Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR021248 |
Subsurface Flow and Moisture Dynamics in Response to Swash Motions: Effects of Beach Hydraulic Conductivity and Capillarity | |
Geng, Xiaolong1; Heiss, James W.2; Michael, Holly A.2; Boufadel, Michel C.1 | |
2017-12-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A combined field and numerical study was conducted to investigate dynamics of subsurface flow and moisture response to waves in the swash zone of a sandy beach located on Cape Henlopen, DE. A density-dependent variably saturated flow model MARUN was used to simulate subsurface flow beneath the swash zone. Values of hydraulic conductivity (K) and characteristic pore size (alpha, a capillary fringe property) were varied to evaluate their effects on subsurface flow and moisture dynamics in response to swash motions in beach aquifers. The site-specific modeling results were validated against spatiotemporal measurements of moisture and pore pressure in the beach. Sensitivity analyses indicated that the hydraulic conductivity and capillary fringe thickness of the beach greatly influenced groundwater flow pathways and associated transit times in the swash zone. A higher value of K enhanced swash-induced seawater infiltration into the beach, thereby resulting in a faster expansion of a wedge of high moisture content induced by swash cycles, and a flatter water table mound beneath the swash zone. In contrast, a thicker capillary fringe retained higher moisture content near the beach surface, and thus, significantly reduced the available pore space for infiltration of seawater. This attenuated wave effects on pore water flow in the unsaturated zone of the beach. Also, a thicker capillary fringe enhanced horizontal flow driven by the larger-scale hydraulic gradient caused by tides. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423299000019 |
WOS关键词 | SATURATED POROUS-MEDIA ; SANDY BEACH ; GROUNDWATER DYNAMICS ; SUBTERRANEAN ESTUARY ; SALT ACCUMULATION ; SOLUTE TRANSPORT ; LABORATORY BEACH ; CLIMATE-CHANGE ; PORE-WATER ; ZONE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21534 |
专题 | 资源环境科学 |
作者单位 | 1.New Jersey Inst Technol, Dept Civil & Environm Engn, Ctr Nat Resources Dev & Protect, Newark, NJ 07102 USA; 2.Univ Delaware, Dept Geol Sci, Newark, NJ USA |
推荐引用方式 GB/T 7714 | Geng, Xiaolong,Heiss, James W.,Michael, Holly A.,et al. Subsurface Flow and Moisture Dynamics in Response to Swash Motions: Effects of Beach Hydraulic Conductivity and Capillarity[J]. WATER RESOURCES RESEARCH,2017,53(12). |
APA | Geng, Xiaolong,Heiss, James W.,Michael, Holly A.,&Boufadel, Michel C..(2017).Subsurface Flow and Moisture Dynamics in Response to Swash Motions: Effects of Beach Hydraulic Conductivity and Capillarity.WATER RESOURCES RESEARCH,53(12). |
MLA | Geng, Xiaolong,et al."Subsurface Flow and Moisture Dynamics in Response to Swash Motions: Effects of Beach Hydraulic Conductivity and Capillarity".WATER RESOURCES RESEARCH 53.12(2017). |
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