MODFLOW-2005 model used to Simulate the Evolution of Fluid Underpressures in the Great Plains, by Incorporation of Tectonic Uplift and Tilting

A sequence of nine two-dimensional cross-sectional groundwater models using MODFLOW-2005 was created to study whether underpressures (subhydrostatic heads) in the Paleozoic units underlying the Great Plains of North America are a consequence of Cenozoic uplift of the area. Based on tectonostratigraphic data incorporated into these nine models, we have developed a cumulative uplift history with superimposed periods of deposition and erosion for the Great Plains for the period from 40Ma to the present. Uplift, deposition, and erosion on an 800 kilometer long geologic cross-section extending from northeast Colorado to eastern Kansas is represented in these nine time-stepped geohydrologic models. Sequential solution of the two-dimensional [...]