Urban Development on Alluvial Fans

by Lan-Yin Li Weber, BSI Consultants Inc, Santa Ana, United States,
Virginia Bax-Valentine, BSI Consultants Inc, Santa Ana, United States,

Document Type: Proceeding Paper

Part of: Housing America in the Twenty-First Century


An increasing number of developments has been planned in areas subject to flood hazards. To protect developments from flood damage and to prevent accumulated negative effects on floodplains, agencies are enforcing tighter regulations. Where floodplain features are complicated, several regulatory entities may be involved, each with different design requirements. Awareness of up-to-date design procedures and regulations and early incorporation of flood control planning and engineering in site development are essential to the project success. Innovative approaches must be adopted when standard design methods are not applicable and design criteria and regulations are not well defined. Development on alluvial fans is one of these cases which continue to be a major challenge to regulatory agencies, developers, planners and engineers. This paper presents significant floodplain issues, engineering principles and current floodplain regulations specific for developments subject to alluvial fan flooding.

Subject Headings: Alluvial channels | Urban and regional development | Floods | Flood plains | Laws and regulations | Hydraulic design | Project management | Natural disasters

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