A flood having a 1% chance of being equaled or exceeded in any given year. This flood is sometimes called the 1% or 100-year flood.
Base Flood Elevation (BFE)
This is the elevation above the average sea level that waters from a 1% (100-year) flood will reach at a given point along a creek or bayou. These elevations are determined using hydrology and hydraulic computer models. The elevations are then mapped on the topographic data for the county to produce the 1% (100-year) floodplain.
Represents the overall efficiency of a plan. Determined by dividing the value of the annual benefit by the annual cost.
Best Management Practices
The replacement, extension or reinforcement of a bridge in order to remove an impediment to flow or accommodate a channel enlargement.
The elimination of potential flood damages to houses or other types of structures by acquiring them and removing them.
The construction of a new channel in order to convey stormwater runoff around an area. Usually required due to right-of-way considerations or to avoid environmentally sensitive areas.