Question
Download Solution PDFMinimum Angle between axis of weir and canal head regulator is _______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Main Canal Head Regulator:
(i) It is a masonry or concrete structure, constructed at the head of the canal taking off from the river.
(ii) It is constructed upstream of the under sluices and located in one bank.
(iii) Its alignment is kept at an angle varying from 90° to 120° with the axis of the weir. (So, the Minimum Angle between the axis of weir and canal head regulator is 90°)
(iv) The head regulator consists of a number of spans separated by piers and each span is fitted with a steel gate which can be moved up or down.
(v) In the grooves made in the piers, with the help of either manual labour or winches.
(vi) In old regulators, the spans use to be quite small, but the modern trend is to use larger spans of 8 to 18 m.
Following are the functions of a main canal head regulator.
(i) To open or close the discharge in the canal and when require.
(ii) To check the silt entrance into the canal.
(iii) To prevent river floods from entering the canal.
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