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Click on “Download PDF” for the PDF version or on the title for the HTML version. If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options. Implementing Bacteria TMDLs, A Case Study in Shellfish WatersPublished by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org Citation: TMDL 2010: Watershed Management to Improve Water Quality Proceedings, 14-17 November 2010 Hyatt Regency Baltimore on the Inner Harbor, Baltimore, Maryland USA 711P0710cd.(doi:10.13031/2013.35735)Authors: Chris Roessler Keywords: Fecal coliform bacteria, TMDLs, shellfish, North Carolina, models, BMPs, implementation, monitoring Fecal coliform TMDLs were developed for three small shellfish areas along the White Oak River in North Carolina. The TMDLs were developed using mechanistic modeling approaches (LSPC and Tidal Prism Model) and called for loading reductions of 14%, 55%, and 70%. Site-specific implementation strategies were developed for each area in an effort to meet the TMDLs. It is possible to quantify the effect of structural BMPs (e.g., bioretention areas and constructed wetlands) but not non-structural BMPs (e.g., landowner education). It appears that the TMDL for Dubling Creek can be met, even though there are few anthropogenic sources of bacteria in the catchment, by installing pet waste stations around a walking trail and retrofitting a pond outlet. However, meeting the TMDLs in the more developed catchments, Boathouse Creek and Hills Bay embayment, appears to be problematic at this stage. Not only would every developed parcel need a retrofit BMP, but apparent wildlife loading in the vicinity of the shellfish waters would need to be reduced. The lone NPDES-permitted source in the area is the North Carolina Department of Transportation (NCDOT). Reductions of 60-72% were sought from NCDOT roads and stormwater pipes in the developed catchments. Since loading from NCDOT property is estimated to compose a minor portion of the total, higher, less achievable, reductions would have minimal effect. (Download PDF) (Export to EndNotes)
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