Laboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types

Abstract The problems caused by the interaction between slopes and hydrologic environment in traffic civil engineering are very serious in the granite residual soil area of China, especially in Guangdong Province. Against the background of two heavy rainfall events occurring during a short period du...

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Autores principales:	Jie Chen, Xue-wen Lei, Han-lin Zhang, Zhi Lin, Hui Wang, Wei Hu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2a96947b56344d678d7beb1a46819140
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spelling	oai:doaj.org-article:2a96947b56344d678d7beb1a468191402021-12-02T17:03:49ZLaboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types10.1038/s41598-021-94276-42045-2322https://doaj.org/article/2a96947b56344d678d7beb1a468191402021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94276-4https://doaj.org/toc/2045-2322Abstract The problems caused by the interaction between slopes and hydrologic environment in traffic civil engineering are very serious in the granite residual soil area of China, especially in Guangdong Province. Against the background of two heavy rainfall events occurring during a short period due to a typhoon making landfall twice or even two typhoons consecutively making landfall, laboratory model tests were carried out on the hydrological effects of the granite residual soil slope considering three vegetation types under artificial rainfall. The variation in slope surface runoff, soil moisture content and rain seepage over time was recorded during the tests. The results indicate that surface vegetation first effectively reduces the splash erosion impact of rainwater on slopes and then influences the slope hydrological effect through rainwater forms adjustment. (1) The exposed slope has weak resistance to two consecutive heavy rains, the degree of slope scouring and soil erosion damage will increase greatly during the second rainfall. (2) The multiple hindrances of the stem leaf of Zoysia japonica plays a leading role in regulating the hydrological effect of slope, the root system has little effect on the permeability and water storage capacity of slope soil, but improves the erosion resistance of it. (3) Both the stem leaf and root system of Nephrolepis cordifolia have important roles on the hydrological effect. The stem leaf can stabilize the infiltration of rainwater, and successfully inhibit the surface runoff under continuous secondary heavy rainfall. The root system significantly enhances the water storage capacity of the slope, and greatly increases the permeability of the slope soil in the second rainfall, which is totally different from that of the exposed and Zoysia japonica slopes. (4) Zoysia is a suitable vegetation species in terms of slope protection because of its comprehensive slope protection effect. Nephrolepis cordifolia should be cautiously planted as slope protection vegetation. Only on slopes with no stability issues should Nephrolepis cordifolia be considered to preserve soil and water.Jie ChenXue-wen LeiHan-lin ZhangZhi LinHui WangWei HuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-17 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jie Chen Xue-wen Lei Han-lin Zhang Zhi Lin Hui Wang Wei Hu Laboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types
description	Abstract The problems caused by the interaction between slopes and hydrologic environment in traffic civil engineering are very serious in the granite residual soil area of China, especially in Guangdong Province. Against the background of two heavy rainfall events occurring during a short period due to a typhoon making landfall twice or even two typhoons consecutively making landfall, laboratory model tests were carried out on the hydrological effects of the granite residual soil slope considering three vegetation types under artificial rainfall. The variation in slope surface runoff, soil moisture content and rain seepage over time was recorded during the tests. The results indicate that surface vegetation first effectively reduces the splash erosion impact of rainwater on slopes and then influences the slope hydrological effect through rainwater forms adjustment. (1) The exposed slope has weak resistance to two consecutive heavy rains, the degree of slope scouring and soil erosion damage will increase greatly during the second rainfall. (2) The multiple hindrances of the stem leaf of Zoysia japonica plays a leading role in regulating the hydrological effect of slope, the root system has little effect on the permeability and water storage capacity of slope soil, but improves the erosion resistance of it. (3) Both the stem leaf and root system of Nephrolepis cordifolia have important roles on the hydrological effect. The stem leaf can stabilize the infiltration of rainwater, and successfully inhibit the surface runoff under continuous secondary heavy rainfall. The root system significantly enhances the water storage capacity of the slope, and greatly increases the permeability of the slope soil in the second rainfall, which is totally different from that of the exposed and Zoysia japonica slopes. (4) Zoysia is a suitable vegetation species in terms of slope protection because of its comprehensive slope protection effect. Nephrolepis cordifolia should be cautiously planted as slope protection vegetation. Only on slopes with no stability issues should Nephrolepis cordifolia be considered to preserve soil and water.
format	article
author	Jie Chen Xue-wen Lei Han-lin Zhang Zhi Lin Hui Wang Wei Hu
author_facet	Jie Chen Xue-wen Lei Han-lin Zhang Zhi Lin Hui Wang Wei Hu
author_sort	Jie Chen
title	Laboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types
title_short	Laboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types
title_full	Laboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types
title_fullStr	Laboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types
title_full_unstemmed	Laboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types
title_sort	laboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2a96947b56344d678d7beb1a46819140
work_keys_str_mv	AT jiechen laboratorymodelteststudyofthehydrologicaleffectongraniteresidualsoilslopesconsideringdifferentvegetationtypes AT xuewenlei laboratorymodelteststudyofthehydrologicaleffectongraniteresidualsoilslopesconsideringdifferentvegetationtypes AT hanlinzhang laboratorymodelteststudyofthehydrologicaleffectongraniteresidualsoilslopesconsideringdifferentvegetationtypes AT zhilin laboratorymodelteststudyofthehydrologicaleffectongraniteresidualsoilslopesconsideringdifferentvegetationtypes AT huiwang laboratorymodelteststudyofthehydrologicaleffectongraniteresidualsoilslopesconsideringdifferentvegetationtypes AT weihu laboratorymodelteststudyofthehydrologicaleffectongraniteresidualsoilslopesconsideringdifferentvegetationtypes
_version_	1718381897623535616

Laboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types

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