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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.
The calculator uses the formula:
Where:
Explanation: This formula calculates transmissivity based on storage coefficient, distance from pumping well to point intersection, and total drawdown measurements.
Details: Transmissivity is a crucial parameter in hydrogeology for assessing aquifer properties, predicting groundwater flow, and designing effective water extraction systems.
Tips: Enter the storage coefficient, distance from pumping well to point intersection in meters, and total drawdown in meters. All values must be positive numbers.
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 permeable aquifers.
Q2: How does storage coefficient affect transmissivity?
A: The storage coefficient represents the aquifer's ability to store water, and higher values generally indicate greater water storage capacity, which influences transmissivity calculations.
Q3: What factors can affect the accuracy of this calculation?
A: Measurement accuracy of drawdown, proper identification of the point intersection, and aquifer homogeneity can all affect calculation accuracy.
Q4: When is this formula most applicable?
A: This formula is particularly useful for confined aquifers and pumping test analysis where the Theis solution applies.
Q5: Can this calculator be used for unconfined aquifers?
A: While the basic principles apply, unconfined aquifers may require additional considerations due to water table fluctuations and specific yield characteristics.