Comparison of Design Rainfall Criteria for the Southwest

by George V. Sabol, George V. Sabol consulting Engineers, Inc, Brighton, United States,
Kenneth A. Stevens, George V. Sabol consulting Engineers, Inc, Brighton, United States,

Document Type: Proceeding Paper

Part of: Hydraulics/Hydrology of Arid Lands (H²AL)


The design of drainage and flood control facilities or the management of floodplains for alluvial fans is extremely sensitive to the design rainfall criteria that is used as input to the hydrologic model. The results of a study using several combinations of design rainfall criteria in deterministic rainfall-runoff models of watersheds is presented. The results indicate that some of the more commonly used design rainfall criteria may not adequately represent the rainfall characteristics of the southwest. It is concluded that design rainfall criteria for the southwest must represent both the spatial and temporal characteristics of regional severe storms if valid models for use on alluvial fans are to be developed and used.

Subject Headings: Comparative studies | Rainfall | Building design | Hydraulic design | Rainfall-runoff relationships | Drainage | Flood plains | Rain water | United States

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