Abstract
Three lake-watersheds in the Adirondack Mountains of New York State, underlain by similar granitic bedrock and receiving similar levels of acidic deposition, were found to have very different surface water alkalinities. The chemical differences appear to be due to differences in the unconsolidated surficial materials in the basins. Woods Lake watershed (mean lake outlet pH of 4.7) is covered by thin till with many interspersed bedrock outcrops. The thinness of these surficial deposits (average depth 2 m) limits the amount of deep percolation of water and thus contact with alkalinity-producing inorganic horizons. In contrast, Panther Lake watershed (mean lake outlet pH of 6.2) is covered by thick glacial till (average depth 24 m). Here more of the precipitation comes in contact with the alkalinity-producing materials. Sagamore Lake watershed is much larger and has areas of both thick and thin deposits and lake outlet pH values intermediate to those of Woods and Panther lakes.
The soils in all three watersheds are dominated by quartz, potassium feldspar and sodic plagioclase with minor amounts of hornblende and other heavy minerals. The dominant clay mineral is vermiculite. Chemical evidence suggests the present rate of mineral weathering is less than the long-term rate in Woods Lake watershed while in Panther, the present rate may have increased relative to the long-term rate.
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April, R. A., Newton, R. M., and Truettner, L.: 1985, ‘Chemical Weathering in Two Adirondack Watersheds: Past and Present-day Rates’, Geol. Soc. Amer. Bull. (in review).
April, R. A. and Newton, R. M.: 1983, Soil Science 135, 301.
Galloway, J. N., Schofield, C. L., Hendrey, G. R., Altwicker, E. R., and Troutman, D. E.: 1981, ‘An Analysis of Lake Acidification Using Annual Budgets’, in The Integrated Lake-Watershed Acidification Study (ILWAS): Contributions to the Int. Conf. on the Ecol. Impact of Acid Dep. EPRI Interim Report, Palo Alto, CA.
Gherini, S. A., Mok, L., Hudson, R. J. M., Davis, G. F., Chen, C. W., and Goldstein, R. A.: 1985, Water, Air, and Soil Pollut. 26, 425 (this issue).
Hendrey, G. R., Galloway, J. N., Norton, S. A., Schofield, C. L., Burns, D. A., and Schaffer, P. W.: 1980, ‘Sensitivity of the Eastern United States to Acid Precipitation Impacts on Surface Waters’, in D. Drablos and A. T. Tollan (eds.), Proc. of Int. Conf. Ecolog. Impacts Acid Precip. Norway, SNSF Project.
Jackson, M. L.: 1974, Soil Chemical Analysis: Advanced Course, University of Wisconsin, Department of Soil Science, Madison, WI. 895 pp.
Johannes, A. H. and Altwicker, E. R.: 1981, ‘Atmospheric Inputs to Three Adirondack Lake-Watersheds’, in The Integrated Lake-Watershed Acidification Study (ILWAS): Contributions to the Int. Conf. on the Ecol. Impact of Acid Dep. EPRI Interim Report, Palo Alto, CA.
Johannes, A. H., Altwicker, E. R., and Clesceri, N. L.: 1985, Water, Air, and Soil Pollut. 26, 339 (this issue).
Johnson, N. M., Reynolds, R. C., and Likens, G. E.: 1977, Science 177, 514.
Likens, G. E., Bormann, H. R., Pierce, R. S., Eaton, J. S., and Johnson, N. M.: 1977, Biogeochemistry of a Forested Ecosystem, Springer Verlag, NY. 146 pp.
Newton, R. M. and April, R. H.: 1982, Northeastern Environmental Science 1, 143.
Parnell, R. A.: 1981, ‘Aluminum Migration and Chemical Weathering in Subalpine and Alpine Soils and Tills. Mt. Moosilauke, New Hampshire: The Effects of Acid Rain’, Ph.D. 7dissertation, Dartmouth Colanne, Hanover, NH. 285 pp.
Peters, N. E. and Murdock, P.S.: 1985, Water, Air, and Soil Pollut. 26, 387 (this issue).
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April, R., Newton, R. Influence of geology on lake acidification in the ILWAS Watersheds. Water Air Soil Pollut 26, 373–386 (1985). https://doi.org/10.1007/BF00280692
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DOI: https://doi.org/10.1007/BF00280692