Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR024004 |
Sediments in Agricultural Reservoirs Act as Sinks and Sources for Nutrients over Various Timescales | |
Shaughnessy, A. R.1,2; Sloan, J. J.3; Corcoran, M. J.3; Hasenmueller, E. A.1 | |
2019-07-01 | |
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:7页码:5985-6000 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Reservoirs along rivers have the potential to act as nutrient sinks (e.g., denitrification and sedimentation) or sources (e.g., decomposition and redox changes), potentially reducing or enhancing nutrient loads downstream. This study investigated the spatial and temporal variability of water and lakebed sediment chemistry for an agricultural reservoir, Carlyle Lake (Illinois, U.S.), to assess the role of sediments as nutrient sinks or sources. Samples were collected across the reservoir over a 2-year period. We measured N- and P-species in water at the sediment-water interface, in sediment porewaters, and loosely bound to sediment exchange sites. Total N, total P, total C, organic matter, Fe, Mn, and grain size were measured in bulk sediments. We observed a strong gradient in sedimentary total N, total P, total C, organic matter, and metals along the reservoir, with the lowest concentrations at the river mouth and the highest concentrations near the dam. Additionally, we did a long-term nutrient mass balance using historical water quality data for streams entering and exiting the reservoir and the reservoir itself. Mass balance calculations showed that Carlyle Lake, on average, removed 2,738 Mg N/year and released 121 Mg P/year over the multidecadal observation period. While N was consistently removed from the system over time, P was initially stored in, but later released from, the reservoir. The subsequent release of legacy P from the reservoir led to higher outgoing, compared with incoming, P loads. Thus, reservoirs in intensively managed landscapes can act as sinks for N but sources for P over decadal timescales. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481444700045 |
WOS关键词 | WATER-QUALITY ; PHOSPHORUS TRANSPORT ; MISSOURI RIVER ; HUMAN IMPACT ; NITROGEN ; LAKES ; EUTROPHICATION ; RETENTION ; DISTRIBUTIONS ; RESTORATION |
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/184866 |
专题 | 资源环境科学 |
作者单位 | 1.St Louis Univ, Dept Earth & Atmospher Sci, St Louis, MO 63103 USA; 2.Penn State Univ, Dept Geosci, University Pk, PA 16802 USA; 3.Natl Great Rivers Res & Educ Ctr, Alton, IL USA |
推荐引用方式 GB/T 7714 | Shaughnessy, A. R.,Sloan, J. J.,Corcoran, M. J.,et al. Sediments in Agricultural Reservoirs Act as Sinks and Sources for Nutrients over Various Timescales[J]. WATER RESOURCES RESEARCH,2019,55(7):5985-6000. |
APA | Shaughnessy, A. R.,Sloan, J. J.,Corcoran, M. J.,&Hasenmueller, E. A..(2019).Sediments in Agricultural Reservoirs Act as Sinks and Sources for Nutrients over Various Timescales.WATER RESOURCES RESEARCH,55(7),5985-6000. |
MLA | Shaughnessy, A. R.,et al."Sediments in Agricultural Reservoirs Act as Sinks and Sources for Nutrients over Various Timescales".WATER RESOURCES RESEARCH 55.7(2019):5985-6000. |
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