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Research Article | Open Access

Regulation of vegetation pattern on the hydrodynamic processes of erosion on hillslope in Loess Plateau, China

Guo-Qiang Yu1,2, Qian Wang1,2, Li-Feng Zhu1,2( ), Xia Zhang3
Key Laboratory of Groundwater and Ecology in Arid and Semi-arid Areas, Xi’an Center of Geological Survey, China Geological Survey, Xi’an 710054, China
Shaanxi Province Engineering Research Centre of Water Resources and Environment, Xi’an 710054, China
State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
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Abstract

As vegetation are closely related to soil erosion, hydrodynamic parameter changes under various vegetation pattern conditions can be used as an important basis for the research of the soil erosion mechanism. Through upstream water inflow experiments conducted on a loess hillslope, how the vegetation pattern influences the hydrodynamic processes of sediment transport was analyzed. The results show that the placement of a grass strip on the lower upslope can effectively reduce runoff erosion by 69%, relying on the efficiency of regulated hydrodynamic process. The effective location of grass strip for hillslope alleviating erosion is on the lower part of the upslope, mainly due to the grass strip measure used to regulate the hydrodynamic system. As a result, the underlying surface runoff resistance is increased by 5 times, runoff shear stress is decreased by more than 90%, and runoff power decreased by over 92%. The measure greatly separates the scouring energy of surface runoff that acts on the slope soil. Therefore, the use of grass strips effectively decreases the energy of runoff flowing along the slope, eliminating soil erosion to a great extent and thereby achieving a better regulation of hydrodynamic processe.

Keywords

Soil erosionGrass stripScouring experimentSediment transportRegulating mechanismLoess Plateau

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Journal of Groundwater Science and Engineering
Volume 11 Issue 1,
March 2023
Pages 4-19
DOI: 10.26599/JGSE.2023.9280002
Cite this article:
Yu G-Q, Wang Q, Zhu L-F, et al. Regulation of vegetation pattern on the hydrodynamic processes of erosion on hillslope in Loess Plateau, China. Journal of Groundwater Science and Engineering, 2023, 11(1): 4-19. https://doi.org/10.26599/JGSE.2023.9280002

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Received: 16 May 2022
Accepted: 15 January 2023
Published: 20 March 2023
© 2023 Journal of Groundwater Science and Engineering Editorial Office

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0)
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