1. What is Magnetic Permeability of Soil?

The magnetic permeability of soil (μ) describes how easily a magnetic field can penetrate through soil. It depends on the vacuum permeability (μ₀) and the soil's magnetic susceptibility (χ_soil).

2. How Does the Calculator Work?

The calculator uses the magnetic permeability equation:

Where:

• \( \mu \) — Soil permeability (H/m)
• \( \mu_0 \) — Vacuum permeability (1.25663706212 × 10⁻⁶ H/m)
• \( \chi_{\text{soil}} \) — Soil magnetic susceptibility (dimensionless)

Explanation: The equation shows that soil permeability increases with higher magnetic susceptibility of the soil components.

3. Importance of Soil Permeability

Details: Soil permeability is crucial for geophysical surveys, archaeological investigations, and understanding soil's interaction with electromagnetic fields.

4. Using the Calculator

Tips: Enter vacuum permeability (typically 1.25663706212 × 10⁻⁶ H/m) and soil susceptibility value. The calculator will compute the effective permeability of the soil.

5. Frequently Asked Questions (FAQ)

Q1: What is typical χ_soil value for common soils?
A: Most soils have χ_soil between 0.00001 to 0.01, with higher values for iron-rich soils.

Q2: Why is μ₀ constant important?
A: μ₀ is the fundamental magnetic constant that defines permeability in vacuum, serving as the baseline for all materials.

Q3: How does soil moisture affect permeability?
A: Water typically reduces soil's magnetic susceptibility, especially if it leaches iron compounds.

Q4: What soils have highest permeability?
A: Ferromagnetic mineral-rich soils (containing magnetite, maghemite) show highest permeability.

Q5: How is this used in practical applications?
A: Important for ground-penetrating radar interpretation, EMI surveys, and archaeological prospection.