Experimental Study on the Permeability of Ecological Slopes under Rainfall Infiltration Conditions
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Published:2023-08-25
Issue:17
Volume:13
Page:9610
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ISSN:2076-3417
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Container-title:Applied Sciences
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language:en
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Short-container-title:Applied Sciences
Author:
Zhan Chuanhai1,
Yang Zhiyong1,
Wu Wenbing2ORCID
Affiliation:
1. School of Civil Engineering and Environment, Hubei University of Technology, Wuhan 430068, China
2. Faculty of Engineering, Zhejiang Institute, China University of Geosciences, Wuhan 430074, China
Abstract
This paper investigates the influence of different vegetation on the permeability of the shallow soil layers of slopes under rainfall infiltration. Firstly, four large slopes are filled in an outdoor natural environment, and the overburdens of the four slopes are Magnolia multiflora, Cynodon dactylon, Magnolia multiflora mixed with Cynodon dactylon, and no vegetation. Secondly, the four slopes are cultivated in an outdoor natural environment for one year. After the vegetation overburdens are matured, the field artificial rainfall test is carried out through a self-developed artificial rainfall device to monitor the water migration law inside the four slopes in real time. Finally, the unsaturated permeability coefficients of the shallow soil layers of slopes are calculated. The results show that the infiltration rate of rainwater in each overburden slope from fastest to slowest is Magnolia multiflora overburden slope, no vegetation slope, Cynodon dactylon overburden slope, and Magnolia multiflora mixed with Cynodon dactylon overburden slope. In the early stage of rainfall, Magnolia multiflora increases the permeability coefficient of the shallow soil layer of the slope, thus weakening the anti-seepage ability of the slope, but the influence of Magnolia multiflora is not obvious in the later stage. Cynodon dactylon and Magnolia multiflora mixed with Cynodon dactylon can significantly reduce the permeability coefficient of the shallow soil layers of the slopes, thereby increasing the anti-seepage ability of the slopes, and the mixed planting of Magnolia multiflora and Cynodon dactylon can minimize the permeability coefficient of the shallow soil of the slope, resulting in the best anti-seepage effect.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Zhejiang Province
China Postdoctoral Science Foundation Funded Project
Engineering Research Centre of Rock-Soil Drilling & Excavation and Protection, Ministry of Education
Zhejiang Natural Science Foundation
Zhejiang Province’s 2022 Key R&D Plan Project-’Lingyan’ Project
Science and Technology Project of Zhejiang Provincial Communication Department
Construction Research Founds of Department of Housing and Urban-Rural Development of Zhejiang Province
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
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