{TAIL ~ An apparatus} and system for modifying the flow of water in {HEAD ~ a channel} are also disclosed 
{ TAIL ~ An apparatus } and system for modifying the flow of water in { HEAD ~ a channel } are also disclosed
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH