Morphodynamics of Gully Development on the Platform–Slope System of Spoil Dumps under Platform Concentrated Flow

Severe gully erosion on spoil dumps, caused by dense concentrated flow derived from platforms, poses a significant threat to the land management of mining areas. However, little is known about the development processes and mechanisms of gullies on spoil dumps. A flow scouring experiment was conducte...

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Autores principales:	Yun Bai, Mingming Guo, Hongliang Kang, Wenlong Wang, Huan Su, Wenzhao Guo, Chunyan Ma
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	gully erosion scouring experiment morphology change morphology feedback mining area Agriculture S
Acceso en línea:	https://doaj.org/article/8d7e1e2f76b8456db644322a747bf248
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spelling	oai:doaj.org-article:8d7e1e2f76b8456db644322a747bf2482021-11-25T18:10:14ZMorphodynamics of Gully Development on the Platform–Slope System of Spoil Dumps under Platform Concentrated Flow10.3390/land101112702073-445Xhttps://doaj.org/article/8d7e1e2f76b8456db644322a747bf2482021-11-01T00:00:00Zhttps://www.mdpi.com/2073-445X/10/11/1270https://doaj.org/toc/2073-445XSevere gully erosion on spoil dumps, caused by dense concentrated flow derived from platforms, poses a significant threat to the land management of mining areas. However, little is known about the development processes and mechanisms of gullies on spoil dumps. A flow scouring experiment was conducted on an established platform–slope system under 3.6–5.04 m<sup>3</sup> h<sup>−1</sup>. The soils of the system consisted of a surface sandy loam A layer and anunderlying clay loam B layer. The results showed that the platform exhibited a gully development process of headcut-incision–headcut-expansion–stabilization and the steep slope experienced gully development of A-layer incision–A-layer expansion–B-layer incision–stabilization. The results showed 88.97–100% of Froude Number (Fr) decrement and 47.90–88.97% of Darcy–Weisbach roughness coefficient increment finished in the two incision stages on the steep slope. Gully depth has the most sensitive response to flow hydraulics. A significant linear correlation exists between gully depth and shear stress, runoff power, Fr, and Reynolds Number (R<sup>2</sup> > 0.337). Overall, the optimal hydraulic indicator varies within different stages for describing the gully morphology development, illustrating the different action mechanism between flow hydraulics and gully morphology. Our findings provide a theoretical support for future mechanistic studies of gully erosion and the land management on spoil dump.Yun BaiMingming GuoHongliang KangWenlong WangHuan SuWenzhao GuoChunyan MaMDPI AGarticlegully erosionscouring experimentmorphology changemorphology feedbackmining areaAgricultureSENLand, Vol 10, Iss 1270, p 1270 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	gully erosion scouring experiment morphology change morphology feedback mining area Agriculture S
spellingShingle	gully erosion scouring experiment morphology change morphology feedback mining area Agriculture S Yun Bai Mingming Guo Hongliang Kang Wenlong Wang Huan Su Wenzhao Guo Chunyan Ma Morphodynamics of Gully Development on the Platform–Slope System of Spoil Dumps under Platform Concentrated Flow
description	Severe gully erosion on spoil dumps, caused by dense concentrated flow derived from platforms, poses a significant threat to the land management of mining areas. However, little is known about the development processes and mechanisms of gullies on spoil dumps. A flow scouring experiment was conducted on an established platform–slope system under 3.6–5.04 m<sup>3</sup> h<sup>−1</sup>. The soils of the system consisted of a surface sandy loam A layer and anunderlying clay loam B layer. The results showed that the platform exhibited a gully development process of headcut-incision–headcut-expansion–stabilization and the steep slope experienced gully development of A-layer incision–A-layer expansion–B-layer incision–stabilization. The results showed 88.97–100% of Froude Number (Fr) decrement and 47.90–88.97% of Darcy–Weisbach roughness coefficient increment finished in the two incision stages on the steep slope. Gully depth has the most sensitive response to flow hydraulics. A significant linear correlation exists between gully depth and shear stress, runoff power, Fr, and Reynolds Number (R<sup>2</sup> > 0.337). Overall, the optimal hydraulic indicator varies within different stages for describing the gully morphology development, illustrating the different action mechanism between flow hydraulics and gully morphology. Our findings provide a theoretical support for future mechanistic studies of gully erosion and the land management on spoil dump.
format	article
author	Yun Bai Mingming Guo Hongliang Kang Wenlong Wang Huan Su Wenzhao Guo Chunyan Ma
author_facet	Yun Bai Mingming Guo Hongliang Kang Wenlong Wang Huan Su Wenzhao Guo Chunyan Ma
author_sort	Yun Bai
title	Morphodynamics of Gully Development on the Platform–Slope System of Spoil Dumps under Platform Concentrated Flow
title_short	Morphodynamics of Gully Development on the Platform–Slope System of Spoil Dumps under Platform Concentrated Flow
title_full	Morphodynamics of Gully Development on the Platform–Slope System of Spoil Dumps under Platform Concentrated Flow
title_fullStr	Morphodynamics of Gully Development on the Platform–Slope System of Spoil Dumps under Platform Concentrated Flow
title_full_unstemmed	Morphodynamics of Gully Development on the Platform–Slope System of Spoil Dumps under Platform Concentrated Flow
title_sort	morphodynamics of gully development on the platform–slope system of spoil dumps under platform concentrated flow
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8d7e1e2f76b8456db644322a747bf248
work_keys_str_mv	AT yunbai morphodynamicsofgullydevelopmentontheplatformslopesystemofspoildumpsunderplatformconcentratedflow AT mingmingguo morphodynamicsofgullydevelopmentontheplatformslopesystemofspoildumpsunderplatformconcentratedflow AT hongliangkang morphodynamicsofgullydevelopmentontheplatformslopesystemofspoildumpsunderplatformconcentratedflow AT wenlongwang morphodynamicsofgullydevelopmentontheplatformslopesystemofspoildumpsunderplatformconcentratedflow AT huansu morphodynamicsofgullydevelopmentontheplatformslopesystemofspoildumpsunderplatformconcentratedflow AT wenzhaoguo morphodynamicsofgullydevelopmentontheplatformslopesystemofspoildumpsunderplatformconcentratedflow AT chunyanma morphodynamicsofgullydevelopmentontheplatformslopesystemofspoildumpsunderplatformconcentratedflow
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Morphodynamics of Gully Development on the Platform–Slope System of Spoil Dumps under Platform Concentrated Flow

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