The present invention relates to an apparatus, {HEAD ~ system}, and method for modifying {TAIL ~ the flow} of water in a channel 
for modifying
The present invention relates to an apparatus , { HEAD ~ system } , and method for modifying { TAIL ~ the flow } of water in a channel
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH