Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026463 |
Flow Loss in Deltaic Distributaries: Impacts on Channel Hydraulics, Morphology, and Stability | |
Esposito, C. R.1,2; Georgiou, I. Y.1,3; Straub, K. M.2 | |
2020-04-24 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2020 |
卷号 | 56期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The most comprehensive data sets documenting hydraulic and sediment transport regimes in the lower reaches of alluvial rivers come from systems that are managed to prevent flow loss from the channel into the overbank environment. Even moderate losses can have significant impacts on in-channel velocity and sediment transport; therefore, a full understanding of flow loss and its effects is an important prerequisite to insights into channel function and to designing effective management strategies. We use the term flow loss for losses of water that are locally small relative to the main channel discharge. We present a unique data set documenting discharge, channel geometry, and water surface elevation from three distributary channel networks in the Mississippi River Delta where flow loss is widespread. We apply our data to validate a 1-D hydraulic model, which then drives a previously validated model of sediment transport. Results from the modeling effort demonstrate that velocity and sediment transport trends are substantially modulated by flow loss in the ranges observed in distributary networks. The effect of flow loss on distributary channels established, we then examine how flood control infrastructure may have impacted the morphological evolution of the lowermost reaches of a large alluvial river like the Mississippi. The expected outcome of preventing flow loss is erosion in the channel's lowermost reach, in agreement with observational data. Finally, we develop a theoretical metric for a stable channel, and show that flow loss is a potentially important and understudied contributor to the long-term behavior of distributary channels. |
英文关键词 | deltas hydrology flow loss sediment transport floodplains |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000537736400020 |
WOS关键词 | SAND-BED RIVERS ; MISSISSIPPI RIVER ; CONNECTIVITY ; LOUISIANA ; TRANSPORT ; SYSTEM |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
URL | 查看原文 |
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/249185 |
专题 | 资源环境科学 |
作者单位 | 1.Water Inst Gulf, Baton Rouge, LA 70802 USA; 2.Tulane Univ, Dept Earth & Environm Sci, New Orleans, LA 70118 USA; 3.Univ New Orleans, Dept Earth & Environm Sci, New Orleans, LA 70148 USA |
推荐引用方式 GB/T 7714 | Esposito, C. R.,Georgiou, I. Y.,Straub, K. M.. Flow Loss in Deltaic Distributaries: Impacts on Channel Hydraulics, Morphology, and Stability[J]. WATER RESOURCES RESEARCH,2020,56(5). |
APA | Esposito, C. R.,Georgiou, I. Y.,&Straub, K. M..(2020).Flow Loss in Deltaic Distributaries: Impacts on Channel Hydraulics, Morphology, and Stability.WATER RESOURCES RESEARCH,56(5). |
MLA | Esposito, C. R.,et al."Flow Loss in Deltaic Distributaries: Impacts on Channel Hydraulics, Morphology, and Stability".WATER RESOURCES RESEARCH 56.5(2020). |
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