This curve depicts the general rate of sediment delivery
by streams according to their drainage basins' mean annual
precipitation. For low precipitation there is little water to move
sediment; for high precipitation vegetation holds sediment in place.
The maximum of sediment production occurs in semi-arid basins.
Adapted from Figure 3-7 of Leopold, L.B., Wolman, M.G., and Miller, J.P., 1964,
Fluvial processes in geomorphology, 522 p., Freeman, San Francisco.
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