Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Green Stormwater Retrofits: Objectives and Costing
With the issuance by the State of Maryland of its 2010 stormwater permit, Montgomery County (Montgomery) was required to retrofit 20% of its older, untreated or poorly treated impervious surfaces by 2015. In January 2012, the County released its final strategy for meeting this retrofit goal. The strategy includes using Environmental Site Design (ESD), or green infrastructure, for 18% of its retrofit obligations, with the bulk of the remainder to be achieved through stormwater pond retrofits. Unit costs for some innovative green retrofits are lower than others, and different mixes of green practices can be applied to different land cover categories. Using alternative mixes of these innovative green practices and independent local cost data, a back-of-the-envelope analysis indicates that it may be possible – and affordable – to apply green stormwater retrofit practices to more than half of the Anacostia Watershed’s targeted 1421 impervious acres in Montgomery County. A new unit cost metric, dollars per Acre-inch of runoff reduced, is introduced. Examination of an alternative green retrofit scenario for Montgomery’s Anacostia watershed area suggests that this approach merits further in-depth consideration, both for Montgomery County and for other stormwater permittees facing similar imperviousness restoration mandates.
Green Stormwater Retrofits: Objectives and Costing
With the issuance by the State of Maryland of its 2010 stormwater permit, Montgomery County (Montgomery) was required to retrofit 20% of its older, untreated or poorly treated impervious surfaces by 2015. In January 2012, the County released its final strategy for meeting this retrofit goal. The strategy includes using Environmental Site Design (ESD), or green infrastructure, for 18% of its retrofit obligations, with the bulk of the remainder to be achieved through stormwater pond retrofits. Unit costs for some innovative green retrofits are lower than others, and different mixes of green practices can be applied to different land cover categories. Using alternative mixes of these innovative green practices and independent local cost data, a back-of-the-envelope analysis indicates that it may be possible – and affordable – to apply green stormwater retrofit practices to more than half of the Anacostia Watershed’s targeted 1421 impervious acres in Montgomery County. A new unit cost metric, dollars per Acre-inch of runoff reduced, is introduced. Examination of an alternative green retrofit scenario for Montgomery’s Anacostia watershed area suggests that this approach merits further in-depth consideration, both for Montgomery County and for other stormwater permittees facing similar imperviousness restoration mandates.
Green Stormwater Retrofits: Objectives and Costing
Cameron, Diane M. (Autor:in) / Zeidler, Jon T. (Autor:in) / Sheveiko, Danila S. (Autor:in)
2011 Low Impact Development Conference ; 2011 ; Philadelphia, Pennsylvania
15.01.2015
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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