Flow measurement forms the backbons of water management. From time to time, devices are evalved for flow measurement and irrigation module is one such expedient. It is claimed of a particular irrigation module that it can maintain a constant discharge irrespective of the depth of flow. To test verify this claim, experiments were carried on two such modules - 3 lit/sec and 6 lit/sec capacities. It has been decisively arrived that the modules do not pass a constant discharge. Instead, the discharges passed through, seem to vary more or less in a linear way causing percentage deviations even to the extent of 108 %.
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