Question

Length of soil sample for constant head permeability test is 30 cm, Area of specimen is 177cm)
constant head difference is so cm, total volume of water collected in 5 min is 350cm
Calculate the hydraulic conductivity of the soil.
A) 285 10 cm/sed
D) 1.09x10 cm/sec
B) 1.0910 cm/sec
C) 3,95x10 cm/sec​

Answer 1

Explanation:

c is really really right answer

Answer 2

Given:-

Length of Sample= 30 cm²

Area of Sample=177 cm

Head difference=50cm

Volume of water collected in 5min=350 cm

Find: We have to calculate the hydraulic conductivity of the soil

Step by Step Solution:

We know that By Darcy's law

Q=kiA  ....(i)

i- is the hydraulic gradient= $\frac{hl}{l}$

k -is the Hydraulic Conductivity

Therefor, Q=$\fracd\frac{350}{5\times60}$ =1.17 cm³/sec

and

i=$\frac{50}{30}$=1.667

Putting the values in the equation (i) we get

∴1.17=k x 1.667 x 177

k=3.95x$10^{-3}$ $cm^{3}$/sec

Therefore the correct answer is C) 3,95x10 cm/sec