By Richard Field, Scott, Ph.D. Struck, Anthony Tafuir, Michael Ports
''BMP expertise in city Watersheds: present and destiny Directions'' provides examples of assorted present top administration perform (BMP) concepts. it's a compilation of shows from the BMP know-how Symposium: present and destiny instructions, on the 2004 EWRI international Water and Environmental Congress held in Salt Lake urban, Utah from June 28 - July 1, 2004. This publication comprises case reviews and technical info, and information the kingdom of the technological know-how during the presentation of innovative learn in watershed administration. It provides BMP designs in addition to guidance for tracking, opting for, imposing and prices in city watersheds. This publication may be worthy to panorama Architects, urban Planners, Watershed Managers, and Environmental and Civil Engineers
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Extra resources for Bmp Technologies in Urban Watersheds: Current And Future Directions, 2004 Ewri World Water And Environmental Congress Held in Salt Lake City, Utah from June 28- July 1, 2004
Bremerton, wa. uv dininfection at cso treatment facility (disinfection implementation) - The City of Bremerton has recently constructed a CSO treatment facility that uses high-rate clarification, followed by UV disinfection, to treat flows up to 45 MGD. The facility uses a medium-pressure, high-intensity UV system that employs a total of 90 lamps. A 500 kW generator supplies power to the UV system as well as pumps, mixers, and other equipment. The clarification system uses a polyaluminum chloride coagulant.
These data show that while there are cases where microorganism reduction can be achieved to some extent by employing BMPs, BMPs also serve as environments where microorganisms are BMP TECHNOLOGY IN URBAN WATERSHEDS 45 generated, presumably from increased wildlife populations and resuspension of bottom deposits (ASCE, 2002; Kurz, 1998; Winer, 2000). Variability of the data is caused by many factors including stormwater characteristics, BMP design, and environmental factors contributing either to microorganism die-off or surviva Ponds and Wetlands - In some studies, better performance was observed in wet ponds over wetlands while other studies show that wetlands may provide advantages over ponds for indicator microorganism removals.
The modeling analyses indicated the following: Stormwater runoff reduction practices are effective in reducing stormwater runoff within the separate sewer service area. However, some practices, such as downspout disconnections and rain gardens, could potentially increase infiltration and inflow to sanitary sewers. Other practices, such as green roofs, rooftop storage, and bioretention, would reduce runoff without increasing the risk of infiltration and inflow to sanitary sewers. Within the combined sewer service area, most stormwater runoff reduction practices would significantly reduce stormwater flow to the combined system, which could result in reduced combined sewer overflows and a reduction in the amount of stormwater that would be treated at the District wastewater treatment plants.