干旱区生态环境知识资源中心(Arid): Entropy-based Model for Gully Erosion - A combination of probabilistic and deterministic components

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DOI	10.1016/j.scitotenv.2022.155629
	Entropy-based Model for Gully Erosion - A combination of probabilistic and deterministic components
	Alencar, P. H. L.; Simplicio, A. A. F.; de Araujo, J. C.
通讯作者	Alencar, PHL
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	836
英文摘要	Gullies are a major threat to ecosystems, potentially leading to land degradation, groundwater depletion, crop loss, debris flow, and desertification. Gullies are also characterized by having a fast development and turning into primary sediment sources. Despite their impact, we have but scarce understanding of how gully erosion evolves and how to model it. In this paper, we propose a new gully erosion model that is based on the classical premise of net shear stress, i.e., hydraulic shear stress minus critical (resistant) shear stress, to calculate detachment rates. In order to calculate hydraulic shear stress, we developed a new equation derived from the principle of minimum cross-entropy; it was validated with laboratory measures from the literature with a Nash-Sutcliffe Efficiency of 0.95. Soil samples were analysed in the laboratory to assess critical shear stress and other soil properties. The novel gully erosion model was implemented in three gully impacted locations with catchment areas ranging from 10-2 to 10+1 ha. To assess channel geometry and eroded volumes, we used Unmanned Aerial Vehicle and Structure-from-Motion technique. The model successfully estimated long-term erosion rates, its efficiency was 0.77, and it is recommended for catchments up to 8 ha. Therefore, the new model provides planners and stakeholders with a tool to assess gully erosion, sediment yield and geometry in most areas.
英文关键词	Linear erosion Open channel Entropy theory Minimum cross entropy
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000831169800005
WOS关键词	BOUNDARY SHEAR-STRESS ; PHYSICALLY-BASED MODEL ; SOIL-EROSION ; DEBRIS FLOWS ; IMPACTS ; PREDICTION ; INITIATION ; HYDROLOGY ; ACCURACY ; POINTS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394384
推荐引用方式 GB/T 7714	Alencar, P. H. L.,Simplicio, A. A. F.,de Araujo, J. C.. Entropy-based Model for Gully Erosion - A combination of probabilistic and deterministic components[J],2022,836.
APA	Alencar, P. H. L.,Simplicio, A. A. F.,&de Araujo, J. C..(2022).Entropy-based Model for Gully Erosion - A combination of probabilistic and deterministic components.SCIENCE OF THE TOTAL ENVIRONMENT,836.
MLA	Alencar, P. H. L.,et al."Entropy-based Model for Gully Erosion - A combination of probabilistic and deterministic components".SCIENCE OF THE TOTAL ENVIRONMENT 836(2022).