An Evaluation of Urban Design Storm Sensitivity

This paper describes an evaluation of the assumption commonly employed in drainage design that the return period of the rainfall used to design a system is the same as the peak flow produced by that rainfall. Specifically, the sensitivity of the frequency response of three catchments to design storm...

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Bibliographic Details
Published inWater science and technology Vol. 16; no. 8-9; pp. 219 - 236
Main Authors Wenzel, H G, Voorhees, M L
Format Journal Article
LanguageEnglish
Published London IWA Publishing 01.08.1984
Subjects
Catchment area
Catchments
Computer simulation
Design
Design parameters
Design storms
Duration
Evaluation
Frequency analysis
Frequency dependence
Frequency response
Graphs
Hyetographs
Parameter sensitivity
Parameters
Rain
Rainfall
Sensitivity
Sensitivity analysis
Soil
Soil moisture
Storms
Urban planning
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Summary:This paper describes an evaluation of the assumption commonly employed in drainage design that the return period of the rainfall used to design a system is the same as the peak flow produced by that rainfall. Specifically, the sensitivity of the frequency response of three catchments to design storm parameters is examined. Parameters include, hyetograph shape, antecedent soil moisture and rainfall duration. A continuous simulation model is used to compute simulated historical frequency responses for three different long term rainfall records. Design storms are also developed from depth-duration-frequency analysis of the rainfall data. Comparisons are made on frequency graphs. It is concluded that significant parameter sensitivity exists but that an appronriate choice of design storm parameters can produce a design which yields peak flows of the desired return period.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.1984.0193