TL;DRAbstract
To determine the hazard classification of a proposed dam 1 or reevaluate the hazard classification of an existing dam, an incremental flood analysis is required. The first step in an incremental flood analysis is to determine downstream flood depths and velocities without the dam to establish baseline flooding conditions. The second step is to determine the increased flood depths and velocities associated with dam failures during the same hydrostatic and hydrodynamic loading conditions. These loading conditions include several storm events that will or could occur during the lifespan of the dam. The storms to be examined include the following loading conditions: 1) normal pool, 2) 100-year flood, 3) brim-up flood, 4) 50% probable maximum flood (PMF) and 5) PMF. The normal pool or sunny day loading condition is the breach flow released from the dam during a normal pool failure. If there is no permanent pool, a sunny day failure would be assumed to occur at the first large opening in the
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To determine the hazard classification of a proposed dam 1 or reevaluate the hazard classification of an existing dam, an incremental flood analysis is required. The first step in an incremental flood analysis is to determine downstream flood depths and velocities without the dam to establish baseline flooding conditions. The second step is to determine the increased flood depths and velocities associated with dam failures during the same hydrostatic and hydrodynamic loading conditions. These loading conditions include several storm events that will or could occur during the lifespan of the dam. The storms to be examined include the following loading conditions: 1) normal pool, 2) 100-year flood, 3) brim-up flood, 4) 50% probable maximum flood (PMF) and 5) PMF. The normal pool or sunny day loading condition is the breach flow released from the dam during a normal pool failure. If there is no permanent pool, a sunny day failure would be assumed to occur at the first large opening in the
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