Road salts in urban stormwater: an emerging issue in stormwater management in cold climates

Potential impacts of road salting on the environment have increased by the introduction of certain stormwater management practices. Specific impacts are discussed for four such practices, infiltration facilities, oil and grit separators, stormwater ponds and constructed wetlands. The main concerns a...

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Bibliographic Details
Published in:Water science and technology 2003-01, Vol.48 (9), p.61-70
Main Author: Marsalek, J
Format: Article
Language:English
Subjects:
Artificial wetlands
Biodiversity
Chlorides - analysis
Chlorides - poisoning
Cities
Climate
Cold storage
Cold Temperature
Cold weather
deicers
Environmental risk
Grit
Groundwater
Hazards
Ice
Infiltration
Leaching
Pond construction
Ponds
Risk Assessment
Salting
Separators
Sodium Chloride - analysis
Stormwater
Stormwater management
Trace metals
Waste Disposal, Fluid
Water Movements
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Summary:Potential impacts of road salting on the environment have increased by the introduction of certain stormwater management practices. Specific impacts are discussed for four such practices, infiltration facilities, oil and grit separators, stormwater ponds and constructed wetlands. The main concerns about the hazards of chloride-laden stormwater discharges include contamination of groundwater, leaching out of trace metals, densimetric stratification and poor vertical mixing in ponds, direct and indirect toxic effects, benthic drift and reduced biodiversity. The associated environmental risks need to be reduced by chloride source controls, and prevention of excessive chloride accumulations by appropriate design and operation of stormwater facilities in winter months.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2003.0493