HR: 0800h
AN: H21B-1006    [Abstracts]
TI: Characterizing Stream-Aquifer Interaction at an Acid Mine Drainage Site
AU: * Ahlfeld, D
EM: ahlfeld@ecs.umass.edu
AF: Dept. of Civil and Environmental Engineering, University of Massachusetts, Amherst, MA 01003 United States
AU: Sengupta, A
EM: ashmita@acad.umass.edu
AF: Dept. of Civil and Environmental Engineering, University of Massachusetts, Amherst, MA 01003 United States
AU: Lin, Y
EM: yi.chang.lin@duke.edu
AF: Dept. of Civil and Environmental Engineering, University of Massachusetts, Amherst, MA 01003 United States
AB: The acid mine drainage site at Davis Mine in Rowe, Massachusetts, has been studied over several years. The site has been inactive for nearly 100 years but still exhibits pyrite oxidation and microbially mitigated sulfate reduction. A major feature of the site is a stream which passes over and through aging tailings piles. Understanding the hydraulic connection between the stream and the surrounding groundwater is critical to analyzing oxidation and reduction processes. The stream emanates from a spring at a mine shaft opening and travels several hundred meters before joining a larger stream. Data has been collected continuously and episodically from the stream and several wells located nearby. Data includes water levels, streamflow, pH, sulfate and other chemical signatures of the oxidation and reduction reactions. Analysis of the data is presented and approaches to estimating hydraulic properties between the stream and the aquifer are discussed.
DE: 1806 Chemistry of fresh water
DE: 1829 Groundwater hydrology
DE: 1831 Groundwater quality
DE: 1860 Runoff and streamflow
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting