United States Department of Transportation
i
Evaluation of the flood risk factor in the design of box culverts, volume 1 : theoretical development.
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1979-09-01
[PDF-10.44 MB]
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OCLC Number:821222959
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Abstract:"The work presented in this report represents a preliminary effort to integrate economic factors with the physics of highway drainage. Conventional culvert design rests on the selection of a flood peak flow having a particular return period; for example, the flood flow expected to occur once in a hundred-year period. A culvert is designed to pass the selected flood flow. To date, however, the question of the economic and social consequences of conventional culvert design practice has been begged. A glimpse of insight into this unsettled question is the goal of this report. The general objective is to develop an engineering analysis procedure to reduce flood-related damage to highways on a sound probabilistic basis, considering hydrologic, hydraulic, and economic factors. This objective is implemented using a computerized procedure; the theoretical development, analysis of the procedure, and interpretation of results are the subjects of Volume I, while Volume II describes and documents the computer codes. In brief, construction costs are estimated and balanced against economic losses which are found by the dynamic routing of floods through the stream crossing to estimate damage. Repetitive calculations are performed which include flood routing, estimating embankment failure, and the tallying of resultant losses. A probabilistic approach is employed to determine expected losses."
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