[Scubabear68]

Water is much trickier than many people realize. I live on the Delaware River, near where Washington made his famous crossing. The river here is very shallow and looks deceptively peaceful.

Yet people die on this stretch every year, even experienced kayakers who let their guard down. What generally happens is someone falls out of their kayak / tube / whatever, and their feet get caught in a snag in the bottom. The river current is enough to force them under water.

Most places around here will no longer rent water equipment if the river is running high and fast, yet some foolish people manage to go out and die.

But not sure what the answer is for people falling in from the banks or bridges. Comprehensive fencing is expensive and ugly.