DOI: 10.1007/s10533-013-9926-1
Scopus记录号: 2-s2.0-84907547766
论文题名: Contrasting influences of stormflow and baseflow pathways on nitrogen and phosphorus export from an urban watershed
作者: Janke B.D. ; Finlay J.C. ; Hobbie S.E. ; Baker L.A. ; Sterner R.W. ; Nidzgorski D. ; Wilson B.N.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 121, 期: 1 起始页码: 209
结束页码: 228
语种: 英语
英文关键词: Baseflow
; Nitrogen
; Phosphorus
; Storm drains
; Urban biogeochemistry
; Urban hydrology
Scopus关键词: baseflow
; biogeochemistry
; eutrophication
; groundwater-surface water interaction
; nitrogen
; phosphorus
; storm
; streamflow
; watershed
英文摘要: Eutrophication of urban surface waters from excess nitrogen (N) and phosphorus (P) inputs remains a major issue in water quality management. Although much research has focused on understanding loading of nutrients from storm events, there has been little research to understand the contribution of baseflow, the water moving through storm drains between rainfall events. We investigated the relative contributions of baseflow versus stormflow for loading of water and nutrients (various forms of N and P) by the storm drain network in six urban sub-watersheds in St. Paul, MN, USA. Across sites, baseflow made substantial contributions to warm season (May–October) water yields (27–66 % across sites), total N yields (31–68 %), and total P yields (7–32 %). These results show that while P was predominantly delivered by stormflow, N loading was similar between baseflow and stormflow. We found that baseflow was dominated by groundwater inputs, likely caused by interception of shallow groundwater by storm drains, but also that variability in N and P among sites was related in part to the connectivity of the storm drains to upstream lakes and wetlands in some watersheds. The substantial loading by groundwater-dominated baseflow, especially for N, implies that N management may require a broader focus on N source reduction, perhaps through improved land management, in order to prevent contamination of shallow groundwater via infiltration. © 2013, Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83648
Appears in Collections: 气候减缓与适应 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, MN, United States; Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, United States
Recommended Citation:
Janke B.D.,Finlay J.C.,Hobbie S.E.,et al. Contrasting influences of stormflow and baseflow pathways on nitrogen and phosphorus export from an urban watershed[J]. Biogeochemistry,2014-01-01,121(1)