coefficient of runoff

coefficient of runoff

In the design of storm-water drainage systems, a coefficient which accounts for storm-water losses attributed to evaporation, infiltration, and surface depressions.
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Regardless of changes in CN, and the coefficient of runoff, development of water erosion, especially surface erosion, rill erosion, gully erosion and piping erosion were visible in the visit of the area, which can attribute their recent development to their increase amount of surface runoff and discharge, although this may be arise from climate changes, natural factors and other factors.
1], reducing permeability and maintenance of soil surface and consequently increase in the coefficient of runoff and afterwards increase in surface runoff.

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