Geofluids

Research Article

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

Table 7

Sensitivity analysis (OM: order of magnitude, Og: Ogallala, Lbf: Laramide Basin Fill, Dak: Dakota, Wolfc: Wolfcampian, Virg: Virgilian).
  in m/d ( = 0.1 ) in m3/1,000 yr in Wolfcampian at 200 km, in m in Wolfcampian at 200 km, % changeSee figure
Base case 474.51 × 10−6119.900 
Og, Lbf, Dak1 × 10−6     
Wolfc, Virg,5 × 10−4     
Desmoinesian,5 × 10−3     
Mississippian5 × 10−3     
OM increase in of aquifers:   89.21−25.6 Figure 23
Wolfc, Virg,1 × 10−3     
Desmoinesian,1 × 10−2     
Mississippian1 × 10−2     
OM decrease in of aquifers:   200.03+66.83 Figure 24
Wolfc, Virg,1 × 10−4     
Desmoinesian,1 × 10−3     
Mississippian1 × 10−3     
2 OM higher in Og, Lbf, Dak1 × 10−4  109.167−8.95 Figure 27
Double in west 949.0 152.05+26.81 Figure 21
Halve in west 237.3 96.73−19.33 Figure 22
1 OM higher   1 × 10−5200.67+67.36 Figure 25
1 OM lower   1 × 10−774.96−37.48 Figure 26