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The Coefficient of Permeability is referred as measure of a porous medium's ability to allow fluid to flow through its voids. It quantifies how easily water can move through soil or rock formations.
The calculator uses the formula:
Where:
Explanation: The coefficient of permeability is calculated by dividing the transmissibility by the aquifer thickness. Transmissibility represents the effective hydraulic conductivity multiplied by the aquifer thickness.
Details: Accurate calculation of permeability coefficient is crucial for groundwater flow analysis, well design, contaminant transport studies, and designing effective drainage systems in geotechnical engineering.
Tips: Enter transmissibility in m²/s and aquifer thickness in meters. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is the difference between permeability and transmissibility?
A: Permeability (k) is an intrinsic property of the porous medium, while transmissibility (T) is the product of permeability and aquifer thickness (T = k × b).
Q2: What are typical values for coefficient of permeability?
A: Values range from 10⁻¹² m/s for intact clay to 10⁻¹ m/s for clean gravel. The specific value depends on the soil or rock type.
Q3: Why is aquifer thickness important in permeability calculations?
A: Aquifer thickness directly affects the total flow capacity. Thicker aquifers generally allow more water to flow through them for the same permeability value.
Q4: Can this formula be used for all aquifer types?
A: This formula applies to homogeneous aquifers. For heterogeneous or anisotropic aquifers, more complex calculations may be required.
Q5: What units should be used for accurate results?
A: Use consistent SI units: transmissibility in m²/s, aquifer thickness in meters, resulting in permeability coefficient in m/s.