Additional Years of Record and Peak Discharge

by Rollin H. Hotchkiss, Univ of Nebraska, Lincoln, United States,
Kent Cordes, Univ of Nebraska, Lincoln, United States,



Document Type: Proceeding Paper

Part of: Engineering Hydrology

Abstract:

The effect of additional years of stream gaging records is analyzed for stream gages in Nebraska. Frequency estimates are based on procedures outlined in Bulletin 17B, including skew coefficient weighting, outlier effects, and zero flow treatment. An average of 56% more years of record exist for the gages since last analyzed. Results of the additional years of record indicate that peak discharges are generally lower for the 2-, 10-, 50-, and 100-year floods. The standard error of the skew coefficient also decreased.

Subject Headings: Water discharge | Streamflow | Skewness | Rivers and streams | Hydraulic design | Fluid flow | Flood frequency | Nebraska | United States

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