Browsing by Subject "Low Impact Development"
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Item Open Access Impacts of green infrastructure implementation within the Neuse River Basin(2015-04-24) Green, BenjaminAmerican Rivers is advocating for implementation of Green Infrastructure (GI) as a stormwater management strategy within the City of Raleigh. Incorporation of GI into future development plans is an appealing option for growing urban centers to minimize their impact upon surrounding aquatic ecosystems. Since Raleigh lies outside the regulatory boundary of the Falls Lake Nutrient Strategy, there is not a significant driver in place to encourage a shift towards GI. This study provided American Rivers with estimates of potential scale of GI retrofit implementation within a highly developed stormwater drainage basin, as well as the benefits those retrofits would provide in terms of nutrient load and peak flow reductions from stormwater flow. This was accomplished through the development of a GIS tool that identifies potential GI retrofit locations within Raleigh stormwater drainage basins, expediting the retrofit field reconnaissance process. The outputs of this tool were then incorporated into PLOAD, a GIS-based pollutant load modeling application for watershed-scale management, which provided estimates of mass loading rates of TN, TP, and TSS. The study area consisted of 11 subcatchments within Pigeon House Branch stormwater drainage basin (3200 acres, ~32% mean impervious coverage). Estimated annual pollutant load reductions resulting from GI implementation were 0.67, 9.92, and 16.82 tons of TP, TN, and TSS, respectively, although the accuracy of these numbers is questionable due to the coarse scale at which PLOAD operates. Ideally, other modeling efforts can be applied within this study’s framework to produce more informed scenarios within other drainage basins throughout the Neuse River Basin.Item Open Access The Emerging Importance of Stormwater Management with a Focus on the City of Philadelphia(2012-04-18) Erickson-Ludwig, AlistarOver 80 percent of the population of the United States lives in cities. The large population coupled with a dense built environment means that cities are generally at a higher risk for the negative consequences of polluted water. Philadelphia is a dense urban city with two major waterways flowing through it. As a city with a large population and large percentage of developed land, flood control and water quality are two major issues facing the City. In 2006, the Philadelphia Water Department passed a regulation requiring new development and redevelopment projects to manage stormwater runoff. An assessment was completed to understand why particular stormwater management practices were chosen in various private development projects throughout Philadelphia and learn the positives and negatives of managing them.