Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR021289 |
Channel-Island Connectivity Affects Water Exposure Time Distributions in a Coastal River Delta | |
Hiatt, Matthew1,2; Castaneda-Moya, Edward2,3; Twilley, Robert2; Hodges, Ben R.1; Passalacqua, Paola1 | |
2018-03-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:3页码:2212-2232 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The exposure time is a water transport time scale defined as the cumulative amount of time a water parcel spends in the domain of interest regardless of the number of excursions from the domain. Transport time scales are often used to characterize the nutrient removal potential of aquatic systems, but exposure time distribution estimates are scarce for deltaic systems. Here we analyze the controls on exposure time distributions using a hydrodynamic model in two domains: the Wax Lake delta in Louisiana, USA, and an idealized channel-island complex. In particular, we study the effects of river discharge, vegetation, network geometry, and tides and use a simple model for the fractional removal of nitrate. In both domains, we find that channel-island hydrological connectivity significantly affects exposure time distributions and nitrate removal. The relative contributions of the island and channel portions of the delta to the overall exposure time distribution are controlled by island vegetation roughness and network geometry. Tides have a limited effect on the system's exposure time distribution but can introduce significant spatial variability in local exposure times. The median exposure time for the WLD model is 10 h under the conditions tested and water transport within the islands contributes to 37-50% of the network-scale exposure time distribution and 52-73% of the modeled nitrate removal, indicating that islands may account for the majority of nitrate removal in river deltas. |
英文关键词 | hydrological connectivity exposure time nitrate removal river delta |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430364900044 |
WOS关键词 | GULF-OF-MEXICO ; FREE-SURFACE FLOW ; WAX LAKE DELTA ; RESIDENCE TIME ; MISSISSIPPI DELTA ; HYDROLOGICAL CONNECTIVITY ; VEGETATION RESISTANCE ; NUMERICAL-SIMULATION ; SEDIMENT TRANSPORT ; NITRATE REMOVAL |
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/21376 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Texas Austin, Dept Civil Architectural & Environm Engn, Ctr Water & Environm, Austin, TX 78712 USA; 2.Louisiana State Univ, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA; 3.Florida Int Univ, Southeast Environm Res Ctr, Miami, FL 33199 USA |
推荐引用方式 GB/T 7714 | Hiatt, Matthew,Castaneda-Moya, Edward,Twilley, Robert,et al. Channel-Island Connectivity Affects Water Exposure Time Distributions in a Coastal River Delta[J]. WATER RESOURCES RESEARCH,2018,54(3):2212-2232. |
APA | Hiatt, Matthew,Castaneda-Moya, Edward,Twilley, Robert,Hodges, Ben R.,&Passalacqua, Paola.(2018).Channel-Island Connectivity Affects Water Exposure Time Distributions in a Coastal River Delta.WATER RESOURCES RESEARCH,54(3),2212-2232. |
MLA | Hiatt, Matthew,et al."Channel-Island Connectivity Affects Water Exposure Time Distributions in a Coastal River Delta".WATER RESOURCES RESEARCH 54.3(2018):2212-2232. |
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