International Scale of River Difficulty

The International Scale of River Difficulty is a standardized scale used to rate the safety of a stretch of river, or a single (sometimes whitewater) rapid. The grade reflects the technical difficulty and skill level required associated with the section of river. The scale is of use to various water sports and activities, such as rafting, riverboarding, whitewater canoeing, and whitewater kayaking.

Read more about International Scale Of River Difficulty:  Classification, Caution in Application

Famous quotes containing the words scale, river and/or difficulty:

    The most perfect political community must be amongst those who are in the middle rank, and those states are best instituted wherein these are a larger and more respectable part, if possible, than both the other; or, if that cannot be, at least than either of them separate, so that being thrown into the balance it may prevent either scale from preponderating.
    Aristotle (384–322 B.C.)

    But not luck
    brought us here. By design
    clear air and cold wind polish
    the river lights, by design
    we are to live now in a new place.
    Denise Levertov (b. 1923)

    A parent who from his own childhood experience is convinced of the value of fairy tales will have no difficulty in answering his child’s questions; but an adult who thinks these tales are only a bunch of lies had better not try telling them; he won’t be able to related them in a way which would enrich the child’s life.
    Bruno Bettelheim (20th century)