Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Identifying Regional BMP Retrofit Opportunities
NPDES municipal stormwater permits are based on an iterative BMP approach to reduce the discharge of pollutants from storm drainage systems to the Maximum Extent Practicable (MEP) and to protect beneficial uses of receiving waters. Municipal permits and the regulated agencies' stormwater management programs have typically focused on implementation of site-specific or activity-specific BMPs to meet the MEP standard for surface runoff pollution prevention or reduction (e.g. structural BMPs required to be incorporated into new development projects or source control BMPs required to be implemented by municipal maintenance staff). However, as municipal permits and programs move toward watershed-based BMP implementation, there must be greater consideration for regional watershed BMPs in addition to the site-by-site BMPs that are typically considered. In particular, the regional watershed approach should include a process for identifying and evaluating the feasibility of implementing regional treatment BMPs for existing developed areas of a watershed. This paper discusses studies conducted to identify and prioritize potential structural retrofitting opportunities within the existing drainage infrastructure in developed areas of several Southern California watersheds. A Geographical Information System (GIS) model was used to initially identify possible retrofit locations that satisfied desired search criteria. Field reconnaissance of preliminary sites identified by the GIS model was then conducted to refine site information and focus on technical feasibility by considering site-specific factors that might preclude a successful retrofit project. A list of potential retrofit BMPs was developed based on technical feasibility, life cycle cost and constituents of concern in the receiving waters. Conceptual BMP designs and cost estimates were prepared for the top ranked sites. A framework was developed to define an optimal range of watershed area for retrofit based on previous studies and considering construction economies of scale and expected benefits.
Identifying Regional BMP Retrofit Opportunities
NPDES municipal stormwater permits are based on an iterative BMP approach to reduce the discharge of pollutants from storm drainage systems to the Maximum Extent Practicable (MEP) and to protect beneficial uses of receiving waters. Municipal permits and the regulated agencies' stormwater management programs have typically focused on implementation of site-specific or activity-specific BMPs to meet the MEP standard for surface runoff pollution prevention or reduction (e.g. structural BMPs required to be incorporated into new development projects or source control BMPs required to be implemented by municipal maintenance staff). However, as municipal permits and programs move toward watershed-based BMP implementation, there must be greater consideration for regional watershed BMPs in addition to the site-by-site BMPs that are typically considered. In particular, the regional watershed approach should include a process for identifying and evaluating the feasibility of implementing regional treatment BMPs for existing developed areas of a watershed. This paper discusses studies conducted to identify and prioritize potential structural retrofitting opportunities within the existing drainage infrastructure in developed areas of several Southern California watersheds. A Geographical Information System (GIS) model was used to initially identify possible retrofit locations that satisfied desired search criteria. Field reconnaissance of preliminary sites identified by the GIS model was then conducted to refine site information and focus on technical feasibility by considering site-specific factors that might preclude a successful retrofit project. A list of potential retrofit BMPs was developed based on technical feasibility, life cycle cost and constituents of concern in the receiving waters. Conceptual BMP designs and cost estimates were prepared for the top ranked sites. A framework was developed to define an optimal range of watershed area for retrofit based on previous studies and considering construction economies of scale and expected benefits.
Identifying Regional BMP Retrofit Opportunities
Bonigut, Tom (Autor:in) / Taylor, Scott (Autor:in)
World Water and Environmental Resources Congress 2005 ; 2005 ; Anchorage, Alaska, United States
01.07.2005
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Hydraulics , Hydrology , Wastewater management , Pollutants , International factors , Water distribution systems , Groundwater management , Wetlands , Water resources , California , Water management , Water supply , Best Management Practice , Watersheds , Stormwater management , Irrigation , Climate change