气候变化领域集成服务门户(CCPortal): Heterogeneity Affects Intertidal Flow Topology in Coastal Beach Aquifers

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DOI	10.1029/2020GL089612
	Heterogeneity Affects Intertidal Flow Topology in Coastal Beach Aquifers
	Geng X.; Michael H.A.; Boufadel M.C.; Molz F.J.; Gerges F.; Lee K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	Intertidal aquifers are hotspots of biogeochemical cycling where nutrients and contaminants are processed prior to discharge to the ocean. The nature of the dynamic subsurface mixing zone is a critical control on mitigating reactions. Simulation of density-dependent, variably saturated flow and salt transport incorporating realistic representations of aquifer heterogeneity was conducted within a Monte Carlo framework to investigate influence of nonuniform permeability on intertidal groundwater flow and salt transport dynamics. Results show that heterogeneity coupled with tides creates transient preferential flow paths within the intertidal zone, evolving multiple circulation cells and fingering-type salinity distributions. Due to heterogeneity, strain-dominated (intense mixing) and vorticity-dominated (low mixing) flow regions coexist at small spatial scales, and their spatial extent reaches peaks at high tide and low tide. Such topological characteristics reveal complex tempo-spatial mixing patterns for intertidal flow with localized areas of high and low mixing intensities, which have implications for intertidal biogeochemical processing. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Aquifers; Biogeochemistry; Groundwater flow; Groundwater pollution; Groundwater resources; Hydrogeology; Monte Carlo methods; Topology; Aquifer heterogeneity; Biogeochemical cycling; Density dependent; Intertidal zones; Preferential flows; Salinity distributions; Topological characteristics; Variably saturated flow; Mixing; biogeochemistry; coastal aquifer; discharge; groundwater flow; intertidal environment; mixing; permeability; preferential flow; salinity; topography
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169806
作者单位	Department of Civil and Environmental Engineering, New Jersey Institute of Technology, University Heights, Newark, NJ, United States; Department of Earth Sciences, University of Delaware, Newark, DE, United States; Department of Civil and Environmental Engineering, University of Delaware, Newark, DE, United States; Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC, United States; Department of Computer Science, New Jersey Institute of Technology, University Heights, Newark, NJ, United States; Department of Fisheries and Oceans, Fisheries and Oceans Canada, Dartmouth, Ottawa, NS, Canada
推荐引用方式 GB/T 7714	Geng X.,Michael H.A.,Boufadel M.C.,et al. Heterogeneity Affects Intertidal Flow Topology in Coastal Beach Aquifers[J],2020,47(17).
APA	Geng X.,Michael H.A.,Boufadel M.C.,Molz F.J.,Gerges F.,&Lee K..(2020).Heterogeneity Affects Intertidal Flow Topology in Coastal Beach Aquifers.Geophysical Research Letters,47(17).
MLA	Geng X.,et al."Heterogeneity Affects Intertidal Flow Topology in Coastal Beach Aquifers".Geophysical Research Letters 47.17(2020).