Why are the floodplain maps changing?

Floodplain maps need to be updated on a regular basis as more land is developed, as additional flood
protection facilities are built, and as more scientific information becomes available. Since technology has
improved and methodologies have changed, it is possible to more accurately map the floodplain areas.
Consequently, the floodplain maps are changing - and will continue to change in the future - as new
improvements are made and development occurs.