Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR020127 |
Design of Remediation Actions for Nutrient Mitigation in the Hyporheic Zone | |
Moren, I.; Worman, A.; Riml, J. | |
2017-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden |
英文摘要 | Although hyporheic exchange has been shown to be of great importance for the overall water quality of streams, it is rarely considered quantitatively in stream remediation projects. A main driver of hyporheic exchange is the hydraulic head fluctuation along the streambed, which can be enhanced by modifications of the streambed topography. Here we present an analytical 2-D spectral subsurface flow model to estimate the hyporheic exchange associated with streambed topographies over a wide range of spatial scales; a model that was validated using tracer-test-results and measurements of hydraulic conductivity. Specifically, engineered steps in the stream were shown to induce a larger hyporheic exchange velocity and shorter hyporheic residence times compared to the observed topography in Tullstorps Brook, Sweden. Hyporheic properties were used to parameterize a longitudinal transport model that accounted for reactions in terms of first-order decay and instantaneous adsorption. Theoretical analyses of the mitigation effect for nitrate due to denitrification in the hyporheic zone show that there is a Damkohler number of the hyporheic zone, associated with several different stream geomorphologies, that optimizes nitrate mass removal on stream reach scale. This optimum can be limited by the available hydraulic head gradient given by the slope of the stream and the geological constraints of the streambed. The model illustrates the complex interactions between design strategies for nutrient mitigation, hyporheic flow patterns, and stream biogeochemistry and highlights the importance to diagnose a stream prior remediation, specifically to evaluate if remediation targets are transport or reaction controlled. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418736700013 |
WOS关键词 | RESIDENCE TIME DISTRIBUTION ; MISSISSIPPI RIVER NETWORK ; IN-STREAM STRUCTURES ; TRANSIENT STORAGE ; BED FORMS ; RESTORATION STRUCTURES ; NONSORBING SOLUTES ; INSET FLOODPLAINS ; LOWLAND STREAMS ; 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/19966 |
专题 | 资源环境科学 |
作者单位 | Royal Inst Technol, Dept Civil & Architectural Engn, Div Hydraul Engn, Stockholm, Sweden |
推荐引用方式 GB/T 7714 | Moren, I.,Worman, A.,Riml, J.. Design of Remediation Actions for Nutrient Mitigation in the Hyporheic Zone[J]. WATER RESOURCES RESEARCH,2017,53(11). |
APA | Moren, I.,Worman, A.,&Riml, J..(2017).Design of Remediation Actions for Nutrient Mitigation in the Hyporheic Zone.WATER RESOURCES RESEARCH,53(11). |
MLA | Moren, I.,et al."Design of Remediation Actions for Nutrient Mitigation in the Hyporheic Zone".WATER RESOURCES RESEARCH 53.11(2017). |
条目包含的文件 | 条目无相关文件。 |
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