Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR024671 |
Effects of Tidally Varying Salinity on Groundwater Flow and Solute Transport: Insights From Modelling an Idealized Creek Marsh Aquifer | |
Xiao, Kai1,2; Li, Hailong1; Xia, Yuqiang3; Yang, Jinzhong2; Wilson, Alicia M.4; Michael, Holly A.5; Geng, Xiaolong5; Smith, Erik6; Boufadel, Michel C.7; Yuan, Ping1; Wang, Xuejing1 | |
2019-11-23 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Most existing numerical research on tide-induced groundwater dynamics assumes a constant surface water salinity on the seaward boundary (constant salinity case). Few studies have investigated the influence of tidally varying salinity on shallow groundwater dynamics in coastal aquifers (tidal salinity case). We compiled field observations of tidally varying salinity in multiple estuaries across the eastern coast of China and a tidal creek in North Inlet-Winyah Bay, United States. Numerical simulations were then conducted to explore the effect of tidally varying salinity on groundwater flow and salt transport in an idealized creek marsh aquifer. Results showed that the upper saline plume and classical saltwater wedge appeared in all cases, but the salinity in the saltwater wedge was diluted in the tidal salinity cases. Notably, groundwater transit times were shorter in the tidal salinity case than in the constant salinity case, especially under the creek bottom. Quantitative analyses indicated that tidally varying salinity significantly enhanced surface water-groundwater exchange, increasing submarine groundwater discharge by 10% and the total inflow of surface water across the water-sediment interface by 7%. As the density of groundwater differs from that of the overlying surface water, fingered saltwater flow formed in sediments under the creek bottom, leading to some small local water circulation cells. These small cells reduced groundwater transit times and almost doubled the water exchange rate. Coupling the density-dependent flow to a simplified nitrogen reaction network revealed that the tidally varying salinity may have the potential to influence nitrogen biogeochemical transformations that modify nitrogen loads prior to discharge. |
英文关键词 | submarine groundwater discharge numerical simulation tidal creek upper saline plumes coastal wetlands |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000501338300001 |
WOS关键词 | DISSOLVED-OXYGEN DYNAMICS ; PORE-WATER FLOW ; COASTAL AQUIFERS ; BIOGEOCHEMICAL PROCESSES ; NUMERICAL SIMULATIONS ; SUBTERRANEAN ESTUARY ; STEADY-STATE ; EXCHANGE ; SEA ; BAY |
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/223925 |
专题 | 资源环境科学 |
作者单位 | 1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen, Guangdong, Peoples R China; 2.Wuhan Univ, Sch Water Resources & Hydropower Engn, Wuhan, Hubei, Peoples R China; 3.Minist Water Resources, Changjiang Water Resources Commiss, Changjiang River Sci Res Inst, Wuhan, Hubei, Peoples R China; 4.Univ South Carolina, Sch Earth Ocean & Environm, Columbia, SC 29208 USA; 5.Univ Delaware, Dept Geol Sci, Newark, DE USA; 6.North Inlet Winyah Bay Natl Estuarine Res Reserve, Georgetown, SC USA; 7.New Jersey Inst Technol, Dept Civil & Environm Engn, Ctr Nat Resources Dev & Protect, Newark, NJ USA |
推荐引用方式 GB/T 7714 | Xiao, Kai,Li, Hailong,Xia, Yuqiang,et al. Effects of Tidally Varying Salinity on Groundwater Flow and Solute Transport: Insights From Modelling an Idealized Creek Marsh Aquifer[J]. WATER RESOURCES RESEARCH,2019. |
APA | Xiao, Kai.,Li, Hailong.,Xia, Yuqiang.,Yang, Jinzhong.,Wilson, Alicia M..,...&Wang, Xuejing.(2019).Effects of Tidally Varying Salinity on Groundwater Flow and Solute Transport: Insights From Modelling an Idealized Creek Marsh Aquifer.WATER RESOURCES RESEARCH. |
MLA | Xiao, Kai,et al."Effects of Tidally Varying Salinity on Groundwater Flow and Solute Transport: Insights From Modelling an Idealized Creek Marsh Aquifer".WATER RESOURCES RESEARCH (2019). |
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