Question

What is the average linear (seepage) velocity of water in an aquifer with a hydraulic conductivity of 6.9 x 10-4 m/s and porosity of 30% if the hydraulic gradient is 0.0014? a. 0.28 m/d b. 3.2 m/d c. 0.08 m/d d. 0.003 m/d

Answer 1

a. 0.28

Explanation:

Given that

porosity =30%

hydraulic gradient = 0.0014

hydraulic conductivity = 6.9 x 10⁻4 m/s

We know that average linear velocity given as

`v=(K)/(n_e)(dh)/(dl)`

`v=(6.9* 10^(-4))/(0.3)*0.0014\ m/s`

`v=3.22* 10^(-6)\ m/s`

The velocity in m/d ( 1 m/s =86400 m/d)

v= 0.27 m/d

So the nearest answer is 'a'.

a. 0.28