Aquifer Recharge Calculator
Estimate groundwater aquifer recharge from rainfall infiltration based on area, rainfall, and soil permeability.
acres
inches
%
Annual Recharge
72.9 acre-feet
Annual Recharge (Gallons)23,759,969 gallons
Daily Average65,096 gallons/day
Households Supplied217 homes
Annual Recharge vs Recharge Area
How to Calculate Aquifer Recharge
Aquifer recharge is the natural or managed process of water percolating into underground aquifers.
Formula
Recharge (acre-feet) = Area * Rainfall * Infiltration % / 12
1 acre-foot = 325,851 gallons
Typical Infiltration Rates
Example Calculation
100 acres of loam soil receiving 35 inches rainfall with 25% infiltration.
- 01Recharge: 100 * 35 * 0.25 / 12 = 72.9 acre-feet
- 02In gallons: 72.9 * 325,851 = 23,762,833 gallons
- 03Daily average: 23,762,833 / 365 = 65,103 gallons/day
- 04Homes served: 65,103 / 300 = 217 homes