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