干旱区生态环境知识资源中心(Arid): Virus transport from drywells under constant head conditions: A modeling study

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DOI	10.1016/j.watres.2021.117040
	Virus transport from drywells under constant head conditions: A modeling study
	Sasidharan, Salini; Bradford, Scott A.; Simunek, Jiri; Kraemer, Stephen R.
通讯作者	Sasidharan, S (corresponding author), ARS, USDA, Salin Lab, Riverside, CA 92507 USA.
来源期刊	WATER RESEARCH
ISSN	0043-1354
EISSN	1879-2448
出版年	2021
卷号	197
英文摘要	Many arid and semi-arid regions of the world face challenges in maintaining the water quantity and quality needs of growing populations. A drywell is an engineered vadose zone infiltration device widely used for stormwater capture and managed aquifer recharge. To our knowledge, no prior studies have quantitatively examined virus transport from a drywell, especially in the presence of subsurface heterogeneity. Axisymmetric numerical experiments were conducted to systematically study virus fate from a drywell for various virus removal and subsurface heterogeneity scenarios under steady-state flow conditions from a constant head reservoir. Subsurface domains were homogeneous or had stochastic heterogeneity with selected standard deviation (sigma) of lognormal distribution in saturated hydraulic conductivity and horizontal ( X) and vertical ( Z ) correlation lengths. Low levels of virus concentration tailing can occur even at a separation distance of 22 m from the bottom of the drywell, and 6-log10 virus removal was not achieved when a small detachment rate (kd1 = 1 -; 10 +/-& minus;5 min c1) is present in a homogeneous domain. Improved virus removal was achieved at a depth of 22 m in the presence of horizontal lenses (e.g., X= 10 m, Z= 0.1 m, sigma= 1) that enhanced the lateral movement and distribution of the virus. In contrast, faster downward movement of the virus with an early arrival time at a depth of 22 m occurred when considering a vertical correlation in permeability (X= 1 m, Z= 2 m, sigma= 1). Therefore, the general assumption of a 1.5-12 m separation distance to protect water quality may not be adequate in some instances, and site-specific microbial risk assessment is essential to minimize risk. Microbial water quality can potentially be improved by using an in situ soil treatment with iron oxides to increase irreversible attachment and solid-phase inactivation. (C) 2021 Elsevier Ltd. All rights reserved.
英文关键词	Vadose zone Managed aquifer recharge Drywell Virus Water Quality HYDRUS (2D/3D)
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000644359600012
WOS关键词	MANAGED AQUIFER RECHARGE ; SATURATED POROUS-MEDIA ; UNSATURATED FLOW ; MICROBIAL-CONTAMINATION ; DRINKING-WATER ; HYDRAULIC CONDUCTIVITY ; POTENTIAL IMPLICATIONS ; CORRELATION EQUATION ; HETEROGENEOUS SOILS ; STOCHASTIC-ANALYSIS
WOS类目	Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351977
作者单位	[Sasidharan, Salini; Simunek, Jiri] Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA; [Sasidharan, Salini; Bradford, Scott A.] ARS, USDA, Sustainable Agr Water Syst Unit, Davis, CA 95616 USA; [Kraemer, Stephen R.] US EPA, Off Res & Dev, San Francisco, CA 94105 USA
推荐引用方式 GB/T 7714	Sasidharan, Salini,Bradford, Scott A.,Simunek, Jiri,et al. Virus transport from drywells under constant head conditions: A modeling study[J],2021,197.
APA	Sasidharan, Salini,Bradford, Scott A.,Simunek, Jiri,&Kraemer, Stephen R..(2021).Virus transport from drywells under constant head conditions: A modeling study.WATER RESEARCH,197.
MLA	Sasidharan, Salini,et al."Virus transport from drywells under constant head conditions: A modeling study".WATER RESEARCH 197(2021).