GIS Applications Maintenance

GIS applications will be offline for maintenance beginning at 5:00 PM ET on Friday, May 8. Service is expected to be restored on Sunday, May 10. 

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  • Aquifer Properties
    The Groundwater Program analyzes pumping tests to determine aquifer properties, which describe the capacity of aquifers and wells to produce water., Overview, Pumping tests are the principal means of evaluating aquifer properties such as hydraulic conductivity, transmissivity, and storage coefficient. A pumping test basically involves pumping a well at a constant rate while measuring the drawdown of the well being pumped (single well pumping test) or the drawdowns of both the well being pumped and one or more observation wells located nearby (multiple…, Related Reports, Newcome, Roy, Jr., 1993, Pumping tests of the Coastal Plain aquifers in South Carolina: South Carolina Water Resources Commission Report 174, 52 p., Newcome, Roy, Jr., 2005, Results of pumping tests in the Coastal Plain of South Carolina: South Carolina Department of Natural Resources Water Resources Open-File Report 10, 28 p., Newcome, Roy, Jr., 1997, Well efficiency – Its importance and its calculation, in Contributions to the hydrology of South Carolina: South Carolina Department of Natural Resources Water Resources Report 14, p. 45–47.
  • Groundwater Models
    Groundwater models are used to simulate groundwater flow and assess groundwater availability., Overview, Effective water planning and management requires an accurate assessment of the location and quantity of the State’s groundwater resources. The United States Geological Survey (USGS), in cooperation with SCDES, the South Carolina Department of Environmental Services (SCDES), and the United States Army Corps of Engineers, is developing a computer model to simulate groundwater flow in the Coastal…, andy.wachob@des.sc.gov, ., Project Documents and Related Information, For additional information on the USGS groundwater model, visit the, USGS project website, . For information about stakeholder meetings, please visit, Clemson's stakeholder website, . Geologic Provinces
  • Saltwater Intrusion Monitoring Network
    The Groundwater Program maintains a network of 11 wells to monitor saltwater intrusion along the Coast., Overview, In South Carolina, 20% of the population lives in coastal areas and depends on groundwater for domestic, municipal, or agricultural purposes. Overpumping of groundwater creates localized cones of depression which disrupt natural groundwater flow and allow saltwater to move into aquifers along the coast. Saltwater intrusion has become a problem for some coastal areas in the State that depend on…, Contact Information, For additional information, contact Brooke Czwartacki (, brooke.czwartacki@des.sc.gov, ).
  • Surface Water Program
  • Surface Water Models
    Surface water models are used to simulate surface water conditions and to assess surface water availability., Overview, Effective water planning and management requires an accurate assessment of the State’s surface water resources. To that end, the SCDES has supported the development of surface-water quantity models that simulate the surface water system for each of the, eight major river basins in South Carolina, . The modeling platform is the Simplified Water Allocation Model (SWAM), developed by CDM Smith, Inc. These models will be used to evaluate current and future water availability and will support the development of State and regional water plans. Use the links below to access modeling reports and other documentation for each basin’s SWAM model and to learn more about how the SWAM models were…, Surface Water Models, SCDES has publicly released the Simplified Water Allocation Models (SWAM) for the Broad, Edisto, Pee Dee, Salkehatchie, Saluda, and Savannah river basins., Download SWAM Models, Edisto SWAM Model Virtual Training Workshops, View Workshop #1, View Workshop #2, Stakeholder Engagement Process, In collaboration with SCDNR, Clemson University led a stakeholder engagement process during the development of the SWAM models. Two stakeholder meetings were held in each basin and were designed to educate stakeholders on the purpose and functionality of the SWAM models, answer questions about the models, and solicit stakeholder feedback. For more information about the stakeholder engagement…, Clemson’s stakeholder website, ., SWAM Model Documentation, Planning Basins
  • Surface Water Monitoring Initiatives
  • Streamflow Monitoring Workshops
  • The next Upper Savannah River Basin Council Meeting Scheduled for June 12th, 2024
    May 21, 2024 The next Upper Savannah River Basin Council meeting has been scheduled for June 12th, 2024, from 10:00 AM to 2:00 PM (, draft agenda, ) at the Starr and Iva Water Sewer District Office (, 104 Roy Arnold Rd. Starr, SC 29684, ). The public may attend in-person or virtually. For meeting access information, please contact Scott Harder (, harders@dnr.sc.gov, ) or Alexis Modzelesky (, ModzeleskyA@dnr.sc.gov, ).
  • The next Lower Savannah-Salkehatchie River Basin Council Meeting Scheduled for June 6th, 2024
    May 21, 2024 The next Lower Savannah-Salkehatchie River Basin Council meeting has been scheduled for June 6th, 2024, from 10:00 AM to 2:00 PM (, draft agenda, ) at the Stanley Arts Center in Hampton, SC (, 105 Lee Avenue, Hampton, SC 29924, ). The public may attend in-person or virtually. For meeting access information, please contact Scott Harder (, harders@dnr.sc.gov, ) or Alexis Modzelesky (, ModzeleskyA@dnr.sc.gov, ).
  • Next Broad River Basin Council Meeting Scheduled for May 30th, 2024
    May 21, 2024 The next Broad River Basin Council meeting has been scheduled for May 30th, 2024, from 10:00 AM to 2:00 PM (, draft agenda, ). The Council will meet virtually. For meeting access information, please contact Scott Harder (, harders@dnr.sc.gov, ) or Alexis Modzelesky (, ModzeleskyA@dnr.sc.gov, ).