Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR021859 |
Contextualizing Wetlands Within a River Network to Assess Nitrate Removal and Inform Watershed Management | |
Czuba, Jonathan A.1; Hansen, Amy T.2; Foufoula-Georgiou, Efi3; Finlay, Jacques C.4 | |
2018-02-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:2页码:1312-1337 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Aquatic nitrate removal depends on interactions throughout an interconnected network of lakes, wetlands, and river channels. Herein, we present a network-based model that quantifies nitrate-nitrogen and organic carbon concentrations through a wetland-river network and estimates nitrate export from the watershed. This model dynamically accounts for multiple competing limitations on nitrate removal, explicitly incorporates wetlands in the network, and captures hierarchical network effects and spatial interactions. We apply the model to the Le Sueur Basin, a data-rich 2,880 km(2) agricultural landscape in southern Minnesota and validate the model using synoptic field measurements during June for years 2013-2015. Using the model, we show that the overall limits to nitrate removal rate via denitrification shift between nitrate concentration, organic carbon availability, and residence time depending on discharge, characteristics of the waterbody, and location in the network. Our model results show that the spatial context of wetland restorations is an important but often overlooked factor because nonlinearities in the system, e.g., deriving from switching of resource limitation on denitrification rate, can lead to unexpected changes in downstream biogeochemistry. Our results demonstrate that reduction of watershed-scale nitrate concentrations and downstream loads in the Le Sueur Basin can be most effectively achieved by increasing water residence time (by slowing the flow) rather than by increasing organic carbon concentrations (which may limit denitrification). This framework can be used toward assessing where and how to restore wetlands for reducing nitrate concentrations and loads from agricultural watersheds. |
英文关键词 | watershed-scale nitrate model organic carbon wetland connectivity regime shift denitrification |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428474500036 |
WOS关键词 | DISSOLVED ORGANIC-CARBON ; GULF-OF-MEXICO ; GEOGRAPHICALLY ISOLATED WETLANDS ; CONTERMINOUS UNITED-STATES ; MISSISSIPPI RIVER ; AGRICULTURAL WATERSHEDS ; NITROGEN-RETENTION ; LAND-USE ; CONSTRUCTED WETLANDS ; AQUATIC ECOSYSTEMS |
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/21172 |
专题 | 资源环境科学 |
作者单位 | 1.Virginia Tech, Dept Biol Syst Engn, Blacksburg, VA 24061 USA; 2.Univ Minnesota, St Anthony Falls Lab, Minneapolis, MN USA; 3.Univ Calif Irvine, Dept Civil & Environm Engn, Irvine, CA USA; 4.Univ Minnesota, Dept Ecol Evolut & Behav, Minneapolis, MN USA |
推荐引用方式 GB/T 7714 | Czuba, Jonathan A.,Hansen, Amy T.,Foufoula-Georgiou, Efi,et al. Contextualizing Wetlands Within a River Network to Assess Nitrate Removal and Inform Watershed Management[J]. WATER RESOURCES RESEARCH,2018,54(2):1312-1337. |
APA | Czuba, Jonathan A.,Hansen, Amy T.,Foufoula-Georgiou, Efi,&Finlay, Jacques C..(2018).Contextualizing Wetlands Within a River Network to Assess Nitrate Removal and Inform Watershed Management.WATER RESOURCES RESEARCH,54(2),1312-1337. |
MLA | Czuba, Jonathan A.,et al."Contextualizing Wetlands Within a River Network to Assess Nitrate Removal and Inform Watershed Management".WATER RESOURCES RESEARCH 54.2(2018):1312-1337. |
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