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An evaluation of highway stormwater runoff quality in the G.V.R.D. Onwumere, George Chukwudi
Abstract
In the Greater Vancouver Regional District (G.V.R.D.), highway stormwater runoff from bridge decks along the Trans-Canada Highway (#1) in Burnaby and the New Westminster Highway (#91, east-west connector) in Richmond was assessed between 1995 and 1996. Discrete and composite samples of highway stormwater runoff, road dirt, surface soil sediment and grass clipping samples were collected manually from both sites. The stormwater runoff samples were analysed for total suspended solids (T.S.S.), chromium (Cr), nickel (Ni), cadmium (Cd), copper (Cu), iron (Fe), zinc (Zn), manganese (Mn), lead (Pb), calcium (Ca), oil/grease, pH and electrical conductivity (EC). The road dirt, soil sediment and grass clipping samples were analysed only for their metal content. All the parameters in highway stormwater runoff showed differences in seasonal concentration patterns except for Cu and Mn at both sites. However, these differences were not statistically significant at the 95% confidence level. Although concentrations of most pollutants were higher in the winter, LC50 daphnia bioassays were non-toxic. The non-winter Comp "A" runoff samples, on the other hand, had 70% and 57% survival rates after 24 and 48 hours respectively. Most contaminant concentrations exceeded the maximum allowable concentrations (MAC) set for drinking water or freshwater aquatic life protection. Between the two sites, the Burnaby site had higher rainfall amounts and runoff coefficients, thereby generating higher T.S.S., metal and oil/grease concentrations/loadings than the Richmond site. The Burnaby site grass drainage ditch was fairly efficient in its pollutant removal effectiveness which ranged from 48% for Cu to 77% for T.S.S. There were statistically significant differences in pollutant removal efficiencies for all the parameters except for Mn at the 95% confidence level. Pollutant concentrations forecasting, using single regression equations with individual environmental variable, yielded reasonably good predictions for T.S.S., Fe, and Mn at the Burnaby site; and T.S.S., and Ca at the Richmond site. Comparison between discrete sample and flow composite data indicated a significant difference only in the concentration of T.S.S. at the Burnaby site.
Item Metadata
Title |
An evaluation of highway stormwater runoff quality in the G.V.R.D.
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2000
|
Description |
In the Greater Vancouver Regional District (G.V.R.D.), highway stormwater runoff from
bridge decks along the Trans-Canada Highway (#1) in Burnaby and the New Westminster
Highway (#91, east-west connector) in Richmond was assessed between 1995 and 1996.
Discrete and composite samples of highway stormwater runoff, road dirt, surface soil sediment
and grass clipping samples were collected manually from both sites. The stormwater runoff
samples were analysed for total suspended solids (T.S.S.), chromium (Cr), nickel (Ni), cadmium
(Cd), copper (Cu), iron (Fe), zinc (Zn), manganese (Mn), lead (Pb), calcium (Ca), oil/grease, pH
and electrical conductivity (EC). The road dirt, soil sediment and grass clipping samples were
analysed only for their metal content.
All the parameters in highway stormwater runoff showed differences in seasonal
concentration patterns except for Cu and Mn at both sites. However, these differences were not
statistically significant at the 95% confidence level. Although concentrations of most pollutants
were higher in the winter, LC50 daphnia bioassays were non-toxic. The non-winter Comp "A"
runoff samples, on the other hand, had 70% and 57% survival rates after 24 and 48 hours
respectively. Most contaminant concentrations exceeded the maximum allowable concentrations
(MAC) set for drinking water or freshwater aquatic life protection.
Between the two sites, the Burnaby site had higher rainfall amounts and runoff
coefficients, thereby generating higher T.S.S., metal and oil/grease concentrations/loadings than
the Richmond site.
The Burnaby site grass drainage ditch was fairly efficient in its pollutant removal
effectiveness which ranged from 48% for Cu to 77% for T.S.S. There were statistically
significant differences in pollutant removal efficiencies for all the parameters except for Mn at
the 95% confidence level.
Pollutant concentrations forecasting, using single regression equations with individual
environmental variable, yielded reasonably good predictions for T.S.S., Fe, and Mn at the Burnaby
site; and T.S.S., and Ca at the Richmond site. Comparison between discrete sample and flow
composite data indicated a significant difference only in the concentration of T.S.S. at the Burnaby
site.
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Extent |
12891202 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-07-15
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0063736
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2000-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.