Maximum Permeability given Coefficient of Permeability for Earth Dam Calculator

Maximum Permeability Formula:

\[ K_o = \frac{k^2}{\mu_r} \]

Intrinsic Permeability (m²):

Permeability Range (m²):

1. What is Maximum Permeability for Earth Dam?

Definition: This calculator determines the intrinsic permeability of soil in earth dams based on the coefficient of permeability and relative permeability.

Purpose: It helps civil engineers assess the maximum permeability of soil used in earth dam construction, considering material properties and tolerance.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ K_o = \frac{k^2}{\mu_r} \]

Where:

\( K_o \) — Intrinsic Permeability (m²)
\( k \) — Coefficient of Permeability of Soil (m/s)
\( \mu_r \) — Relative Permeability (H/m)

Explanation: The square of the coefficient of permeability is divided by the relative permeability to determine the intrinsic permeability.

3. Importance of Permeability Calculation

Details: Proper permeability estimation ensures dam stability, prevents excessive seepage, and helps in selecting appropriate construction materials.

4. Using the Calculator

Tips: Enter the coefficient of permeability (m/s), relative permeability (default 1.3 H/m), and tolerance percentage (default 5%). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What is intrinsic permeability?
A: It's a measure of how easily fluid can flow through porous media, independent of fluid properties.

Q2: How does relative permeability affect the calculation?
A: It accounts for how the presence of multiple fluids affects permeability in the soil.

Q3: Why include a tolerance percentage?
A: It provides a practical range accounting for material variations and measurement uncertainties.

Q4: What's a typical coefficient for earth dams?
A: Typically ranges from 1×10⁻⁹ to 1×10⁻⁴ m/s depending on soil type.

Q5: How is this used in dam design?
A: Helps determine if soil meets permeability requirements for dam cores and filters.