obstacles on the kayaking route
If you capsize in a mountain kayak, the only thing you can do is an Eskimo roll, i.e. you roll with the kayak or cabin, i.e. you unfasten the spray deck and leave the cockpit. Both these things look easy only on TV. In the case of wide tourist kayaks with large cockpits in which you generally don’t use spray decks, it is much simpler. You fall into the water gracefully and often don’t even plunge your head.
Every river is a surface flow that runs in a natural channel. From the point of view of kayak tourism, the more natural the river is, the better, as it is more interesting. Kayaking on the controlled channels may be easier, but it is certainly more boring. It is good if “there is much stuff going on” during a kayak rally: the shallows, a bend, a fallen tree. How to avoid obstacles?