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Mitigation of Flood Hazard on Alluvial Fans

by Julianne J. Miller,
Richard H. French, (M.ASCE),



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

A number of investigators have suggested that the limits of the traditional, stochastic, one-dimensional model of alluvial fan flooding have been reached and that there are one- and two-dimensional deterministic models available that can provide more accurate results. French (1992) modified the regulatory (FEMA) alluvial fan model to provide estimates of flood discharges impacting transportation alignments crossing alluvial fans in the southwestern United States. This modified model was used to estimate peak flood discharges to railroad alignments crossing three alluvial fans in southern Nevada (Flippin and French, 1994); the results were compared with railroad maintenance records documenting damage to these alignments extending over a 75-year period.

Subject Headings: Alluvial channels | Floods | Two-dimensional models | Model accuracy | Alignment | Water discharge | Stochastic processes | United States | Nevada

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