RedactedNarrative: The two occupants of vessel #1 launched a canoe from Kelley Nature Preserve at approximately 3:00 pm. Their friend launched a kayak at the same location with them.  The Little Miami River had a strong current that day.  The median flow of the river is 818 cfs, but that day it was 2700 cfs.  Shortly after leaving the launch site, the paddlers encountered rapids.  In the rapids, vessel #1 struck a submerged object on the port side, causing it to tip in that direction, downstream.  Neither occupant was wearing a life jacket at the time of the incident.  Victim #1 submerged in the river and struck his head, neck, back, and knees on rocks in the riverbed.  Both occupants were able to make it safely to an island that is located across the river from the Little Miami Boat Club.  The uninjured occupant decided to leave the island and make it across to the shoreline opposite from the boat club and then went in search of the kayaker who was no longer with their party.  Victim #1 remained on the island because he felt that he could not make it across the river.  The victim believed that he sat on the island for a couple hours before he began yelling for help.  Someone at Kelley Island Nature Preserve heard the cries for help and called 911.  Miami Township arrived on scene, launched a boat and retrieved the victim at approximately 8:00 pm.  On shore, the victim was taken to a medic for examination.  The uninjured occupant arrived at the medic while the victim was being evaluated.  At that time, the kayak operator was missing.  While gathering information about the incident and the operator of the kayak, the missing kayak operator arrived on scene as well, uninjured.  The victim was transported to the hospital for further examination - treated and released.