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Surface- and Groundwater Interactions with Lake Panasoffkee. Location. Background. Lake Panasoffkee is the largest lake in the Withlacoochee River basin. Major headwater of the Withlacoochee River. Groundwater inflow is a large component of the lake’s water budget. Shallow Hydrogeology.
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Background • Lake Panasoffkee is the largest lake in the Withlacoochee River basin. • Major headwater of the Withlacoochee River. • Groundwater inflow is a large component of the lake’s water budget.
Objective Assess the hydraulic connection between Lake Panasoffkee and the underlying Upper Floridan aquifer
Approach • Establish areas of recharge/discharge potential to the Upper Floridan aquifer. • Calculate the lake water budget. • Determine the water chemistry of the lake, tributaries, springs, and groundwater system.
May 2008 Recharge/Discharge Potential
September 2008 Recharge/Discharge Potential
Water Budget Stream and Rain Gages
Water Budget Stream and Spring Gages
Water Budget Evaporation Raft
Water Budget Seepage Run – March ‘07 10/11/2010 13
Water Budget 10/11/2010 14
Approach – Hydraulic Connection Water Chemistry
Water Chemistry Major Ions
Water Chemistry Strontium Isotopes
Water Chemistry Conceptual Model
Products http://fl.water.usgs.gov/publications/recentpubs