 37.84%, 26.09%, 21.40%, and 35.45%. When the confluence flow rates were 2.4 and 3.0 m 3 /h, the average sediment yield rate of the ephemeral gully was close to 2.14 kg/(m 2 •min), and the protective effect of ephemeral gully erosion was enhanced. When the flow rate was higher, the surface fracture of the ephemeral gully was more serious. With an increase in confluence flow rate, the ratio of erosion to deposition increased gradually, the erosion area of ephemeral gullies was expanded, and erosion depth changed minimally. In conclusion, geocell measures changed erosion patterns by altering the rill erosion/deposition ratio, converting erosion from rill erosion to sheet erosion.

show abstract

Section: Introductionmentioning

confidence: 99%