transmissibility (ground water)

The capacity of a rock to transmit water under pressure. The coefficient of transmissibility is the rate of flow of water, at the prevailing water temperature, in gallons per day, through a vertical strip of the aquifer one foot wide, extending the full saturated height of the aquifer under a hydraulic gradient of 100 percent. A Hydraulic Gradient of 100 percent means a one foot drop in head in one foot of flow distance.