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