Makes the currents faster. Some rapids get easier, others become more difficult. Low Water Flows below an expected average. More rocks and obstacles may show, rapids become more technical. Eddie Water flowing upstream behind a rock or other obstacle.
Eddies often provide a safe place to get out of the current.
Where the water flowing upstream passes the water flowing downstream. Water flowing through a shallower, constricted, or steeper section forms a rapid. Where water flowing over a rock or other obstacle flows down, then back onto itself in an eruption of whitewater. Laterals A wave or hole peeling off an obstacle at an angle. Haystack A wave in a river formed by obstacles on the river bottom, where the wave stands still relative to the bank.