Which of the following equation expresses the Darcy's law? Assume that: Q is the groundwater velocity, K is the permeability, A is the area of cross section, h is the difference in hydraulic head, and x is the travel distance of groundwater.

a. Q = K / (x A h)
b. Q = K A h / x
c. Q = K A x / h
d. Q = A h / (K x)


Ans: b. Q = K A h / x

Environmental & Atmospheric Sciences

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