Groundwater Monitoring and Modeling

The South Carolina Department of Natural Resources (DNR) routinely collects groundwater level data for water-resource assessments and for management and planning purposes. These data are used to identify short- and long-term changes in groundwater levels and storage due to changes in withdrawals, recharge rates, and climatic conditions; to calibrate ground-water flow models; to produce potentiometric maps for the major aquifers in the Coastal Plain Province; and to determine regional hydraulic gradients, and groundwater flow rates and directions of the major aquifers.

Groundwater Newsletter - December 2017

For any questions regarding these activities, please contact a Hydrology Section staff member.

Groundwater Monitoring

Hydrology Staff downloaded and processed water-level data from Clarendon and Richland Counties (SCDNR Region 3), and Dillon, Florence, Lee, Marion, and Williamsburg Counties (SCDNR Region 2).

Groundwater Flow Model

approximate extents of the Crouch Branch aquifer and confining unit

Hydrology Staff have produced new GIS data for aquifer and confining-unit extents to be used in groundwater flow model being developed in cooperation with the USGS.

Previous Newsletters

Groundwater Newsletter - November 2017

For any questions regarding these activities, please contact a Hydrology Section staff member.

New Potentiometric Maps Available

potentiometric map excerpt from publication

The new report “Potentiometric Surface Maps of the South Carolina Coastal Plain, November–December 2016” by Andrew Wachob, Joseph A. Gellici, and Brooke Czwartacki has been completed and is now available as a pdf file through the Hydrology Section website, or directly through this link.

Groundwater Availability Assessment

screenshot of groundwater recharge map across south carolina

Clemson University facilitated a Groundwater Availability Assessment Stakeholder Meeting at the College of Charleston in North Charleston (Region 4) on 28 November and will be in charge of facilitating future meetings. Presentations were given by hydrology staff on recharge modeling, hydrogeological framework and the status of the state water planning efforts. The next stakeholder meeting will be 14 December at the State Farmer’s Market in Columbia from 2-4 pm.

Groundwater Data Collection

Hydrology Staff downloaded and processed water-level data from Regions 3 (Aiken, Allendale, Barnwell, Calhoun, Lexington, Orangeburg, Richland, and Saluda Counties) and 4 (Colleton, Hampton, and Jasper Counties).

Staff also collected level and conductivity measurements from 8 wells in Region 4 (Charleston, Colleton, and Georgetown Counties). In-field conductivity calibration and general maintenance was completed on In-Situ probes at 5 field sites. Data processing of water-level data including QA/QC, barometric pressure compensation and manual measurement data entry of water levels from Beaufort, Berkeley, Charleston, Colleton, Horry, Georgetown (Region 4), and Williamsburg (Region 3) Counties.

Staff obtained a full suite of geophysical logs from a new public supply well in the Town of Scranton in Florence County (Region 2). Electric and gamma-ray logs were obtained to a depth of 651 feet.

Groundwater Newsletter - July 2017

For any questions regarding these activities, please contact a Hydrology Section staff member.

Groundwater Data Collection

Automatic Data Recorder (ADR )data collection and did manual tape downs were in Aiken, Calhoun, Colleton , Charlesrton, Cherokee, Chesterfield, Darlington, Dillon , Florence, Greenville, Hampton, Jasper, Kershaw, Laurens and Lee Counties.

Telemetry System Installed at Cheraw State Park

A new telemetry system was installed at the Cheraw State Park. The installation will allow for real time monitoring of groundwater conditions. This allows the most up do date information to be used in making decisions such as drought status change. There are currently nine telemetry systems installed across the state. Data from our monitoring well network can be downloaded from the Well Data page. SCDNR also contributes monitoring well data to the USGS National Groundwater Monitoring Network.

New Funding National Groundwater Monitoring Network

The Hydrogeology section has received $108,780 in new funding from the National Groundwater Monitoring Network to expand the statewide groundwater monitoring network. The funds provided in the first year of the two year award will allow for the completion of a two new monitoring wells. One well will be installed in the McQueen Branch Aquifer the Creston well cluster site in Calhoun County the other well will be installed in the Crouch Branch aquifer well in the Andrews area of Georgetown County.

