Hydraulic Conductivity

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

darcys law 3Hydraulic conductivity, abbreviated as k, is the ease with which a fluid can move through porous spaces or fractures.  Smaller the particles, means smaller the pores (area available for flow), more friction resistance, has lower hydraulic conductivity.  The larger the particles, means larger the pores, less friction resistance, has higher hydraulic conductivity.

 

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hydraulic conductivity formula

\(\large{ k = \frac{ Q }{ i \; A_c }   }\) 

\(\large{ k = \frac{ v }{ i }   }\)

Symbol English Metric
\(\large{ k }\) = hydraulic conductivity \(\large{\frac{ft}{day}}\) \(\large{\frac{m}{day}}\)
\(\large{ A_c }\) = area cross-section \(\large{ft^2}\) \(\large{m^2}\)
\(\large{ v }\) = Darcy velocity or flux \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\)
\(\large{ Q }\) = flow rate \(\large{\frac{ft^3}{sec}}\) \(\large{\frac{m^3}{s}}\)
 \(\large{ i }\) = hydraulic gradient \(\large{dimensionless}\)   

 

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Tags: Hydraulic Equations Soil Equations Conductivity Equations