1. What is Transmissivity?

Transmissivity is the rate at which groundwater flows horizontally through an aquifer or the degree to which a medium allows something, in particular electromagnetic radiation, to pass through it. It is a key parameter in hydrogeology for understanding groundwater movement.

2. How Does the Calculator Work?

The calculator uses the transmissivity formula:

Where:

• \( T \) — Transmissivity (m²/s)
• \( r_o \) — Distance from pumping well to point intersection (m)
• \( S \) — Storage coefficient
• \( t \) — Time (hours)

Explanation: This formula calculates the transmissivity of an aquifer based on the distance from the pumping well, storage coefficient, and time.

3. Importance of Transmissivity Calculation

Details: Accurate transmissivity estimation is crucial for designing well fields, managing groundwater resources, and predicting contaminant transport in aquifers.

4. Using the Calculator

Tips: Enter distance in meters, storage coefficient (dimensionless), and time in hours. All values must be valid 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 tight formations to over 1000 m²/day for highly productive aquifers.

Q2: How does storage coefficient affect transmissivity?
A: The storage coefficient represents the aquifer's ability to store water, and together with transmissivity, it helps characterize aquifer properties.

Q3: When is this formula typically used?
A: This formula is commonly used in well-field design and aquifer testing to determine hydraulic properties of groundwater systems.

Q4: Are there limitations to this equation?
A: This equation assumes ideal conditions and homogeneous aquifers. Real-world applications may require adjustments for aquifer heterogeneity.

Q5: What units should be used for input values?
A: Distance should be in meters, time in hours, and the storage coefficient is dimensionless. The result will be in m²/s.