Evaluation of mixed-population flood-frequency analysis
Journal of Hydrologic Engineering
By: P.J. Murphy
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Abstract
A mixed population of flood flows was shown to cause quality-of-fit problems if a single-population flood-frequency distribution was used to describe the flood data. The three populations in this mix were "ordinary," tropical cyclone, and ice-jam-release floods. Parametric descriptions of the single and separated flood populations were evaluated using probability-plot correlation-coefficient tests. These tests quantified how well the flood-probability distributions agreed with plotting-position descriptions of the data and quantified the differences due to the mixed-population analysis. High outliers caused the high skewness found in the single- population analyses. The tropical cyclone component was underestimated by single-population analyses at gauging stations in Massachusetts that had little data.
Suggested Citation
Murphy, P., 2001, Evaluation of mixed-population flood-frequency analysis: Journal of Hydrologic Engineering, v. 6, no. 1, p. 62-70, https://doi.org/10.1061/(ASCE)1084-0699(2001)6:1(62).
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Evaluation of mixed-population flood-frequency analysis |
| Series title | Journal of Hydrologic Engineering |
| DOI | 10.1061/(ASCE)1084-0699(2001)6:1(62) |
| Volume | 6 |
| Issue | 1 |
| Year Published | 2001 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Hydrologic Engineering |
| First page | 62 |
| Last page | 70 |