Research Article

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

Figure 9

Map of potentiometric surface (hydraulic head contour lines in meters) in rocks of Wolfcampian age, after Nelson et al. ([7], Figure  14A). Hydraulic head ranges from less than 366 m in water wells in northeastern Kansas to greater than 610 m in oil and gas wells in eastern Colorado and southwestern Nebraska. Dots represent well control. Control data for the hydrologic model were taken along 800 km line .