FAS Abstracts 2004 Meeting Page

Geological & Hydrological Sciences (GHS): GHS-1

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Defining springshed boundaries and water-quality domains near First-Magnitude Springs in North Florida. S.B. UPCHURCH, K.M. CHAMPION, J.C. SCHNIEDER (1), D. HORNSBY (2), R. CERYAK (2), and W. ZWANKA (2).  (1) SDII Global Corp., Tampa, FL 33634, (2) Suwannee River Water Management District, Live Oak, FL 32060. Structural analysis and kriging were used to contour high-resolution water-level and water-quality data collected near Ichetucknee and Manatee-Fannin Springs. Results from the analysis suggest that the potentiometric surface of the Upper Floridan aquifer can be contoured with a high level of certainty when monitor wells are spaced within 5 - 10 miles of each other. Nitrate data can be contoured if monitor wells are spaced no further than 1 - 2 miles apart. Using a complete suite of chemical variables, several water-quality domains were also identified in the Ichetucknee Springs ground-water basin. The combined approach allows for more accurate springshed delineation and identification of spring influence zones.