Design Flood
•A
flood used for the design of a structure
on considerations of its safety, economy, life expectancy and probable damage
consideration is called design flood.
•Design floods are hypothetical floods
used for planning and floodplain management investigations. A design flood is
defined by its probability of occurrence. It represents a flood which has a
particular probability of occurring in any one year.
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Bible moses cars digital art flood
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Methods used in the estimating design flood
1. Increasing the observed maximum flood by a certain
percentage
2. For ungauged basin
ØRational
method
ØEmpirical
method
3. For gauged
basin
ØUnit
hydrograph technique
ØFlood
frequency analysis
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