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Open-File Report 2009–1275

Groundwater Conditions and Studies in the Brunswick–Glynn County Area, Georgia, 2008

Prepared in cooperation with the City of Brunswick and Glynn County

Gregory S. Cherry, Michael F. Peck, Jaime A. Painter, and Welby L. Stayton

ABSTRACT

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The Upper Floridan aquifer is contaminated with saltwater in a 2-square-mile area of downtown Brunswick, Georgia. This contamination has limited development of the groundwater supply in the Glynn County area. Hydrologic, geologic, and water-quality data are needed to effectively manage water resources. Since 1959, the U.S. Geological Survey has conducted a cooperative water program with the City of Brunswick to monitor and assess the effect of groundwater development on saltwater contamination of the Floridan aquifer system.

During calendar year 2008, the cooperative water program included continuous water-level recording of 12 wells completed in the Floridan, Brunswick, and surficial aquifer systems; collecting water levels from 21 wells to map the potentiometric surface of the Upper Floridan aquifer during July 2008; and collecting and analyzing water samples from 26 wells to map chloride concentrations in the Upper Floridan aquifer during July 2008. Equipment was installed on 3 wells for real-time water level and specific conductance monitoring. In addition, work was continued to refine an existing groundwater-flow model for evaluation of water-management scenarios.

First posted January 19, 2010

For additional information contact:
Director, Georgia Water Science Center
U.S. Geological Survey
3039 Amwiler Rd.
Suite 130
30360-2824
http://ga.water.usgs.gov/

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Suggested citation:

Cherry, G.S., Peck, M.F., Painter, J.A, and Stayton, W.L., 2010, Groundwater conditions and studies in the Brunswick–Glynn County area, Georgia, 2008: U.S. Geological Survey Open-File Report 2009–1275, 54 p.



Contents

Abstract

Introduction

Brunswick–Glynn County Cooperative

Water Program

Purpose and Scope

Acknowledgments

Groundwater Conditions

Groundwater Levels

Factors Influencing Groundwater Levels

Precipitation

Groundwater Pumpage

Surficial Aquifer System

Brunswick Aquifer System

Floridan Aquifer System

Chloride Concentrations

Upper Floridan Aquifer

Real-Time Monitoring of Specific Conductance and Water Levels

Surficial and Brunswick Aquifer Systems

Groundwater Studies

Reports and Technical Presentations

Selected References


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