26) Specific discharge of 1 cm per day is
observed in a porous medium where hydraulic head difference is 0.5 m and the
flow length is 20 m. calculate the hydraulic conductivity(in m/day).
(Thanks
to Chandrasekhar, ANU)
Solution:
The specific discharge
can be defined as
\frac{Q}{A}=K
\frac{dh}{dl}------------------(1)
Where
\frac{Q}{A} is the specific discharge = 1 cm per day
=
0.01 m per day
dh
is the hydraulic head difference = 0.5 m
dl
is the flow length = 20 m
K
is the hydraulic conductivity =?
Therefore
by substituting all the given values in the equation (1)
\frac{Q}{A}=K
\frac{dh}{dl}
0.01=K
\frac{0.5}{20}
K
=\frac{0.01 \times 20}{0.5}
K
= 0.4 meter per day
hii sir ,in this problem given 20 m ,but you are take 20 cm , i think typing mistake pl correct it sir.
ReplyDeleteThank you. Corrected.
Delete