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A siphon aqueduct is constructed at a canal crossing site where drainage HFL was 212.2 m by allowing an afflux of 0.4 m at high flood discharge. At this site, the water level downstream of the crossing at the same high flood will be _________

A siphon aqueduct is constructed at a canal crossing site where drainage HFL was 212.2 m by allowing an afflux of 0.4 m at high flood discharge. At this site, the water level downstream of the crossing at the same high flood will be _________ Correct Answer 212.2 m

The D/s HFL of the drain remains the same by the construction of works and the U/s HFL can be obtained by adding afflux to the D/s HFL. The D/s water level = 212.2 m The U/s water level = 212.2 + 0.4 = 212.6 m.

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