Abstract
ABSTRACT THE head losses were measured in a subirrigation system on a sandy loam soil in southern Quebec during the Summer of 1985. The measurements included entrance head loss from a control chamber, friction head loss in drain pipes, exit head loss from perforations in the pipe and divergence head loss in the soil around drain pipes. The head losses were found to be a function of the flowrate in the subirrigation system. For the experimental setup, total head losses were found to be about 55 cm for an average water inflow of 30 L/min in the control chamber. It was found that the exit head loss from perforations in pipes is the most significant head loss in the subirrigation system. It was 75% of the total head loss in the subirrigation system.
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