Sources of Pollutants in Urban Areas (Part 1) - Older Monitoring Projects
Information concerning source area runoff characteristics during wet weather events can be very important when developing stormwater management plans that incorporate source area controls, or changes in development patterns. This information is also important when calibrating or testing many stormwater models. Unfortunately, this information is not readily available and can be expensive and tedious to collect. However, a substantial amount of these data have been collected over the past several decades, but are not well known. This chapter, and the next, present summaries of these data, specifically source area sheetflow and particulate quality for a variety of areas. Information is presented for many source areas, including urban wet and dry atmospheric deposition, roofs, urban soils, streets and other pavements. Information showing concentrations of conventional pollutants, heavy metals, and selected organic compounds is summarized for major land use categories. The following chapter summarizes additional source area sheetflow information obtained during detailed projects in Alabama and Wisconsin during the 1990s, and summarizes newer data collected elsewhere.
Much of the information was collected in the 1970s and 1980s as part of stormwater research projects for the EPA. This chapter summarizes source area sheetflow quality data obtained from a number of studies conducted in California, Washington, Nevada, Illinois, Ontario, Colorado, New Hampshire, and New York during 1970s and 1980s. Most of the early data obtained were for street dirt chemical quality as part of street cleaning research projects, but a relatively large amount of parking area runoff and roof runoff quality data was also obtained during these early projects. However, only a few of these studies evaluated a broad range of source areas or land uses.
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