Coefficient of Aquifer Permeability given Maximum Height of Water Table Calculator

Formula Used:

\[ K = \frac{R \times L^2}{(2 \times h_m)^2} \]

Natural Recharge (R):

m³/s

Length between Tile Drain (L):

Maximum Height of Water Table (h_m):

Coefficient of Permeability (K):

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1. What is the Coefficient of Permeability?

The Coefficient of Permeability of soil describes how easily a liquid will move through the soil. It is a crucial parameter in hydrogeology and civil engineering for understanding groundwater flow and drainage systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ K = \frac{R \times L^2}{(2 \times h_m)^2} \]

Where:

\( K \) — Coefficient of Permeability (m/s)
\( R \) — Natural Recharge (m³/s)
\( L \) — Length between Tile Drain (m)
\( h_m \) — Maximum Height of Water Table (m)

Explanation: This formula calculates the permeability coefficient based on natural recharge, drain spacing, and maximum water table height in drainage systems.

3. Importance of Permeability Calculation

Details: Accurate permeability calculation is essential for designing effective drainage systems, predicting groundwater movement, and assessing soil suitability for various engineering projects.

4. Using the Calculator

Tips: Enter natural recharge in m³/s, length between tile drains in meters, and maximum water table height in meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is natural recharge in hydrogeology?
A: Natural recharge is the process by which groundwater is replenished naturally when precipitation infiltrates the ground, moving through the soil and rock layers until it reaches the water table.

Q2: What does length between tile drain represent?
A: The length between tile drain refers to the approximate expression to the water table profile on a horizontal impervious boundary in drainage systems.

Q3: What is the maximum height of water table?
A: The maximum height of water table refers to the highest level at which the water table can be found in a given area, typically measured from an impervious layer.

Q4: What are typical permeability values for different soils?
A: Permeability varies widely: gravel (10⁻¹-10⁻² m/s), sand (10⁻³-10⁻⁵ m/s), silt (10⁻⁶-10⁻⁸ m/s), clay (10⁻⁹-10⁻¹² m/s).

Q5: When is this formula particularly useful?
A: This formula is particularly useful in agricultural drainage design, foundation engineering, and groundwater management projects where tile drains are employed.