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Mississippi Embayment Regional Aquifer Study

Approach


The primary tool used to answer questions about ground-water availability will be a ground-water flow model (MODFLOW-2005) that will be constructed using existing data and input information from each State in the area.
A major part of the project will include refinement of the hydrogeologic framework used in previous models in the area. Information from surficial geology maps, structure maps, and geophysical logs of selected borings and wells in the area will be compiled. From these data, a refined hydrogeologic framework and conceptual model will form the basis of the new digital ground-water flow model.

Geophysical Log Sample

Geophysical log showing

  • Natural gamma (in black)
  • Spontaneous potential (blue)
  • Long, short normal resistivity (red, dotted)


Borehole geophysics is one of the tools hydrologists use
to determine the depth and thickness of aquifers.
Drawworks setup Driller's at work

The model will incorporate water-use data from each respective state from predevelopment to present, and calibrated with available ground-water level and streamflow information. The model area boundary crosses eight States and includes approximately 6,000 miles of simulated streams, 130,000 well locations, and 10 primary hydrogeologic units. The simulation period extends from January 1, 1870, to April 1, 2007, for a total of 137 years.

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Page Last Modified: Thursday, 18-Oct-2007 14:47:06 CDT btj