Eighty-nine small streams within the Potomac River Basin were sampled once during the summer months from 1993 to 1995. Streams were selected to include smaller order streams with watersheds of 5 to 20 square miles, draining representative land uses of each subunit. Selection was non-random, using a geographical information system (GIS), followed by a field reconnaissance to locate accessible streams. The number of streams sampled in each land use is roughly proportional to the amount of that land use present within the subunit. Streamwater was analyzed for suspended sediment, major inorganics, nutrients, gross organics, and pesticides. Stream habitat was characterized.
Twenty-seven streams were sampled in the Great Valley Carbonate subunit in 1993 and 1994. Twenty-five streams in the Piedmont subunit, and twelve streams in the Triassic Lowlands subunit were sampled in 1994. Twenty-five streams in the Valley and Ridge subunit were sampled in 1995.
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Great Valley Carbonate | ||
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Piedmont | ||
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Triassic Lowlands | ||
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| description of data | download stream reach data | |
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* Viewing data displays selected analytes only. The download data contains all analytes for which samples were analyzed.