Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025959 |
Filling the Void: The Effect of Stream Bank Soil Pipes on Transient Hyporheic Exchange During a Peak Flow Event | |
Lotts, William Seth; Hester, Erich T. | |
2020-02-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2020 |
卷号 | 56期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The hyporheic zone is the ecotone between stream and river channel flow and groundwater that can process nutrients and improve water quality. Transient hyporheic zones occur in the riparian zone (bank storage or "lung model" exchange) during channel stage fluctuations. Recent studies show that soil pipes are widespread in stream banks and beneath floodplains, creating highly preferential flow between channel and riparian groundwater such that the traditional Darcy model of flow does not apply. We used MODFLOW with the conduit flow package to model a series of stream bank soil pipes and examined soil pipe density (number per m), length, diameter, height above baseflow water surface, connectivity, and matrix hydraulic conductivity on transient particle flow paths and total hyporheic exchange volume (i.e., bank storage) over the course of a peak flow (e.g., storm) event. We found that adding five soil pipes per meter more than doubled hyporheic volume. Soil pipe length was the most important control; adding one 1.5-m-long soil pipe caused a 73.4% increase in hyporheic volume. The effect of increasing soil pipe diameter on hyporheic volume leveled off at similar to 1 cm, as flow limitation switched from pipe flow to pipe-matrix exchange. To validate our approach, we used the model to successfully reproduce trends from field studies. Our results highlight the need to consider soil pipes when modeling, monitoring, or managing bank storage, floodplain connectivity, or hyporheic exchange. |
英文关键词 | riparian floodplains surface-groundwater interaction groundwater modeling preferential flow saturated flow |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000535672800067 |
WOS关键词 | PREFERENTIAL FLOW ; WATERSHED HYDROLOGY ; PESTICIDE TRANSPORT ; CONCEPTUAL-MODEL ; SUBSURFACE FLOW ; CLIMATE-CHANGE ; RIVER-BASIN ; MACROPORES ; HETEROGENEITY ; ZONE |
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/280514 |
专题 | 资源环境科学 |
作者单位 | Virginia Tech, Dept Civil & Environm Engn, Blacksburg, VA 24061 USA |
推荐引用方式 GB/T 7714 | Lotts, William Seth,Hester, Erich T.. Filling the Void: The Effect of Stream Bank Soil Pipes on Transient Hyporheic Exchange During a Peak Flow Event[J]. WATER RESOURCES RESEARCH,2020,56(2). |
APA | Lotts, William Seth,&Hester, Erich T..(2020).Filling the Void: The Effect of Stream Bank Soil Pipes on Transient Hyporheic Exchange During a Peak Flow Event.WATER RESOURCES RESEARCH,56(2). |
MLA | Lotts, William Seth,et al."Filling the Void: The Effect of Stream Bank Soil Pipes on Transient Hyporheic Exchange During a Peak Flow Event".WATER RESOURCES RESEARCH 56.2(2020). |
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