Single-Channel Alluvial Fan Hydraulics with Application to Design of Medium-Density Projects

by Joseph C. Hill, County of San Diego, United States,
William F. Spalding, County of San Diego, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Methods to identify flood hazards on alluvial fans are provided by the Federal Emergency Management Agency (FEMA) in their Flood Insurance Study, Guidelines and Specifications for Study Contractors. Using these guidelines, FEMA and the County of San Diego have cooperatively developed an alluvial fan study and map that are used for flood insurance and regulation of development. Hydraulic equations used for fan analysis are described and applied to design of medium-density projects. These projects must be designed so there will not be an adverse affect on adjoining property and construction will not be damaged by alluvial fan events.

Subject Headings: Hydraulic design | Alluvial channels | Insurance | Floods | Flood plains | Federal government | Sediment transport | California | United States

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