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