Before revision: alt=Whitewater at Yosemite|Whitewater at Yosemite Whitewater forms in a rapid context , in particular, when a river's gradient changes enough to generate so much turbulence that air is trapped within the water.
After revision: alt=Whitewater at Yosemite|Whitewater at Yosemite Whitewater forms in the context of rapids , in particular, when a river's gradient changes enough to generate so much turbulence that air is trapped within the water.