Category:748 Hydraulics and Drainage: Difference between revisions

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To produce the most practical and flexible design, each hydraulic design aspect and the associated flood frequency must be considered and established based upon the relative risks and costs. The flood ''frequency'' establishes a design storm and associated discharge; EPG 748 ''criteria'' establish the acceptable level of performance for that event. In lieu of a single “design flood frequency”, the flood frequency associated with each hydraulic design aspect will be shown on the plans, i.e., “backwater design frequency”, “roadway design frequency”, “freeboard design frequency”, etc.
!style="background:yellow"|'''[[Key Points 700 Hydraulics|Key Points - Hydraulics]]'''
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To produce the most practical and flexible design, each hydraulic design aspect and the associated flood frequency must be considered and established based upon the relative risks and costs. The flood ''frequency'' establishes a design storm and associated discharge and the ''criteria'' establishes the acceptable level of performance during that event. In lieu of a single “design flood frequency”, the flood frequency associated with each hydraulic design aspect will be shown on the plans, i.e., “backwater design frequency”, “roadway overtopping design frequency”, “freeboard design frequency”, etc.
[[131.1 Design Exception Process|Design exceptions]] for frequency or criteria are encouraged when they are practical.
 
The Design High Water Elevation (DHW) will be based on the return period of the freeboard design. [[131.4 Design Exception Process|Design exceptions]] for frequency or criteria are encouraged when they are practical.

Latest revision as of 13:30, 9 June 2014

To produce the most practical and flexible design, each hydraulic design aspect and the associated flood frequency must be considered and established based upon the relative risks and costs. The flood frequency establishes a design storm and associated discharge; EPG 748 criteria establish the acceptable level of performance for that event. In lieu of a single “design flood frequency”, the flood frequency associated with each hydraulic design aspect will be shown on the plans, i.e., “backwater design frequency”, “roadway design frequency”, “freeboard design frequency”, etc.

Design exceptions for frequency or criteria are encouraged when they are practical.

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