Funds provided in the second year will be used to install up to 10 water table monitoring wells in the coastal plain to monitor the effects climate variation, land use change and usage have on the surficial aquifer system. Data from these wells could be used by the South Carolina Drought Committee in their decision-making process.

Tidal Corrections

this coastal well is located near salt marsh and is affected by the tides

Work is underway in the Coastal office to calculate tidal corrections for wells used in the South Carolina monitoring network. The calculation of tidal efficiencies will allow the recorded water levels to be corrected to account for the current tidal conditions. This will improve the accuracy of maps made along the coastal areas of the state. The work is funded through a cooperative effort with the USGS under the National Groundwater Monitoring Network program.

Core Described for SCDOT

615-ft core that was drilled by the Department of Transportation for a bridge construction project near the Town of Andrews (Williamsburg County, Region 2). The core penetrated 228 feet of Cenozoic sediments, mainly of Paleocene age, and 387 feet of Mesozoic sediments (all Late Cretaceous). Geologic formations from a core in St. Stephen were correlated with those of the newly drilled core hole.

a section of core

Groundwater Newsletter - June 2017

For any questions regarding these activities, please contact a Hydrology Section staff member.

Groundwater Data Collection

hydrograph

ADR hourly data and manual measurements were collected in Allendale, Aiken, Barnwell, Lexington, Richland, Clarendon, Williamsburg, Florence, Sumter, and Orangeburg counties (Regions 2, 3). In addition, QA/QC on downloaded data and processed information into ADR database for Allendale, Barnwell, Lexington, Richland, Clarendon, Sumter and Williamsburg Counties.

Data from our monitoring well network can be downloaded from the Well Data page. SCDNR also contributes monitoring well data to the USGS National Groundwater Monitoring Network

Groundwater Planning

image provided by DHEC.

Staff reviewed the final draft of DHEC’s groundwater management plan for the Trident Area (Charleston, Berkeley, and Dorchester Counties). The plan was modified to address many of the comments previously submitted by the Hydrogeology Section and has been presented to and approved by the DHEC Board.

Groundwater Recharge Modeling

image of recharge modeling output

A recharge model from that will estimate recharge rates from 1979 to 2016 in Aiken County is being developed. Outputs form the recharge model will be to be used as input into the Aiken County Groundwater model.

National Ground-Water Monitoring Network (NGWMN)

A part of the DNR’s Hydrogeology Sections participation in the NGWMN, lithology data from paper files are being entered into an electronic format. To date, over 12,000 description intervals have been entered.

Groundwater Newsletter - May 2017

For any questions regarding these activities, please contact a Hydrology Section staff member.

Potentiometric Map Updates

screenshot of a part of a potentiometric map

New potentiometric maps are being developed for all three major aquifers in South Carolina. Water levels have been measured across the SC coastal plain. Data analysis and contouring are underway. When completed, the potentiometric mapping run will help with the understanding of the current condition of the three aquifers and will be valuable resource for detecting change in groundwater levels through time.

Current published potentiometric maps are available for download on the Hydrology Publications page.

Real-Time Groundwater Monitoring System Installed

an example of a SCDNR telemetry system

A new telemetry system was installed at a well-cluster site in at Aiken State Park in Aiken County. The telemetry system will relay groundwater levels in real-time to SCDNR hydrologists, who will use the data for quickly assessing drought conditions.

Data continue to be collected from ADR devices in wells through the state, data were collected in 10 counties this month.

Data from our monitoring well network can be downloaded from the Well Data page. SCDNR also contributes monitoring well data to the USGS National Groundwater Monitoring Network

New Monitoring Well in Aiken Co.

map of windsor well in aiken county, sc

A monitoring well was drilled at Oakwood-Windsor Elementary School in Aiken Co. for the purpose of monitoring groundwater levels in the Gordon aquifer. The well was drilled to a depth of 170 feet and was outfitted with an automated data recorder (ADR). The ADR records the water levels every hour. The data are downloaded regularly by SCDNR hydrologist and added to the groundwater monitoring database. A gamma-ray log was collected at the new well, which will help to characterize the sediments at the well.

Hydrogeologic Modeling

Work continued on modeling the hydrogeologic framework of the coastal plain. Fourteen new well profiles, which describe the lithology and stratigraphy, or types and layers of sediments present were generated. The well profiles will be incorporated into cross-sections of the coastal plain.