Sub-bottom acoustic record for Lake Balboa with corresponding interpretation. Research is ongoing. This is because thick accumulations of impermeable mud in the bottoms of some lakes prevents lake water from seeping downward into the underlying aquifer. Interestingly, these parameters have not been measured beneath any sinkhole lakes in Lowndes County. It is difficult to measure the thickness of lake sediment and depth to bedrock beneath sinkhole lakes.
Direct measurements are possible by recovering core from the lake-bed.
An alternative approach is to measure these parameters indirectly by conducting a series of acoustic surveys. However, we were successful in obtaining up to 25 m of sub-bottom penetration at Lake Balboa. Analysis of these data is ongoing.