Darcy's Law is an equation that describes the flow of a fluid through a porous medium. It forms the basis of hydrogeology and describes how groundwater flows through an aquifer.
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Pro Tips
Hydraulic conductivity (K) depends on both the porous medium and the fluid.
Specific discharge (q) is also known as the Darcy velocity or Darcy flux.
The law is valid for laminar flow (low Reynolds numbers).
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Fun Facts
"The law was established by Henry Darcy based on experiments on water flow through beds of sand."
"While it's called 'velocity', specific discharge is actually a volume flux per unit area; the actual movement speed of the fluid is higher because it only flows through the pores."
