Simulating the Evolution of Fluid Underpressures in the Great Plains, by Incorporation of Tectonic Uplift and Tilting, with a Groundwater Flow Model

Figure 11

Map of potentiometric surface (hydraulic head contour lines in meters) in rocks of Mississippian age, after Nelson et al. ([7], Figure  14E). Hydraulic head decreases from about 366 m in water wells in Missouri and Arkansas to less than 183 m in oil and gas wells in eastern Oklahoma and then increases westward to values greater than 366 m in eastern Colorado. Dots represent well control. Control data for the hydrologic model were taken along 800 km line .