Prediction of Flood Quantiles at Ungaged Watersheds in Louisiana: Technical Summary

Naghavi, Babak; Cruise, J.F.; Ekanayake, S.; Louisiana Transportation Research Center

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Prediction of Flood Quantiles at Ungaged Watersheds in Louisiana: Technical Summary

1989-12-01
By Naghavi, Babak ; Cruise, J.F. ; Ekanayake, S.

[PDF-100.26 KB]

English

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Creators:

Naghavi, Babak ; Cruise, J.F. ; Ekanayake, S.

Naghavi, Babak ; Cruise, J.F. ; Ekanayake, S. Less -
Corporate Creators:

Louisiana Transportation Research Center
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:

[+]

Alternatives Analysis Data And Information Technology Drainage Equations Estimating Floods Generalized Extreme Value Highways Hydraulics And Hydrology I26: Water Run-off - Freeze-thaw Information Processing Regionalized Log Pearson Type 3 Streamflow Two Component Extreme Values Watersheds
Publication/ Report Number:

229
Resource Type:

Tech Report
Geographical Coverage:

Louisiana ; United States

Louisiana ; United States Less -
TRIS Online Accession Number:

00601535
Corporate Publisher:

Louisiana Transportation Research Center
Abstract:

Four popular regional flood frequency methods were compared using Louisiana stream flow series. The state was divided into four homogeneous regions and all undistorted, long-term stream gages were used in the analysis. The GEV, TCEV, regional LP3 and USGS regression methods were applied to this data base and compared in terms of descriptive capabilities. Based upon several factors, the GEV method was selected as the superior method overall. A procedure to apply this method to ungaged watersheds using regression equations and regional non-dimensional flood distribution was then developed. It was found that the procedure performed well when applied to data not used in the calibration of the model. The method is easier to apply and more accurate in terms of descriptive and probably predictive ability than any other feasible method.
Format:

PDF
Funding:

89-2SS(B)&89-3SS(B)
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:eecaf05181c7224bb387b6a8ccd048824492d40da20610215a3ae7308b28fc9b
Download URL:

https://rosap.ntl.bts.gov/view/dot/39427/dot_39427_DS1.pdf
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Prediction of Flood Quantiles at Ungaged Watersheds in Louisiana: Technical Summary

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