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Urban Best Management Practices near Burlington, Vermont –USGS, in cooperation with the Vermont Department of Environmental Conservation, assessed the effectiveness of urban best management practice structures, including a wet extended detention facility and a shallow marsh wetland, on Englesby Brook in Burlington, Vermont. The purpose of the best management practices was to reduce high streamflows and phosphorus and suspended-sediment loads and concentrations and to increase low streamflows. Evidence was mixed for the effectiveness of the best management practices in reducing phosphorus and suspended-sediment concentrations and loads during the decade of study. (Full report)
Effects of Storm-Water Management on Streamflow and Water Quality in Dane County, Wisconsin –USGS, in cooperation with the City of Middleton, assessed 30 years of data to evaluate the effectiveness of urban stormwater-management practices by the city of Middleton, Wisconsin. Analysis of streamflow and water-quality data collected on Pheasant Branch demonstrates the relation between the changes in the watershed to the structural and nonstructural best management practices put in place during 1975–2008. A comparison of the data from Pheasant Branch with streamflow and water-quality data collected at other nearby streams was made to assist in the determination of the possible causes of the changes in Pheasant Branch over time. The storm-water-management practices in Middleton have been successful in decreasing the suspended-sediment and total phosphorus loads to Lake Mendota from the Pheasant Branch watershed. The city already has met the 40-percent reduction in total suspended solids required by 2013. (Full report)
Water-quality trends and increasing urban land use near Oklahoma City, Oklahoma –USGS, in cooperation with the City of Oklahoma City, tracked increasing urban land use and water-quality trends in nitrogen, phosphorus and some pesticides from 1999-2009 in parts of the North Canadian River watershed, downstream of Oklahoma City, Oklahoma (Press release; Fact Sheet; USGS report). Increases in concentrations in nitrogen, phosphorus, and some pesticides may have been caused by changes in point-source wastewater discharges, urban development, population growth, streamflow, and/or agricultural activities.
Effects of Stormwater Runoff from Bridges on Streams in North Carolina –USGS, in cooperation with North Carolina Department of Transportation, evaluated brick deck runoff and possible effects on water quality and sediment in streams. The findings provide information needed to select the most efficient best management practice at a bridge construction, replacement, or other highway project site. (USGS report)
Nitrate and wastewater compounds in the Barton Springs Zone, South-Central Texas –USGS, in cooperation with the City of Austin, the City of Dripping Springs, the Barton Springs/Edwards Aquifer Conservation District, the Lower Colorado River Authority, Hays County, and Travis County, released a report characterizing concentrations and isotopic compositions of nitrate and concentrations of wastewater compounds in the Barton Springs zone, and their potential relation to urban development. (Fact sheet, Full report)
Water-quality monitoring in Baltimore, Maryland – USGS, in cooperation with the City of Baltimore, Baltimore County, and Carroll County, Maryland, released a retrospective review of monitoring data from 1981 through 2007 to help identify possible improvements in monitoring for the Baltimore Reservoir system, including Loch Raven, Liberty, and Prettyboy Reservoirs that serve the City of Baltimore, Maryland, and parts of five surrounding counties. Management of the watershed conditions for each reservoir is a shared responsibility by agreement among City, County, and State jurisdictions. The most recent (2005) Baltimore Reservoir Watershed Management Agreement (RWMA) called for continued and improved water-quality monitoring in the reservoirs and selected watershed tributaries.