How are the floodplain maps created?
A. The new floodplain maps are created from computer models that simulate rainfall and the effect of runoff, the slope of the land, soil types, culverts, bridges and the depth and width of streams. The county and cities used better and more current topography, current development as well as future development in each watershed to update floodplain boundaries for current conditions and those that are likely to occur as development takes place.
