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Overbank Flow and Floods
Overbank flows considered beneficial, but damaging floods detrimental.
Overbank flow defined as maximum daily flow with 1.67 year recurrence interval (Default).
Damaging flood defined as maximum daily flow with 25 year recurrence interval (Default).
Scoring based on frequency of either under baseline and alternative.
Notes:
The idea here is that overbank flows are generally beneficial for ecological and geomorphological processes, but too much of a good thing can cause problems. We have defined the defaults for overbank flows and damaging flows as shown on the slide. These values are specific to the hydrologic nodes used in the DSS, but the threshold values can be changed by the user on the “parameters” page.