Factors Influencing Dissolved Copper Concentrations in Oregon Highway Stormwater Runoff Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/fx719n16j

This is the author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Society of Civil Engineers and can be found at:  http://ascelibrary.org/journal/joeedu.

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  • Factors Influencing Dissolved Copper Concentrations in Oregon Highway Storm Water Runoff
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  • Highway stormwater runoff represents a significant source of dissolved copper to surface waters. It is well established that even low concentrations of dissolved copper can be toxic to many aquatic organisms. In the Pacific Northwest of the United States, recent research has focused on the effects of low-level copper exposure to salmonids listed as threatened or endangered under the Endangered Species Act (ESA). In light of these recent studies, increasingly stringent guidelines for the discharge of highway stormwater runoff have been imposed as part of ESA assessments of transportation projects. Assessing factors that may impact dissolved copper concentrations in stormwater provides a practical framework for predicting when and where copper toxicity could be problematic. A stormwater sampling effort was performed to examine the influence of site locale, traffic density, storm hydrology, the “first-flush” effect, and water quality parameters on measured dissolved copper concentrations in highway stormwater runoff. In general, runoff from urban/high traffic sites and “first-flush” samples exhibited higher copper concentrations than other samples. Increased dissolved copper concentrations were highly correlated with both dissolved organic carbon (DOC) and alkalinity. However, multiple linear regression modeling suggests that only the correlation with DOC has the potential to be causative. These findings will h 18 elp inform State and Federal transportation and environmental protection agencies regarding the conditions under which elevated copper concentrations (and potential copper toxicity) are most likely to occur.
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  • Nason, J. A., Bloomquist, D. J., & Sprick, M. S. (2012). Factors influencing dissolved copper concentrations in oregon highway storm water runoff. Journal of Environmental Engineering, 138(7), 734.
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  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2013-03-06T19:15:23Z No. of bitstreams: 1 NasonJeffreyChemicalBiologicalEnvironmentalEngineeringFactorsInfluencingDissolved.pdf: 374329 bytes, checksum: ff63f01e6c79fee9ad8f18712968507d (MD5)
  • description.provenance : Approved for entry into archive by Deanne Bruner(deanne.bruner@oregonstate.edu) on 2013-03-06T19:20:09Z (GMT) No. of bitstreams: 1 NasonJeffreyChemicalBiologicalEnvironmentalEngineeringFactorsInfluencingDissolved.pdf: 374329 bytes, checksum: ff63f01e6c79fee9ad8f18712968507d (MD5)
  • description.provenance : Made available in DSpace on 2013-03-06T19:20:09Z (GMT). No. of bitstreams: 1 NasonJeffreyChemicalBiologicalEnvironmentalEngineeringFactorsInfluencingDissolved.pdf: 374329 bytes, checksum: ff63f01e6c79fee9ad8f18712968507d (MD5) Previous issue date: 2012-07

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