Changes in long-term water quality of Baltimore streams are associated with both gray and green infrastructure

Alexander J. Reisinger, Ellen Woytowitz, Emily Majcher, Emma J. Rosi, Kenneth T. Belt, Jonathan Duncan, Sujay S. Kaushal, Peter M. Groffman

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The steadily rising global urban population has placed substantial strain on urban water quality, and this strain is projected to increase for the foreseeable future. Considerable attention has been given to the hydrological and physico-chemical effects of urbanization on stream ecosystems. However, due to the relative infancy of the field of urban ecology, long-term water quality analyses in urban streams are sparse. Using a 15-yr stream chemistry monitoring record from Baltimore, Maryland, we quantified long-term trends in nitrate, phosphate, total nitrogen, total phosphorus, chloride, and sulfate export at several sites along a rural–urban gradient. We found no significant change in solute export at most sites, although we did find specific patterns of interest for certain solutes. For example, nitrogen export declined at the most headwater urban site, while phosphorus export declined at the most downstream urban site. Coupling long-term monitoring with data on gray and green infrastructure management throughout the landscape, we established relationships between solute export at the most downstream urban monitoring site and sanitary sewer overflows (SSOs), best management practice (BMP) implementation, and road salt application rates. Phosphorus export was correlated with BMP implementation in the watershed, whereas nitrogen export was related to SSOs. Despite highly urbanized watersheds, water quality does not appear to be declining at most of these sites, suggesting that current management may have limited further impairment. Results of our study suggest that both gray and green infrastructure are key for maintaining and improving water quality in this highly urbanized watershed.

Original languageEnglish (US)
Pages (from-to)S60-S76
JournalLimnology and Oceanography
Volume64
DOIs
StatePublished - Jan 1 2019

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green infrastructure
water quality
infrastructure
sewage systems
solutes
solute
best management practices
urban site
best management practice
watershed
phosphorus
monitoring
nitrogen
urban population
landscape management
infancy
urbanization
headwater
application rate
roads

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Aquatic Science

Cite this

Reisinger, Alexander J. ; Woytowitz, Ellen ; Majcher, Emily ; Rosi, Emma J. ; Belt, Kenneth T. ; Duncan, Jonathan ; Kaushal, Sujay S. ; Groffman, Peter M. / Changes in long-term water quality of Baltimore streams are associated with both gray and green infrastructure. In: Limnology and Oceanography. 2019 ; Vol. 64. pp. S60-S76.
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Reisinger, AJ, Woytowitz, E, Majcher, E, Rosi, EJ, Belt, KT, Duncan, J, Kaushal, SS & Groffman, PM 2019, 'Changes in long-term water quality of Baltimore streams are associated with both gray and green infrastructure', Limnology and Oceanography, vol. 64, pp. S60-S76. https://doi.org/10.1002/lno.10947

Changes in long-term water quality of Baltimore streams are associated with both gray and green infrastructure. / Reisinger, Alexander J.; Woytowitz, Ellen; Majcher, Emily; Rosi, Emma J.; Belt, Kenneth T.; Duncan, Jonathan; Kaushal, Sujay S.; Groffman, Peter M.

In: Limnology and Oceanography, Vol. 64, 01.01.2019, p. S60-S76.

Research output: Contribution to journalArticle

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