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REGIONAL ESTIMATES OF ACID MINE DRAINAGE IMPACT ON STREAMS IN THE MID-ATLANTIC AND SOUTHEASTERN UNITED STATES
Citation:
Herlihy, A., P.R. Kaufmann, M. Mitch, AND D. Brown. REGIONAL ESTIMATES OF ACID MINE DRAINAGE IMPACT ON STREAMS IN THE MID-ATLANTIC AND SOUTHEASTERN UNITED STATES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-90/193 (NTIS PB91116831), 1990.
Description:
The U.S. Environmental Protection Agency conducted the National Stream Survey (NSS) to provide unbiased estimates of the numbers and distribution of acidic and low acid neutralizing capacity streams in the Mid-Atlantic and Southeastern united States. he NSS employed a probability sample of 500 stream reaches to represent a target population of 64,300 stream reaches in the study area. ll NSS Samples were screened for acid mine drainage (AMD) influences, and population estimates of the regional extent,of AMP impacts were made. lmost 10% of the streams reaches in the Northern Appalachians subregion were acidic during spring baseflow due to AMP. n the entire NSS an estimated 4590 km(=1670) of streams (2% of the total NSS length) were acidic due to AMP and another 5780 km(=2090) of streams were strongly impacted, but not acidic. n subregions of the NSS with observed mine drainage effects, roughly the same number of streams were acidic during spring baseflow due to AMD as due to acidic deposition. he population estimates of mine drainage impact made in the NSS were similar to estimates made in previous surveys that attempted to census all of the streams in coal producing areas. hese results demonstrate that a statistically based stream survey is a useful tool for evaluating regional water quality.
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REGIONAL ESTIMATES OF ACID MINE DRAINAGE IMPACT ON STREAMS IN THE MID-ATLANTIC AND SOUTHEASTERN UNITED STATES