What is formula used to determine the crest level while designing a sarda type fall?

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Canal Falls topics include: Canal falls type and location, syphon well drop design, canal falls design for vertical drop fall, baffer or inglis fall.   A canal fall, also known as a weir or barrage, is a structure built within a water channel to control water levels and prevent erosion. Canal falls are used when the ground surface is not uniform throughout the canal's alignment. They are built to maintain a certain drop in the canal level and to carry water from higher to lower levels.  Canal falls can be built for different purposes, such as: Divert water for agricultural needs Generate... Show more

What is formula used to determine the crest level while designing a sarda type fall?