Input Values
1.00 R Recharge rate (permeability rate) (in/hr)
0.150 Sy Specific yield, Sy (dimensionless)
20.00 Kh default value is 0.15; max value is 0.2 provided that a lab test data is submitted
33.000 x Horizontal hydraulic conductivity (in/hr)
21.000 y Kh = 5xRecharge Rate (R) in the costal plan; Kh=R outside the coastal plan
20.00 t 1/2 length of basin (x direction, in feet)
10.00 hi(0) 1/2 width of basin (y direction, in feet)
12.745 h(max) Duration of infiltration period (hours)
2.745 Δ h(max) Initial thickness of saturated zone (feet)
Ground-water Distance from center of basin in x Maximum thickness of saturated zone (beneath center of basin at end of infiltration period)
Mounding, in feet direction, in feet Maximum groundwater mounding (beneath center of basin at end of infiltration period)
2.745 0 Groundwater Mounding, in feet
2.680 10 Groundwater Mounding, in feet
2.472 20 Groundwater Mounding, in feet
2.086 30 Groundwater Mounding, in feet
1.569 40 Groundwater Mounding, in feet
1.166 50 Groundwater Mounding, in feet
0.864 60 Groundwater Mounding, in feet
0.636 70 Groundwater Mounding, in feet
0.464 80 Groundwater Mounding, in feet
0.335 90 Groundwater Mounding, in feet
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.