THE FLOOD RECOVERY GUIDANCE FOR MY COMMUNITY SHOWS THE ADVISORY BASE FLOOD ELEVATIONS BEING CALCULATED USING FREEBOARD. WHAT IS FREEBOARD AND HOW WERE THE FREEBOARD ELEVATIONS DETERMINED?
Freeboard represents a safety factor expressed in feet above a known flood elevations and tends to compensate for the many unknown factors that could contribute to flood heights greater than the height calculated for a selected size flood. As stated previously, FEMA conducted a new flood frequency analysis incorporating storm data from the past 35 years, including data from Katrina and Rita, tide gage records, and other engineering studies. The results of the analysis were advisory Stillwater elevations for coastal Louisiana Parishes. The results of the flood frequency analysis suggests that current storm surge elevations are relatively unchanged; however, due to land subsidence and loss of protective coastal barrier over the last 10 to 20 years, higher storm surges and large waves can be expected to propagate further inland that previously estimated. For these reasons, FEMA expects BFEs to increase as it completes a more comprehensive storm surge modeling effort and is encouraging som
Related Questions
- THE FLOOD RECOVERY GUIDANCE FOR MY COMMUNITY SHOWS THE ADVISORY BASE FLOOD ELEVATIONS BEING CALCULATED USING FREEBOARD. WHAT IS FREEBOARD AND HOW WERE THE FREEBOARD ELEVATIONS DETERMINED?
- THE FLOOD RECOVERY GUIDANCE FOR MY COMMUNITY SHOWS ADVISORY BASE FLOOD ELEVATIONS BEING CALCULATED USING ADVISORY STILLWATER ELEVATIONS. HOW WERE THESE STILLWATER ELEVATIONS DERIVED?
- IS MY COMMUNITY REQUIRED TO USE THE ADVISORY BASE FLOOD ELEVATIONS DEVELOPED USING THE METHODS IN THE FLOOD RECOVERY GUIDANCE?
