Dupuit’s assumption

Dupuit’s assumption
   A simplifying assumption for the solution of a free surface well flow problem [16] (e.g. a water-table aquifer.) It is based on the assumption that the slope of the phreatic surface is negligibly small so that the equipotential lines are vertical and flow is essentially horizontal.

A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. . 2002.

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