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Evaluating the Form of the Rational Equation

Young, C. Bryan / McEnroe, Bruce M.

The Rational method is widely used in the design of hydraulic structures, such as storm sewers and culverts. Many engineers consider the Rational equation a rule-of-thumb method and dismiss it in favor of regional flood-frequency equations. This paper presents a regional flood-frequency analysis of 72 gaged watersheds in Kansas, ranging in size from $0.44 - 76.7 {km}^{2}$ . The analysis results in regression equations for the 2-year to 100-year peak discharges that are statistically indistinguishable from the Rational equation. The resulting Rational equations explain more of the variance in flood quantiles than the standard form of the USGS regional flood-frequency equations that are used in Kansas.

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Evaluating the Form of the Rational Equation

Young, C. Bryan / McEnroe, Bruce M.

The Rational method is widely used in the design of hydraulic structures, such as storm sewers and culverts. Many engineers consider the Rational equation a rule-of-thumb method and dismiss it in favor of regional flood-frequency equations. This paper presents a regional flood-frequency analysis of 72 gaged watersheds in Kansas, ranging in size from $0.44 - 76.7 {km}^{2}$ . The analysis results in regression equations for the 2-year to 100-year peak discharges that are statistically indistinguishable from the Rational equation. The resulting Rational equations explain more of the variance in flood quantiles than the standard form of the USGS regional flood-frequency equations that are used in Kansas.

Evaluating the Form of the Rational Equation

Young, C. Bryan / McEnroe, Bruce M.

The Rational method is widely used in the design of hydraulic structures, such as storm sewers and culverts. Many engineers consider the Rational equation a rule-of-thumb method and dismiss it in favor of regional flood-frequency equations. This paper presents a regional flood-frequency analysis of 72 gaged watersheds in Kansas, ranging in size from $0.44 - 76.7 {km}^{2}$ . The analysis results in regression equations for the 2-year to 100-year peak discharges that are statistically indistinguishable from the Rational equation. The resulting Rational equations explain more of the variance in flood quantiles than the standard form of the USGS regional flood-frequency equations that are used in Kansas.

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Title:

Evaluating the Form of the Rational Equation

Contributors:

Young, C. Bryan (author) / McEnroe, Bruce M. (author)

Published in:

Journal of Hydrologic Engineering ; 19 ; 265-269

Publication date:

2012-12-15

Size:

52014-01-01 pages

ISSN:

1084-0699 , 1943-5584

DOI:

https://doi.org/10.1061/(ASCE)HE.1943-5584.0000769

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

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