Civil Engineering MCQAE Level Civil Engineering
Darcy's law for groundwater flow states that the discharge velocity (Darcy flux) v through a porous medium is:
HydrologyDarcy Law GroundwaterMEDIUM
Choose the correct answer
A
v = k + i
B
v = k * i (where k = hydraulic conductivity, i = hydraulic gradient)
C
v = k * i^2
D
v = i / k
Correct Answer
B. v = k * i (where k = hydraulic conductivity, i = hydraulic gradient)
Why is this the answer?
Darcy's law is expressed as v = ki, where v is the discharge velocity (Darcy flux), k is the hydraulic conductivity, and i is the hydraulic gradient. Seepage velocity (actual pore velocity) is v_s = v/n, where n is the effective porosity. The original text incorrectly equated Darcy flux with seepage velocity.
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