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Functions of head regulator, cross regulator, escape

Short answer

Head regulator controls discharge into an off-taking canal, excludes silt, and shuts off supply. Cross regulator raises water level in parent canal to feed off-takes and regulates downstream flow. Escape releases surplus water into a drain to prevent overtopping, enables canal emptying and silt flushing.

Describe the function of head regulator, cross regulator and escape.

Head regulator: a gated structure at the head of an off-taking canal or distributary. It regulates the discharge entering the off-take, controls the entry of silt, measures the discharge, and shuts off the supply during floods or repairs.

Cross regulator: a gated structure built across the parent canal just downstream of an off-take. It raises (heads up) the water level in the parent canal so that the off-taking channel gets its full share even when the supply is low, regulates the discharge passing to the downstream reach, and allows the canal to be closed for repair.

Escape: a structure that discharges surplus canal water into a natural drain. It protects the canal from overtopping and breaches caused by excess rainwater or faulty operation, empties the canal in an emergency or for repairs, and (as a scouring escape) flushes out silt.

✓ Answer checked by Claude Opus 5.5 (high effort)

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