Abstract
The groundwater mound which develops below an irrigation ditch or leaky canal was investigated experimentally using a hydraulic sand-tank model and a Hele-Shaw analogue. The results showed that the mound built up in height at a rate proportional to the cuberoot of time and moved laterally at a rate proportional to the cube root of the time squared, as predicted from a solution of the Boussinesq equation, obtained numerically after using Barenblatt's transformation.
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