Aquifer Transmissivity and Hydraulic Conductivity Calculator
Calculate aquifer transmissivity, Darcy flow velocity, and groundwater discharge using standard hydrogeology formulas.
Transmissivity T = K × b (m²/day) Where K = hydraulic conductivity (m/day) and b = saturated aquifer thickness (m). Transmissivity describes how easily water flows horizontally through the full aquifer thickness.
Darcy Velocity q = K × i (m/day) Where i = hydraulic gradient (dimensionless head loss per unit length). This is the average velocity of water through the porous medium.
Volumetric Flow (Darcy’s Law) Q = K × i × A (m³/day) Where A = cross-sectional area = b × W (m²) and W = flow width (m).
Hydraulic Conductivity Classification Gravel: >100 m/day | Coarse sand: 10–100 | Medium sand: 1–10 | Fine sand: 0.1–1 | Silt: 0.001–0.1 | Clay: <0.001 m/day