Runoff curve number variation with drainage area, Walnut Gulch, Arizona
1996
Simanton, J.R. | Hawkins, R.H. | Mohseni-Saravi, M. | Renard, K.G.
Runoff Curve Numbers (a measure of a watershed's runoff response to a rainstorm) were determined using three different methods for 18 semiarid watersheds in southeastern Arizona. Each of the methods produced similar results. A relationship was then developed between optimum Curve Number and drainage area of the watershed used. Curve Numbers decreased with increasing drainage area. This response is a reflection of spatial variability in rainfall and infiltration losses in the coarse-textured material of the channels associated with larger drainage basins.
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