1975
DOI: 10.3133/ofr74336
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Magnitude and frequency of floods in Washington

Abstract: Relations are provided to estimate the magnitude and frequency of floods on Washington streams. Annual-peak-flow data from stream gaging stations on unregulated streams having 10 years or more of record were used to determine a log-Pearson Type III frequency curve for each station. Flood magnitudes having recurrence intervals of 2, 5, 10, 25, 50, and 100 years were then related to physical and climatic indices of the drainage basins by multiple-regression analysis using the Biomedical Computer Program BMDO2R. … Show more

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Cited by 4 publications
(4 citation statements)
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“…No long-term streamflow data are available; however, U.S. Geological Survey data from Finney Creek between 1943 and 1948 show a range of daily flows from 15.9 cubic feet per second (cfs) (0.45 m 3 /s) to 2,931 cfs (83 m 3 /s) (http://waterdata.usgs.gov/nwis/ nwisman/?site_no=12194500&agancy_cd=USGS, accessed April 2008). Cummans et al (1975) estimated a bankfull discharge at the mouth of Finney Creek of 5,085 cfs (144 m 3 /s).…”
Section: Description Of the Project Areamentioning
confidence: 99%
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“…No long-term streamflow data are available; however, U.S. Geological Survey data from Finney Creek between 1943 and 1948 show a range of daily flows from 15.9 cubic feet per second (cfs) (0.45 m 3 /s) to 2,931 cfs (83 m 3 /s) (http://waterdata.usgs.gov/nwis/ nwisman/?site_no=12194500&agancy_cd=USGS, accessed April 2008). Cummans et al (1975) estimated a bankfull discharge at the mouth of Finney Creek of 5,085 cfs (144 m 3 /s).…”
Section: Description Of the Project Areamentioning
confidence: 99%
“…Cummans et al . () estimated a bankfull discharge at the mouth of Finney Creek of 5,085 cfs (144 m 3 /s).…”
Section: Introductionmentioning
confidence: 97%
“…The predicted peak discharges of a 25-year recurrence interval flood in the three dominant Cascade flood regions are markedly different (Figure 6.8). Discharges calculated from the regression formulae of Cummans et al (1975) (standardized to units of discharge per unit watershed area with standard errors of 32, 39, and 50% in Regions I, II, and III, respectively) show that Region I produces the highest discharge, Region III the lowest, and Region II an intermediate amount. In addition, smaller drainage areas produce more runoff per unit area than larger ones, regardless of region.…”
Section: Timing and Quantity Of Flowmentioning
confidence: 99%
“…As before, the discharge was standardized and calculated (after Cummans et al 1975) for hypothetical watersheds of three different sizes. Standard errors of the estimates are 25, 32, and 40% for the 2-year, 25-year, and lOa-year recurrence interval floods, respectively.…”
Section: Timing and Quantity Of Flowmentioning
confidence: 99%