This term is generally applied to reversals of less than river wide width. See Souse Hole. This is a general term for reversals, eddy fences, and otherplaces where there is a hydraulic gap, a powerful current differential. Sometimes used in the plural to refer to the whole phenomenon of big water, whom massive waves,violent currents, and large holes are the obstacles, rather than rocks. Symptoms include lack of coordination, thickness of speech, irrationality, blueness of skin, dilation of pupils, decrease in heart andrespiratory rate, extreme weakness,and uncontrolled shivering.
Victims often become unconscious and sometimes die.
A reversal capable of trapping araft for long periods. Similar to butmore powerful than a stopper. The exposed edge of a rock stratum that acts as a low natural dam or as a series of such dams. Left side of the river when facing downstream. The use of ropes to work a boatdown through a rapid from shore.