Pond Performance Evaluation During Wet Weather Conditions

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dc.acquisition-srcen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorElliott, Cen_US
dc.contributor.authorWhite, Cen_US
dc.contributor.authorBloom, Men_US
dc.contributor.authorRichards, Cen_US
dc.contributor.authorMaldonado, Jen_US
dc.contributor.otherProceedings of the Eighth Biennial State of the Bay Symposium January 23-25, 2007en_US
dc.date.accessioned2010-02-15T16:46:56Z
dc.date.available2010-02-15T16:46:56Z
dc.date.issuedJan. 24, 2007en_US
dc.degreeen_US
dc.description[np]en_US
dc.description-otheren_US
dc.description.abstractUrban areas adjacent to Galveston Bay have been shown to contribute the greatest amount of non-point source pollutants to the bay. Many coastal communities, under Texas Pollutant Discharge Elimination System (TPDES) mandated stormwater management programs are addressing urbanized non-point source pollution through permanent storm water best management practices. Harris County Flood Control District, using partial funding from the Texas Coastal Management Program through the Texas General Land Office, conducted a pond performance evaluation during wet weather conditions to determine the effectiveness and pollutant removal capabilities of a typical dry pond detention facility in the Galveston Bay watershed. The detention facility known as B504-03-00 was located about 10 miles from Galveston Bay and was designed to restrict the post development peak flow arising from the 100-year storm event to the predevelopment peak flow and was not designed to provide water quality benefits. Quality-assured pollutant loading data for 21 water quality parameters were obtained from B504-03-00 to evaluate if any pollutant removal was occurring in the basin that would reduce loadings to the bay. Inflow and outflow from the detention facility was sampled multiple times on a flow-proportional basis, using automated sampling units, to obtain event mean concentration (EMC) data for 17 parameters from rainfall events that occurred from September 2005 to October 2006. Bacteria (E. coli, Fecal coliform and Enterococci) and oil and grease grab samples were also collected for these storm events. The EMC and grab sample inlet and outlet data were compared using statistical analyses. These analyses revealed that none of the 21 parameters monitored at the site showed a statistically significant reduction or increase between the mean inlet value and the mean outlet value. The levels of pollutants draining to the basin were also compared to mean values from the Nationwide Urban Runoff Program (NURP). The levels of pollutants draining to Basin B504-03-00 were found to be comparable to the NURP values, with the exception of suspended solids concentration, which were lower than the national data. The results of this study demonstrated that typical dry detention ponds designed for peak flow reduction may provide little water quality benefits when inlet suspended solids concentrations are low. This evaluation of the B504-03-00 detention facility, which does not include water quality features, will allow future comparison to the performance of basins with water quality features. These future monitoring studies are planned and underway by both HCFCD and Harris County Stormwater Quality Section.en_US
dc.description.urien_US
dc.geo-codeGalveston Bayen_US
dc.history1-21-09 kswen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/18654
dc.latitudeen_US
dc.locationNot available in house - Please contact GBIC for assistanceen_US
dc.longitudeen_US
dc.notesen_US
dc.placeen_US
dc.publisherGalveston Bay Estuary Programen_US
dc.relation.ispartofseries10181.00en_US
dc.relation.urihttp://gbic.tamug.edu/gbeppubs/sobviii/sobviii_rpr.htm#Whiteen_US
dc.scaleen_US
dc.seriesen_US
dc.subjectbacteriaen_US
dc.subjectdetention facilityen_US
dc.subjectnon-point source pollutionen_US
dc.subjectstormwater managementen_US
dc.subjectsuspended solidsen_US
dc.titlePond Performance Evaluation During Wet Weather Conditionsen_US
dc.typeCONFen_US
dc.universityen_US
dc.vol-issueen_US

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