TY - JOUR
T1 - Performance of a 'transitioned' infiltration basin Part 1
T2 - TSS, metals, and chloride removals
AU - Natarajan, Poornima
AU - Davis, Allen P.
PY - 2015/9/1
Y1 - 2015/9/1
N2 - The water quality performance of a 'failed' stormwater infiltration basin that has 'transitioned' to a wetpond/wetland has been evaluated over a three-year period. Total suspended solids, heavy metals, and chloride in highway runoff and discharge from the transitioned basin were measured during 38 storm events. The transitioned basin provided significant reductions in TSS Event Mean Concentrations (EMCs) and mass in the runoff. Reductions in metal EMCs generally occurred. Chloride followed a seasonal cycle of high loading and mass export during colder periods, and gradual reductions in both EMCs and mass during other periods. The cumulative mass reductions were 89% TSS, 73% copper, 63% lead, 55% zinc, and 45% chloride for the study period. Combined with the dry-weather water quality in the transitioned basin, the mechanisms of pollutant removal were identified as volume reduction, sedimentation, adsorption, and dilution. The presence of wetpond/wetland features, including hydrophytic vegetation, enhanced the pollutant removal processes.
AB - The water quality performance of a 'failed' stormwater infiltration basin that has 'transitioned' to a wetpond/wetland has been evaluated over a three-year period. Total suspended solids, heavy metals, and chloride in highway runoff and discharge from the transitioned basin were measured during 38 storm events. The transitioned basin provided significant reductions in TSS Event Mean Concentrations (EMCs) and mass in the runoff. Reductions in metal EMCs generally occurred. Chloride followed a seasonal cycle of high loading and mass export during colder periods, and gradual reductions in both EMCs and mass during other periods. The cumulative mass reductions were 89% TSS, 73% copper, 63% lead, 55% zinc, and 45% chloride for the study period. Combined with the dry-weather water quality in the transitioned basin, the mechanisms of pollutant removal were identified as volume reduction, sedimentation, adsorption, and dilution. The presence of wetpond/wetland features, including hydrophytic vegetation, enhanced the pollutant removal processes.
KW - Chloride
KW - Failure
KW - Heavy metals
KW - Infiltration basin
KW - Stormwater control measures (SCMs)
KW - Stormwater runoff
KW - Suspended solids
KW - Water quality
KW - Wetland
KW - Wetpond
UR - http://www.scopus.com/inward/record.url?scp=84946079559&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84946079559&partnerID=8YFLogxK
U2 - 10.2175/106143015X14362865226112
DO - 10.2175/106143015X14362865226112
M3 - Article
C2 - 26182408
AN - SCOPUS:84946079559
SN - 1061-4303
VL - 87
SP - 823
EP - 834
JO - Water Environment Research
JF - Water Environment Research
IS - 9
ER -