Rebecca Hale
Sources and transport of nitrogen in arid urban watersheds
Hale, Rebecca; Turnbull, Laura; Earl, Stevan; Grimm, Nancy; Riha, Krystin; Michalski, Greg; Lohse, Kathleen; Childers, Dan
Authors
Laura Turnbull
Stevan Earl
Nancy Grimm
Krystin Riha
Greg Michalski
Kathleen Lohse
Dan Childers
Contributors
Dr Laura Turnbull-Lloyd laura.turnbull@durham.ac.uk
Other
Abstract
Urban watersheds are often sources of nitrogen (N) to downstream systems, contributing to poor water quality. However, it is unknown which components (e.g., land cover and stormwater infrastructure type) of urban watersheds contribute to N export and which may be sites of retention. In this study we investigated which watershed characteristics control N sourcing, biogeochemical processing of nitrate (NO3–) during storms, and the amount of rainfall N that is retained within urban watersheds. We used triple isotopes of NO3– (δ15N, δ18O, and Δ17O) to identify sources and transformations of NO3– during storms from 10 nested arid urban watersheds that varied in stormwater infrastructure type and drainage area. Stormwater infrastructure and land cover—retention basins, pipes, and grass cover—dictated the sourcing of NO3– in runoff. Urban watersheds were strong sinks or sources of N to stormwater depending on runoff, which in turn was inversely related to retention basin density and positively related to imperviousness and precipitation. Our results suggest that watershed characteristics control the sources and transport of inorganic N in urban stormwater but that retention of inorganic N at the time scale of individual runoff events is controlled by hydrologic, rather than biogeochemical, mechanisms.
Citation
Hale, R., Turnbull, L., Earl, S., Grimm, N., Riha, K., Michalski, G., …Childers, D. (2014). Sources and transport of nitrogen in arid urban watersheds. Environmental Science and Technology, 48(11), 6211-6219. https://doi.org/10.1021/es501039t
Journal Article Type | Article |
---|---|
Publication Date | Jun 3, 2014 |
Deposit Date | May 7, 2014 |
Publicly Available Date | Oct 27, 2014 |
Journal | Environmental Science and Technology |
Print ISSN | 0013-936X |
Electronic ISSN | 1520-5851 |
Publisher | American Chemical Society |
Peer Reviewed | Peer Reviewed |
Volume | 48 |
Issue | 11 |
Pages | 6211-6219 |
DOI | https://doi.org/10.1021/es501039t |
Public URL | https://durham-repository.worktribe.com/output/1455517 |
Files
Accepted Journal Article
(1.2 Mb)
PDF
Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science and Technology, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/es501039t.
You might also like
(Dis)connectivity in hydro-geomorphic systems - emerging concepts and their applications
(2023)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search