Abstract
The Experimental Watershed Liming Study (EWLS) evaluated the application of CaCO3, to a forested watershed to mitigate the acidification of surface water. During October 1989, 6.9 Mg CaCC3/ha was applied by helicopter to two subcatchments of about 50% (102.5 ha) of the Woods Lake watershed area. The EWLS team investigated the response to treatment of soils (chemistry and microbial processes), vegetation, wetland, stream and lake waters, and phytoplankton and fish, and applied the Integrated Lake Watershed Acidification (ILWAS) model in predicting a watershed treatment duration of up to 50 years. Observations showed a gradual change in pH, acid neutralizing capacity (ANC) and Ca2+ in the water column; direct lake additions of CaCO3 (three different times) were characterized by abrupt changes following base addition and subsequent rapid reacidification. Moreover, the watershed treatment eliminated the snowmelt acidification of the near-shore region of the lake observed during direct lake treatments. Positive ANC water in the tributary and near-shore area improved conditions for fish reproduction and for a viable fish population. Budgets for 12-month periods before and after the watershed treatment showed that the lake shifted from a source of ANC to a sink due to retention of elevated inputs of Ca2+ from the watershed CaCO3 application.
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References
Blette, V. L. and R. M. Newton. 1995b. Application of the Integrated Lake-Watershed Acidification Study model to watershed liming at Woods Lake, NY. Biogeochemistry. In Press.
Brocksen, R. W., et al.. 1992. Practical Guide to Managing Acidic Surface Waters and Their Fisheries. Lewis Publ., Chelsea, MI USA. 190 p.
Cirmo, C. P. and C. T. Driscoll. 1995. The impacts of watershed CaCO3 treatment on stream and wetland biogeochemistry in the Adirondack Mountains. Biogeochemistry. In Press.
Dalziel, T. R. K., E. J., Wilson, and M. V., Procter. 1994. The effectiveness of catchment liming in restoring acid waters at Loch fleet, Calloway, Scotland. Forest Ecol. Mange. 68:107–117.
Driscoll, C. T., et al. 1995. The experimental watershed liming study (EWLS): comparison of lake and watershed neutralization stretegies. Biogeochemistry. In Press.
Gherini, S. A., et al. 1985. The ILWAS model: Formulation and application. 26:425–459.
Henrikson, L. and Y. W., Brodin. 1995. Liming of Acidified Surface Waters. A Swedish Synthesis. Springer-Verlag, Berlin, Germany. 458 p.
Newton, R. M., D. A. Burns, D. A. Blette, and C. T. Driscoll. 1995. Effect of whole catchment liming on the episodic acidification of two Adirondack streams. Biogeochemistry. In Press.
Porcella, D. B. et al. 1989. Mitigation of Acidic Conditions in Lakes and Streams. In Vol. 4. Acid Precipitation — Environ. Aspects (editors, Norton, S. A. et al.) Springer-Verlag, NY. pp. 159–186.
Schofield, C. L. and C. Keleher. 1995. Comparison of brook trout reproductive success and recruitment in an acidic Adirondack lake following whole lake liming and watershed liming. Biogeochemistry. In Press.
Schofield, C. L. et al. 1991. Population dynamics of brook trout (Salvelinus fontinalis) during maintenance liming of an acidic lake. Water, Air, Soil Pollut. 59:41–53
Traan, T. S., T. Frogner, A. Hindar, E. Kleiven, A. Lande, and R. F. Wright. 1995. Whole-catchment liming at Tjonnstrond, Norway: an 11-year record. This Conference.
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Porcella, D.B., Driscoll, C.T., Schofield, C.L. et al. Lake and watershed neutralization strategies. Water Air Soil Pollut 85, 889–894 (1995). https://doi.org/10.1007/BF00476942
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DOI: https://doi.org/10.1007/BF00476942