How to Use Hydraulic Conductivity Calculator
The Hydraulic Conductivity Calculator turns Darcy’s law into an instant K value.
- Enter the steady flow rate Q measured in the column or field test.
- Provide the cross-section area A of the porous medium perpendicular to flow.
- Enter the head difference Δh across the sample.
- Enter the flow path length L.
- Read K in cm/s, m/day and ft/day in the result panel.
Formula & Theory — Hydraulic Conductivity Calculator
The Hydraulic Conductivity Calculator is based on Darcy’s law:
K = Q · L / (A · Δh)| Symbol | Meaning |
|---|---|
| K | Hydraulic conductivity (m/s) |
| Q | Flow rate through the sample |
| L | Flow path length |
| A | Cross-section area |
| Δh | Head difference across L |
Typical values: gravel 10⁻¹–1 cm/s, clean sand 10⁻³–10⁻² cm/s, silt 10⁻⁵–10⁻⁴ cm/s, clay 10⁻⁹–10⁻⁷ cm/s.
Use Cases for Hydraulic Conductivity Calculator
- Geotechnical engineering — Estimate seepage beneath dams and through embankments.
- Hydrogeology — Sizing pumping wells and groundwater models.
- Civil drainage — Designing infiltration trenches, French drains and subsurface drainage.
- Environmental remediation — Predicting contaminant transport through aquifers.
- Agriculture — Selecting suitable irrigation strategies for different soil textures.