A GEOCHEMICAL AND HYDROLOGICAL INVESTIGATION OF THE REDMOND CREEK KARST AQUIFER OF WAYNE COUNTY, SOUTHEAST KENTUCKY
Seasonal trends in the variability of water chemistry are present at both sites from late May 2010 through late November 2010. At Sandy Springs we see a drop in pH accompanied by an increase in both SpC and Alk. Over the same time period at Stream Cave pH increases, accompanied by decreasing SpC and increasing Alk. Seasonal trends are also seen in ion concentration. For example, Ca is becoming more dilute at both sites as seasonal precipitation increases.
Spatial variation is also present in the data, with water chemistry evolving from Stream Cave to Sandy Springs. Additionally, water chemistry at Stream Cave is more variable than at Sandy Springs. The pH at Sandy Springs, for example, averages 7.75 with a range of 7.1 to 7.91, compared to an average of 7.3 at Stream Cave with a range of 6.4 to 8.03. At Sandy Springs we see much higher Alk (mean = 95.36mg/L; range = 75.5 to 130.5mg/L) compared to Stream Cave (mean = 15.82 mg/L; range = 10.5 to 23.5 mg/L). SpC is also much higher at Sandy Springs (mean = 238 µS/cm; range = 197 to 296 µS/cm) compared to Stream Cave (mean = 44.69µS/cm; range = 31 to 65 µS/cm).