||Alkalinity Regulation in Softwater Florida Lakes.
Baker, L. A.;
Pollman, C. D.;
Eilers, J. M.;
||Northrop Services, Inc./Environmental Sciences, Corvallis, OR. ;KBN Engineering and Applied Sciences, Inc., Gainesville, FL. ;Minnesota Univ., Minneapolis. Dept. of Civil and Mining Engineering.;Corvallis Environmental Research Lab., OR.
Air water interactions;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Major ion chemistry data collected as part of the Environmental Protection Agency (EPA) Eastern Lake Survey was examined to evaluate the mechanisms and extent of alkalinity regulation in 37 undisturbed, softwater lakes in Florida. Comparison of major ion-Cl ratios in atmospheric deposition and in lakewater shows the reactions resulting in retention of sulfate and nitrate are the dominant sources of alkalinity; production of organic acids and ammonium retention are the major alkalinity-consuming processes. Based on average reactions, enrichment of major cations accounted for only 12% of net alkalinity generation in the study lakes. In general, calcium and potassium were depleted in low ANC lakes, presumably by in-lake sinks, and were enriched in most higher ANC lakes by groundwater inputs. Differences in alkalinity among these lakes reflect hydrologic factors and the proximity of clay and carbonate deposits to the lake bed. Overall, net alkalinity generation nearly balanced H+ predicted from evaporative concentration of atmospheric acid inputs; the close balance suggests that the alkalinity status of these lakes is very sensitive to changes in atmospheric loadings and groundwater alkalinity inputs. (Copyright (c) 1988 by the American Geophysical Union.)
||Pub. in Jnl. of Water Resources Research, v24 n7 p1069-1082 Jul 88. Prepared in cooperation with KBN Engineering and Applied Sciences, Inc., Gainesville, FL., and Minnesota Univ., Minneapolis. Dept. of Civil and Mining Engineering. Sponsored by Corvallis Environmental Research Lab., OR.
|NTIS Title Notes
||Reprint: Alkalinity Regulation in Softwater Florida Lakes.
||48G; 68D; 99F
||PC A03/MF A01