Groundwater Transmissivity Calculator |
Compute aquifer transmissivity from hydraulic conductivity and aquifer thickness |
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Units in groundwater transmissivity calculator: cm=centimeter, ft=foot, gpd=U.S. gallon/day, gph=U.S. gallon/hr, gpm=U.S. gallon/min, gal=gallon (U.S.), hr=hour, km=kilometer, m=meter, min=minute, s=second.
Unconfined Aquifer: T = K h Confined Aquifer: T = K b
Aquifer transmissivity is a useful parameter in groundwater flow modeling.
Transmissivity includes the aquifer hydraulic conductivity which is a property of the aquifer.
Hydraulic conductivity is a function of the fluid moving through the porous medium (i.e. aquifer, formation)
and the permeability of the formation. Many experiments over many years
have been conducted of water flowing through various porous media.
Hydraulic conductivities determined from many experiments have been tabulated.
The table below is typical. In viewing the table, it is apparent that hydraulic
conductivity values cover a wide range even for a given formation. If field or
laboratory test results of hydraulic conductivity are not available for your
particular formation, then use of published values like the ones below are helpful guides.
The values in the drop-down menu in our transmissivity calculator are typical numbers within the ranges given below for clayey, silty, sandy, and gravelly soil.
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