Numerical investigation of the influence of banded sand ditches on water infiltration in fine-textured soil

doi:10.2166/wst.2022.140

	Numerical investigation of the influence of banded sand ditches on water infiltration in fine-textured soil
	Fan, Yanwei; Zhang, Changyan; Wei, Hujun; Shi, Wen
刊名	WATER SCIENCE AND TECHNOLOGY
	2022-05-01
卷号	85 期号:9 页码:2693-2709
关键词	banded sand ditch HYDRUS simplified infiltration model water infiltration
ISSN号	0273-1223
DOI	10.2166/wst.2022.140
英文摘要	Enhancing rainwater infiltration is important to reduce the risk of urban waterlogging and improve the utilization rate of urban rainwater resources. Using the HYDRUS model, a mathematical model of soil water movement under a banded sand ditch pattern (the vertical excavation of a deep trench with heavy soil and filled with light soil) was created. Forty-six scenarios were designed to examine effects of sand ditch soil saturated hydraulic conductivity (K-ss), original homogenous fine-textured soil saturated hydraulic conductivity (K-so), sand ditch width (W), spacing (S), and depth (D) on the soil infiltration rate (i). Results indicate that banded sand ditches cause increased permeation and have a significant turning point 't(0)' in the curve of 'i' for 't.' Taking 't(0)' as the boundary, 'i' can be divided into two stages (t <= t(0) and t > t(0)), 'i' and 't,' for each stage according to the power function relationship; there is little change in power function indices, which can be fixed at 0.34 and 0.63, respectively. In addition, the coefficient has a linear relationship with K-ss, K-so, W, S, and D. Thus, an estimation model of the soil infiltration rate under a banded sand ditch pattern was proposed and verified for reliability.
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	IWA PUBLISHING
WOS记录号	WOS:000786194000001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158515]
专题	能源与动力工程学院
作者单位	Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Fan, Yanwei,Zhang, Changyan,Wei, Hujun,et al. Numerical investigation of the influence of banded sand ditches on water infiltration in fine-textured soil[J]. WATER SCIENCE AND TECHNOLOGY,2022,85(9):2693-2709.
APA	Fan, Yanwei,Zhang, Changyan,Wei, Hujun,&Shi, Wen.(2022).Numerical investigation of the influence of banded sand ditches on water infiltration in fine-textured soil.WATER SCIENCE AND TECHNOLOGY,85(9),2693-2709.
MLA	Fan, Yanwei,et al."Numerical investigation of the influence of banded sand ditches on water infiltration in fine-textured soil".WATER SCIENCE AND TECHNOLOGY 85.9(2022):2693-2709.