Sancho1702, your question is too broad.
Some rivers are so wide and so slow that it's like diving in a lake. Other rivers have dangerous whitewater rapids.
Here in West Virginia, there is a danger of getting stuffed under boulders because of the poor visibility and the strong whitewater current. It's always extremely dangerous if the current is pushing you faster than you can react to obstacles because of the poor visibility.
Never underestimate the power of current. You can get snagged on something or stuffed into a hole and the current can make it impossible to rescue yourself. Your buddies won't be able to help either, they'll be far downstream before they realize you're no longer there, and you can't fight the current.
Trees wedged into holes make for very dangerous strainers.
Man-made structures and debris are always very dangerous.
Streamline. Make sure you've got nothing dangling that can snag on something.
Some rivers are so wide and so slow that it's like diving in a lake. Other rivers have dangerous whitewater rapids.
Here in West Virginia, there is a danger of getting stuffed under boulders because of the poor visibility and the strong whitewater current. It's always extremely dangerous if the current is pushing you faster than you can react to obstacles because of the poor visibility.
Never underestimate the power of current. You can get snagged on something or stuffed into a hole and the current can make it impossible to rescue yourself. Your buddies won't be able to help either, they'll be far downstream before they realize you're no longer there, and you can't fight the current.
Trees wedged into holes make for very dangerous strainers.
Man-made structures and debris are always very dangerous.
Streamline. Make sure you've got nothing dangling that can snag on something.