A ______ is an irrigation structure constructed across a canal to lower down its water level and destroy the surplus energy liberated from the falling water which may otherwise scour the bed and banks of the canal

A ______ is an irrigation structure constructed across a canal to lowe

1.	A ______ is an irrigation structure constructed across a canal to lower down its water level and destroy the surplus energy liberated from the falling water which may otherwise scour the bed and banks of the canal
A.	Canal falls
B.	Head regulator
C.	Canal escape
D.	Canal outlets
Answer» B. Head regulator