Drainage Report

8.000 6.000 4.000 2.000 0.000 0 10 20 30 40 50 60 70 80 90 100 Disclaimer 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.

Input Values 0.45 R Recharge rate (permeability rate) (in/hr) Specific yield, Sy (dimensionless) Basin 2-Overall 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) 0.45 Kh Kh = 5xRecharge Rate (R) in the coastal plain; Kh=R outside the coastal plain R = 0.45 in/hr 110.000 x 1/2 length of basin (x direction, in feet) 135.000 y 1/2 width of basin (y direction, in feet) Kh = 0.45 in/hr 58.73 t Duration of infiltration period (hours) 10.00 hi(0) Initial thickness of saturated zone (feet) t = 58.73 hrs. 24.682 h(max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) 14.682 Δh(max) Maximum groundwater mounding (beneath center of basin at end of infiltration period) Distance from Ground-water center of basin in x Mounding, in feet direction, in feet 14.682 0 14.682 10 Re-Calculate Now 14.682 20 14.682 30 Groundwater Mounding, in feet 14.680 40 14.800 14.672 50 14.638 60 14.600 14.522 70 14.400 14.180 80 14.200 13.320 90 14.000 13.800 13.600 13.400

13.800 13.600 13.400 13.200 0 10 20 30 40 50 60 70 80 90 100 Disclaimer 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.

Input Values 0.37 R Recharge rate (permeability rate) (in/hr) Specific yield, Sy (dimensionless) Basin 3 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) 0.37 Kh Kh = 5xRecharge Rate (R) in the coastal plain; Kh=R outside the coastal plain R = 0.37 in/hr 17.500 x 1/2 length of basin (x direction, in feet) 63.500 y 1/2 width of basin (y direction, in feet) Kh = 0.37 in/hr 47.66 t Duration of infiltration period (hours) 10.00 hi(0) Initial thickness of saturated zone (feet) t = 47.66 hrs. 18.470 h(max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) 8.470 Δh(max) Maximum groundwater mounding (beneath center of basin at end of infiltration period) Distance from Ground-water center of basin in x Mounding, in feet direction, in feet 8.470 0 7.432 10 Re-Calculate Now 3.733 20 0.977 30 Groundwater Mounding, in feet 0.176 40 9.000 0.024 50 8.000 0.005 60 0.003 70 7.000 0.003 80 6.000 0.003 90 5.000 4.000 3.000

6.000 0.003 90 5.000 4.000 3.000 2.000 1.000 0.000 0 10 20 30 40 50 60 70 80 90 100 Disclaimer 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.

Input Values 0.31 R Recharge rate (permeability rate) (in/hr) Specific yield, Sy (dimensionless) Basin 4 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) 0.31 Kh Kh = 5xRecharge Rate (R) in the coastal plain; Kh=R outside the coastal plain R = 0.31 in/hr 12.000 x 1/2 length of basin (x direction, in feet) 129.000 y 1/2 width of basin (y direction, in feet) Kh = 0.31 in/hr 71.59 t Duration of infiltration period (hours) 10.00 hi(0) Initial thickness of saturated zone (feet) t = 71.59 hrs. 18.395 h(max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) 8.395 Δh(max) Maximum groundwater mounding (beneath center of basin at end of infiltration period) Distance from Ground-water center of basin in x Mounding, in feet direction, in feet 8.395 0 6.609 10 Re-Calculate Now 2.601 20 0.692 30 Groundwater Mounding, in feet 0.138 40 9.000 0.023 50 8.000 0.006 60 0.004 70 7.000 0.004 80 6.000 0.004 90 5.000 4.000 3.000

0.004 90 5.000 4.000 3.000 2.000 1.000 0.000 0 10 20 30 40 50 60 70 80 90 100 Disclaimer 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.

Input Values 0.32 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 Basin 5 Horizontal hydraulic conductivity (in/hr) 0.32 Kh Kh = 5xRecharge Rate (R) in the coastal plain; Kh=R outside the coastal plain R = 0.32 in/hr 32.500 x 1/2 length of basin (x direction, in feet) 100.000 y 1/2 width of basin (y direction, in feet) 61.40 t Duration of infiltration period (hours) Kh = 0.32 in/hr 10.00 hi(0) Initial thickness of saturated zone (feet) t = 61.40 hrs. 20.677 h(max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) 10.677 Δh(max) Maximum groundwater mounding (beneath center of basin at end of infiltration period) Distance from Ground-water center of basin in x Mounding, in feet direction, in feet 10.677 0 10.413 10 Re-Calculate Now 9.358 20 6.622 30 Groundwater Mounding, in feet 2.380 40 12.000 0.565 50 0.099 60 10.000 0.015 70 0.005 80 8.000 0.004 90 6.000 4.000 2.000

6.000 4.000 2.000 0.000 0 10 20 30 40 50 60 70 80 90 100 Disclaimer 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.

Input Values 0.31 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 Basin 6 - Emergency Access Road Horizontal hydraulic conductivity (in/hr) 0.31 Kh Kh = 5xRecharge Rate (R) in the coastal plain; Kh=R outside the coastal plain R = 0.31 in/hr 8.000 x 1/2 length of basin (x direction, in feet) 31.250 y 1/2 width of basin (y direction, in feet) 52.10 t Duration of infiltration period (hours) Kh = 0.31 in/hr 10.00 hi(0) Initial thickness of saturated zone (feet) t = 52.10 hrs. 15.382 h(max) Maximum thickness of saturated zone (beneath center of basin at end of infiltration period) 5.382 Δh(max) Maximum groundwater mounding (beneath center of basin at end of infiltration period) Distance from Ground-water center of basin in x Mounding, in feet direction, in feet 5.382 0 3.175 10 Re-Calculate Now 0.833 20 0.142 30 Groundwater Mounding, in feet 0.018 40 6.000 0.004 50 0.003 60 5.000 0.003 70 0.003 80 4.000 0.003 90 3.000 2.000 1.000 0.000 0 10 20 30 40 50 60 70 80 90