Abstract
About 85% of the total water resources are utilized in agriculture. Agriculture is more dependent upon groundwater resources. It is important to know the accurate discharge of the tubewell so that required amount of water may be applied to the field. Presently, Co-ordinate method is the most common method used to measure tubewell discharge, but this is not very accurate. Therefore, to overcome the limitations, an orifice bucket was fabricated and calibrated. It was found that orifices of diameter 11.3, 10, 7.5 and 5 cm measured discharges ranging from 15 -20, 10 -15, 5 -10 and 1 - 5 lps, respectively. Key words: Tube well discharge, water measurement, orifice bucket
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