Seepage Velocity

Seepage velocity, abbreviated as \(v_s\), represent the actual velocity of a fluid flowing through the void spaces in the soil.

 

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• Darcy's Law

 

Seepage Velocity formulas

\(\large{ v_s = \frac{ v \; A_c}{ A_v}   }\)
\(\large{ v_s = \frac{ v}{ n}  }\)

Where:

Units	English	Metric
\(\large{ v_s }\) = seepage velocity	\(\large{\frac{ft}{sec}}\)	\(\large{\frac{m}{s}}\)
\(\large{ A_c }\) = area cross-section of flow	\(\large{ft^2}\)	\(\large{m^2}\)
\(\large{ A_v }\) = area cross-section of voids	\(\large{ft^2}\)	\(\large{m^2}\)
\(\large{ v }\) = darcy velocity or flux	\(\large{\frac{ft}{sec}}\)	\(\large{\frac{m}{s}}\)
\(\large{ n }\) = porosity	\(\large{ dimensionless }\)

Solve For:

\(\large{ v = \frac{ v_s \; A_v }{ A_c }   }\)
\(\large{ A_c = \frac{ v_s \; A_v }{ v }   }\)
\(\large{ A_v = \frac{ v \; A_c }{ v_s }   }\)
\(\large{ v = v_s \; n   }\)
\(\large{ n = \frac{ v }{ v_s }   }\)