The coefficient of transmissibility is the flow through:

A unit area of aquifer under unit head

A well of unit radius under unit drawdown

A horizontal layer of unit thickness under unit pressure

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Coefficient of transmissibility

Short answer

Coefficient of transmissibility T is the discharge through a vertical strip of aquifer of unit width and full saturated thickness under a unit hydraulic gradient, equal to k times the aquifer thickness b, with units m2/s or m2/day.

Define coefficient of transmissibility.

Coefficient of transmissibility $T$ is the rate of flow of water through a vertical strip of aquifer of unit width and full saturated thickness $b$ under a unit hydraulic gradient. It equals the coefficient of permeability times the aquifer thickness:

T = k\,b

Its unit is m²/day or m²/s.

✓ Answer checked by Claude Opus 5.5 (high effort)

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