Flood frequency: expected and unexpected probabilities
Open-File Report
76-775
By: D. M. Thomas
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Abstract
Flood-frequency curves may be defined either with or without an ' expeced probability ' adustment; and the two curves differ in the way that they attempt to average the time-sampling uncertainties. A curve with no adustment is shown to estimate a median value of both discharge and frequency of occurrence, while an expected probability curve is shown to estimate a mean frequency of flood years. The attributes and constraints of the two types of curves for various uses are discussed.
Suggested Citation
Thomas, D.M., 1976, Flood frequency: expected and unexpected probabilities: U.S. Geological Survey Open-File Report 76-775, iii, 7 p., https://doi.org/10.3133/ofr76775.
ISSN: 2331-1258 (online)
ISSN: 0196-1497 (print)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Flood frequency: expected and unexpected probabilities |
| Series title | Open-File Report |
| Series number | 76-775 |
| DOI | 10.3133/ofr76775 |
| Year Published | 1976 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | iii, 7 p. |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |