Report Title: Floods in Oklahoma, magnitude and frequency
Report Number: OFR 64-170
Authors: A.O. Westfall and J.L. Patterson
Abstract
This report presents methods by which the magnitude and frequency of
expected floods for most streams in Oklahoma can be determined. Flood
data were used to define flood-frequency curves applicable to the
State. Composite frequency curves were drawn showing the relation of
mean annual floods to floods having recurrence intervals from 1.2 to
50 years. In some areas, it was found that the slope of the composite
frequency curve varies with the drainage area. An adjustment curve was
defined for use in conjunction with the composite curve for these
areas. Other curves express the relation of the mean annual flood to
drainage basin characteristics. By combining data from the composite
and mean annual flood curves, flood-frequency curves can be drawn for
streams in Oklahoma not materially affected by the works of man.
Neither of the above two types of curves should be extrapolated beyond
the range defined by base data. Frequency curves presented in this
report were based on analysis of flood records collected at gaging
stations having 5 or more years of record not materially affected by
regulation or diversion.
(available as photostat copy only)
http://ok.water.usgs.gov/abstracts/ofr64-170.html
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Last modified: Mon May 24 08:17:58 1999