Generalized peak skew coefficients for Oklahoma, 1961-1990 base period.

This digital-map data set consists of a grid of generalized skew
coefficients of logarithms of annual maximum streamflow for
Oklahoma streams less than or equal to 2,510 square miles in
drainage area. This grid of skew coefficients is taken from figure
11 of the Tortorelli and Bergman, 1985 report, "Techniques for
estimating flood peak discharges for unregulated streams and
streams regulated by small floodwater retarding structures in
Oklahoma," U.S. Geological Survey Water-Resources Investigations
Report 84-4358. The skew coefficients were used to develop
peak-flow regression equations in the Tortorelli, 1997 report,
"Techniques for estimating peak-streamflow frequency for
unregulated streams and streams regulated by small floodwater
retarding structures in Oklahoma," U.S. Geological Survey
Water-Resources Investigations Report 97-4202. Only skew
coefficient values within Oklahoma are intended for use with the
regression equations. To save disk space, the skew coefficient
values have been multiplied by 100 and rounded to integers with two
significant digits.