Item 26 - Updated Hazard Mitigation Plan

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Hazard Mitigation Plan | 2022 Risk Assessment - 43 - It’s important to note that the HAZUS maps and reports on flooding, that loss estimations are for specific riverine scenarios. FEMA flood maps are not used in HAZUS analysis, in that it does not use historical flood data as an input. However, physical data (i.e., USGS DEM, or Depth Grids) are used to define the terrain in the study area. Once a scenario is chosen (100-year, 500-year) the model estimates the physical, economic, and social impacts of that one event, a snapshot in time. HAZUS analysis does not supersede the comprehensive investigation of FEMA Flood Maps, the results will never match exactly the flooding areas found on FEMA flood maps. However, if you compare the two, you'll be able to verify areas of potential flood risk, and the result from the model will aid to identify the possible damages and the financial cost from that event. HAZUS Outputs The user plays a major role in selecting the scope and nature of the output of a HAZUS analysis. A variety of maps can be generated for visualizing the extent of the losses. Numerical results may be examined at the level of the census block or tract or may be aggregated by county or region. There are three main categories of HAZUS outputs: direct physical damage, induced damage, and direct losses. Direct physical damage includes general building stock (GBS), essential facilities, high potential loss facilities, transportation systems, utility systems, and user defined facilities. Induced damage includes building debris, tree debris generation and fire following disaster occurrence. Direct losses include losses for buildings, contents, inventory, income, crop damage, vehicle loss, injuries, casualties, sheltering needs and displaced households.