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Hydrology-and-irrigation-->View question

Asked On2017-06-30 07:43:29 by:manjarimattur

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Depth of water required on the field during transplantation = 500mm 
Useful rainfall during this period= 120mm 
Depth of water required to be supplied by the water course= 500-120= 380mm= 0.38m 
Duty = ∆= 8.64B/D 
Duty of water on the field is = Duty = ∆= 8.64 × 0.15/0.38 = 341 hectares/ cumec
Since the losses of water in the water course are 20%, a discharge of 1 cumec at the head of the water course will be reduced to 0.8cumec at the head of the field and hence will irrigate. 
= 381x 0.8= 272.8 hectares.
Duty of water at the head of the water course = 272.8 hectares. 
Discharge at the head of water course = 700 / 272=2.57 cumecs

Answerd on:2017-06-30 Answerd By:Aparna-Dasgupta

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