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Use of Stream Chemistry for Monitoring Acidic Deposition Effects in the Adirondack Region of New York

^a U.S. Geological Survey, 425 Jordan Road, Troy, NY 12180
^b 1103 H.J. Patterson Hall, University of Maryland, College Park, MD 20742
^c New York State Adirondack Lakes Survey Corporation, Route 86, Box 296, Ray Brook, NY 12977

View larger version (18K): [in a new window]   Fig. 1. Locations of study watersheds, stream gaging, and deposition monitoring stations used in this analysis.

View larger version (18K): [in a new window]   Fig. 2. Stream flow at Independence River as a function of stream flow at Buck Creek, November 1988 to May 1990.

View larger version (24K): [in a new window]   Fig. 3. Trends in (a) atmospheric wet deposition of SO–24 and (b) pH from 1991 to 2000 at three sites located in Fig. 1.

View larger version (32K): [in a new window]   Fig. 4. (a) Mean daily stream flow at the Donnattsburg gage on the Independence River, on days when stream samples were collected for chemical analysis. (b) Flow record in (a) for values less than 5 m s–1. (c) Mean daily flow at the Donnattsburg gage averaged by month for the entire study period and for 1995.

View larger version (29K): [in a new window]   Fig. 5. Acid-neutralizing capacity (ANC) as a function of mean daily flow at (a) Buck Creek (transformed to flow–1), (b) Bald Mountain Brook (transformed to log10 flow), and (c) Fly Pond outlet (transformed to flow–1).

View larger version (28K): [in a new window]   Fig. 6. Trends in (a) acid-neutralizing capacity (ANC) and (b) residuals of the ANC–flow relation for the study period at Buck Creek.

View larger version (33K): [in a new window]   Fig. 7. Trends in (a) acid-neutralizing capacity (ANC) and (b) residuals of the ANC–flow relation for the study period at Bald Mountain Brook.

View larger version (27K): [in a new window]   Fig. 8. Trends in (a) acid-neutralizing capacity (ANC) and (b) residuals of the ANC–flow relation for the study period at Fly Pond outlet.