How accurate is the Environment Agencys flood map?
The Environment Agency (EA) Flood Zones have been produced using a flood model known as JFLOW. JFLOW has been used to produce the 1% (1 in 100 year) and 0.1% (1 in 1000 year) flood outlines. The EA acknowledges that the JFLOW method is generalised and does not take flood defences into consideration. As such, the flood outlines produced by JFLOW can only be taken as a rough guide, showing where more detailed flood risk assessments are required.
