1. What is Transmissivity?

Transmissivity refers to the measure of how much water can be transmitted horizontally through an aquifer. It is the product of the hydraulic conductivity of the aquifer and its saturated thickness.

2. How Does the Calculator Work?

The calculator uses the transmissivity formula:

Where:

• \( \tau \) — Transmissivity (m²/s)
• \( K \) — Coefficient of Permeability at 20° C (m/s)
• \( b \) — Aquifer Thickness (m)

Explanation: The equation calculates the transmissivity by multiplying the coefficient of permeability by the aquifer thickness.

3. Importance of Transmissivity Calculation

Details: Transmissivity is a crucial parameter in hydrogeology for assessing the ability of an aquifer to transmit groundwater. It helps in designing well fields, predicting groundwater flow, and managing water resources.

4. Using the Calculator

Tips: Enter the coefficient of permeability in m/s and aquifer thickness in meters. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical range of transmissivity values?
A: Transmissivity values can range from less than 1 m²/day for low-permeability aquifers to over 1000 m²/day for highly productive aquifers.

Q2: How does temperature affect permeability?
A: The coefficient of permeability is typically standardized at 20°C to account for temperature-dependent viscosity effects on water flow.

Q3: What factors influence aquifer thickness?
A: Aquifer thickness depends on geological formations, can vary spatially, and may change due to seasonal water level fluctuations.

Q4: Are there limitations to this calculation?
A: This simple formula assumes homogeneous and isotropic aquifer conditions. Real-world aquifers often have complex heterogeneities.

Q5: How is transmissivity measured in the field?
A: Field methods include pumping tests, slug tests, and tracer tests that provide more comprehensive aquifer characterization.