34.6.2. Transmissivity (T)

Try these first

1. 1.

   What does transmissivity measure?

   Hint

   Think about the flow of water in relation to aquifers.

2. 2.

   What is the formula for transmissivity?

   Hint

   What two terms do you need to calculate transmissivity?

3. 3.

   What does transmissivity measure in an aquifer?

   • A. The amount of water stored
   • B. The rate of water flow through saturated thickness
   • C. The depth of the aquifer

   Hint

   Focus on flow rather than storage or depth.

4. 4.

   True or False: Transmissivity is expressed as a product of hydraulic conductivity and saturated thickness.

   • True
   • False

   Hint

   Recall the formula we discussed.

5. 5.

   If an unconfined aquifer has K of 20 m/day, and hydraulic tests show a transmissivity of 200 m²/day, what is the saturated thickness of the aquifer?

   Hint

   Rearrange the formula before calculating.

6. 6.

   A well is drilled into a confined aquifer with a total thickness of 30 m. During pumping, it’s determined that the transmissivity is 600 m²/day. What is the hydraulic conductivity?

   Hint

   Identify and isolate K from the equation.