100 Year Floodplain Maps

100 Year Floodplain Maps. Explore geographic data with this interactive ArcGIS web application. 1 in 350-year flood plain mapping is prepared as part of the overall flood plain mapping update program

The Federal Emergency Management Agency (FEMA) provides digital flood insurance rate maps (DFIRM) depicting 100-year flood hazard zones in order to determine which properties require the purchase of flood insurance Any place with a 1% chance or higher chance of experiencing a flood each year is considered to have a high risk

Most Conservation Authority floodplain mapping is along rivers and creeks. Approximately 22,000 km of flood prone areas have been mapped by conservation authorities Explore geographic data with this interactive ArcGIS web application.

. Floodplain mapping relies on field surveys, engineering analysis and hydrologic and hydraulic modelling. Approximately 22,000 km of flood prone areas have been mapped by conservation authorities

. Prioritization has been based on required 1 in 100-year flood plain mapping updates which, outside of the Ottawa and Rideau Rivers, has historically focused on areas of growing development The goal of this project is to understand the location of that 100-year flood line