Tag Archives: potentiometric contours

The Floridan Aquifer in North Carolina 1996-01-01

Is Columbia, South Carolina, in the Floridan Aquifer?

Doesn’t look like it. But thanks for the question.

[Does the Floridan Aquifer include Columbia, SC? Apparently not. Nor the Tertiary sand aquifer.]
Does the Floridan Aquifer include Columbia, SC? Apparently not. Nor the Tertiary sand aquifer.

A WWALS member shared a post from Congaree Riverkeeper, asking,

“the Floridan Aquifer source, or terminus? Anyway, in S.C….”

The Congaree Riverkeeper post said:

We got out and did river patrol on the Broad River the other day.

We were able to check on a few projects happening along the river, including the construction of the City of Columbia’s new drinking water intake….

The Broad River comes down south into Columbia, SC, where it joins the Congaree River. Lake Murray just to the west of Columbia is easy to recognize on many of the other maps below. Continue reading →

USGS warns Withlacoochee River already leaks into Floridan Aquifer

There’s a reason Valdosta’s water wells are 400 feet deep. Its earlier, shallower wells were sucking up Withlacoochee River water that still leaks into groundwater. Should we risk a fracked methane pipeline digging under that same river and possibly causing more sinkholes and underground movement of contaminants, some perhaps coming from the pipeline itself or its demands for pressure testing water?

Sustainability of Ground-water Resources, by William M. Alley Thomas E. Reilly O. Lehn Franke, 1 January 1999, U.S. Department of the Interior, U.S. Geological Survey – Publisher. In Box E on Page 63:

The Connection Between Surface-Water Quality and Ground-Water Quality in a Karst Aquifer


Figure E-1. Estimated percentage of Withlacoochee River water in ground water in the Upper Floridan aquifer, June 1991. (Modified from Plummer and others, 1998.)
The Upper Floridan aquifer, which is the sole source of water supply for Valdosta, Georgia, and much of the surrounding area, receives large volumes of direct discharge from the Withlacoochee River through sinkholes in the streambed or off-channel. A highly interconnected conduit system has developed Continue reading →