Peak Frequency Curves for the Middle Rio Grande

by Kenneth L. Bullard, U.S. Bureau of Reclamation, Boise, United States,



Document Type: Proceeding Paper

Part of: Engineering Hydrology

Abstract: To define peak flow frequency curves for ten sites in the highly controlled and regulated Middle Rio Grande, an approach which relates peak inflow and peak outflow from the reservoirs for the same return periods, not necessarily the same flood events, was developed. This approach was required since the flood regulation by the reservoirs was not traditional for smaller return period floods. This approach allowed the effects of regulation to be removed and an unregulated data set of peak flows to be derived for each gauge site. The unregulated data sets were then extended using a two station analysis, with the longest records in the basin, and regionally adjusted for skew factor. The unregulated frequency curves were then readjusted to show the effects of regulation for specific return period peak flows.

Subject Headings: Curvature | Flood frequency | Regulated flow | Peak flow | Return flow | Flow control | Water flow | Reservoirs | Rio Grande

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