Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023527 |
Dynamics of Surface-Water Connectivity in a Low-Gradient Meandering River Floodplain | |
Czuba, Jonathan A.1,2; David, Scott R.3; Edmonds, Douglas A.3; Ward, Adam S.4 | |
2019-03-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:3页码:1849-1870 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | High-resolution topography reveals that floodplains along meandering rivers in Indiana commonly contain intermittently flowing channel networks. We investigated how the presence of floodplain channels affects lateral surface-water connectivity between a river and floodplain (specifically exchange flux and timescales of transport) as a function of flow stage in a low-gradient river-floodplain system. We constructed a two-dimensional, surface-water hydrodynamic model using Hydrologic Engineering Center's River Analysis System (HEC-RAS) 2D along 32km of floodplain (56km along the river) of the East Fork White River near Seymour, Indiana, USA, using lidar elevation data and surveyed river bathymetry. The model was calibrated using land-cover specific roughness to elevation-discharge data from a U.S. Geological Survey gage and validated against high-water marks, an aerial photo showing the spatial extent of floodplain inundation, and measured flow velocities. Using the model results, we analyzed the flow in the river, spatial patterns of inundation, flow pathways, river-floodplain exchange, and water residence time on the floodplain. Our results highlight that bankfull flow is an oversimplified concept for explaining river-floodplain connectivity because some stream banks are overtopped and major low-lying floodplain channels are inundated roughly 19days per year. As flow increased, inundation of floodplain channels at higher elevations dissected the floodplain, until the floodplain channels became fully inundated. Additionally, we found that river-floodplain exchange was driven by bank height or channel orientation depending on flow conditions. We propose a conceptual model of river-floodplain connectivity dynamics and developed metrics to analyze quantitatively complex river-floodplain systems. |
英文关键词 | floodplain channels complex floodplain river-floodplain exchange connectivity residence time bankfull flow |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000464660000006 |
WOS关键词 | HYDROLOGICAL CONNECTIVITY ; COMPUTER-MODEL ; AMAZON RIVER ; STREAM ; SIMULATION ; EXCHANGE ; NITRATE ; DENITRIFICATION ; MORPHODYNAMICS ; COMPLEXITY |
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/181555 |
专题 | 资源环境科学 |
作者单位 | 1.Virginia Tech, Dept Biol Syst Engn, Blacksburg, VA 24061 USA; 2.Virginia Tech, Global Change Ctr, Blacksburg, VA 24061 USA; 3.Indiana Univ, Dept Earth & Atmospher Sci, Bloomington, IN USA; 4.Indiana Univ, Sch Publ & Environm Affairs, Bloomington, IN USA |
推荐引用方式 GB/T 7714 | Czuba, Jonathan A.,David, Scott R.,Edmonds, Douglas A.,et al. Dynamics of Surface-Water Connectivity in a Low-Gradient Meandering River Floodplain[J]. WATER RESOURCES RESEARCH,2019,55(3):1849-1870. |
APA | Czuba, Jonathan A.,David, Scott R.,Edmonds, Douglas A.,&Ward, Adam S..(2019).Dynamics of Surface-Water Connectivity in a Low-Gradient Meandering River Floodplain.WATER RESOURCES RESEARCH,55(3),1849-1870. |
MLA | Czuba, Jonathan A.,et al."Dynamics of Surface-Water Connectivity in a Low-Gradient Meandering River Floodplain".WATER RESOURCES RESEARCH 55.3(2019):1849-1870. |
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