Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR022993 |
Dynamic Hyporheic Zones: Exploring the Role of Peak Flow Events on Bedform-Induced Hyporheic Exchange | |
Singh, Tanu1; Wu, Liwen2,3; Gomez-Velez, Jesus D.4; Lewandowski, Joerg2,3; Hannah, David M.1; Krause, Stefan1 | |
2019 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:1页码:218-235 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Germany; USA |
英文摘要 | Discharge varies in space and time, driving hyporheic exchange processes in river corridors that affect biogeochemical cycling and ultimately control the dynamics of biogeochemical hot spots and hot moments. Herein, we use a reduced-order model to conduct the systematic analysis of the interplay between discharge variability (peak flow intensities, duration, and skewness) and streambed topography (bedform aspect ratios and channel slopes) and their role in the flow and transport characteristics of hyporheic zones (HZs). We use a simple and robust conceptualization of single peak flow events for a series of periodic sinusoidal bedforms. Using the model, we estimate the spatial extent of the HZ, the total amount of exchange, and the residence time of water and solutes within the reactive environment and its duration relative to typical time scales for oxygen consumption (i.e., a measure of the denitrification potential). Our results demonstrate that HZ expansion and contraction is controlled by events yet modulated by ambient groundwater flow. Even though the change in hyporheic exchange flux (%) relative to baseflow conditions is invariant for different values of channel slopes, absolute magnitudes varied substantially. Primarily, peak flow events cause more discharge of older water for the higher aspect ratios (i.e., for dunes and ripples) and lower channel slopes. Variations in residence times during peak flow events lead to the development of larger areas of potential nitrification and denitrification in the HZ for longer durations. These findings have potential implications for river management and restoration, particularly the need for (re)consideration of the importance of hyporheic exchange under dynamic flow conditions. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459536500012 |
WOS关键词 | DISSOLVED ORGANIC-CARBON ; HYDROLOGIC EXCHANGE ; RESIDENCE TIMES ; STORM EVENTS ; BED FORMS ; STREAM ; GROUNDWATER ; DISCHARGE ; IMPACT ; WATER |
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/22009 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham, W Midlands, England; 2.Leibniz Inst Freshwater Ecol & Inland Fisheries, Dept Ecohydrol, Berlin, Germany; 3.Humboldt Univ, Geog Dept, Berlin, Germany; 4.Vanderbilt Univ, Dept Civil & Environm Engn, Nashville, TN 37235 USA |
推荐引用方式 GB/T 7714 | Singh, Tanu,Wu, Liwen,Gomez-Velez, Jesus D.,et al. Dynamic Hyporheic Zones: Exploring the Role of Peak Flow Events on Bedform-Induced Hyporheic Exchange[J]. WATER RESOURCES RESEARCH,2019,55(1):218-235. |
APA | Singh, Tanu,Wu, Liwen,Gomez-Velez, Jesus D.,Lewandowski, Joerg,Hannah, David M.,&Krause, Stefan.(2019).Dynamic Hyporheic Zones: Exploring the Role of Peak Flow Events on Bedform-Induced Hyporheic Exchange.WATER RESOURCES RESEARCH,55(1),218-235. |
MLA | Singh, Tanu,et al."Dynamic Hyporheic Zones: Exploring the Role of Peak Flow Events on Bedform-Induced Hyporheic Exchange".WATER RESOURCES RESEARCH 55.1(2019):218-235. |
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