Abstract
ABSTRACT ASHUNT line metering system with segmental orifice provides a low cost means of cumulatively measuring the volume of water discharged from irrigation wells. The flow through the shunt line, which is measured by a small household type water meter, is related to the flow through the main irrigation pipe by a flow coefficient which was experimentally determined for a 15.41 cm (6 in.) pipe. This flow coefficient is a function of the degree of orifice contraction. Field installation is relatively easy and field calibration is unnecessary. The cost of the metering system can be less than $100 and the accuracy is within 5 percent.
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