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POLLUTANT BUILD UP & RUN OFF ON HIGHWAYS; EXPANDING THE CURRENT METHODOLOGY FOR ADDITIONAL DETERMINANDS
Author(s) -
Patel Junaid,
Drieu Olivier
Publication year - 2005
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.2005.tb01590.x
Subject(s) - outfall , environmental science , surface runoff , pollutant , environmental engineering , water quality , downstream (manufacturing) , current (fluid) , pollution , hydrology (agriculture) , engineering , chemistry , ecology , operations management , electrical engineering , geotechnical engineering , biology , organic chemistry
Pollutants build up on highways and are washed off during a rainfall event; and are usually discharged via an outfall to a watercourse. CIRIA report 142 (1994) guidance for evaluating wafer quality downstream of a highway outfall considers only copper and zinc in the water quality assessment of highway outfalls; determinands thought to occur in significant concentrations in highway runoff. This guidance has since been adopted in the Design Manual for Roads and Bridges environmental assessment. However, recent investigations suggest that other determinands may occur in unacceptably high concentrations. This paper demonstrates that additional determinands should be considered in the water quality assessment downstream of a highway outfall.