Input Values
10.00 R Recharge rate (permeability rate) (in/hr) Specific yield, Sy (dimensionless)
0.150 Sy default value is 0.15; max value is 0.2 provided that a lab test data is submitted Horizontal hydraulic conductivity (in/hr)
50.00 Kh Kh = 5xRecharge Rate (R) in the costal plan; Kh=R outside the coastal plan 1/2 length of basin (x direction, in feet)
22.670 x 1/2 width of basin (y direction, in feet) 1/2 width of basin (y direction, in feet)
3.830 y Duration of infiltration period (hours) Initial thickness of saturated zone (feet)
5.93 t Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) Maximum groundwater mounding (beneath center of basin at end of infiltration period)
34.00 hi(0) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) Maximum groundwater mounding (beneath center of basin at end of infiltration period)
h(max)\n Δ h(max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) Maximum groundwater mounding (beneath center of basin at end of infiltration period)
Ground-water Distance from center of basin in x Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) Maximum groundwater mounding (beneath center of basin at end of infiltration period)
Mounding, in feet direction, in feet Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) Maximum groundwater mounding (beneath center of basin at end of infiltration period)
0.796 0 0.796
0.765 10 0.765
0.654 20 0.654
0.482 30 0.482
0.376 40 0.376
0.303 50 0.303
0.248 60 0.248
0.204 70 0.204
0.169 80 0.169
0.140 90 0.140
This spreadsheet solving the Hantush (1967) equation for ground-water mounding beneath an infiltration basin is made available to the general public as a convenience for those wishing to replicate values documented in the USGS Scientific Investigations Report 2010-5102 "Groundwater Mounding beneath Hypothetical Stormwater Infiltration Basins" or to calculate values based on user-specified site conditions. Any changes made to the spreadsheet (other than values identified as user-specified) after transmission from the USGS could have unintended, undesirable consequences. These consequences could include, but may not be limited to: erroneous output, numerical instabilities, and violations of underlying assumptions that are inherent in results presented in the accompanying USGS published report. The USGS assumes no responsibility for the consequences of any changes made to the spreadsheet. If changes are made to the spreadsheet, the user is responsible for documenting the changes and justifying the results and conclusions.