Use our Unconfined Aquifer Well Flow Rate Calculator to accurately determine groundwater pumping rates from unconfined aquifers. Input hydraulic conductivity, saturated thicknesses, and observation well distances to quickly estimate well discharge for hydrogeological projects.
Formula:
The Unconfined Aquifer Well Flow Rate (Q) is calculated using the Dupuit-Thiem equation:
Q = (π * K * (h22 - h12)) / ln(r2 / r1)
Where:
- Q = Well Flow Rate (e.g., m3/day, ft3/day)
- π = Pi (approximately 3.14159)
- K = Hydraulic Conductivity (e.g., m/day, ft/day)
- h1 = Saturated thickness at observation well 1 (e.g., m, ft)
- h2 = Saturated thickness at observation well 2 (e.g., m, ft)
- r1 = Distance from pumping well to observation well 1 (e.g., m, ft)
- r2 = Distance from pumping well to observation well 2 (e.g., m, ft)
- ln = Natural logarithm