Floodplain

A floodplain is land adjacent to a watercourse over which water flows or would flow in times of flood, if defences were not in place.

The flood zone area classification system devised by the Environment Agency refers to:

• Flood Zone 1: Land outside the floodplain. There is little or no risk of flooding in this zone.
• Flood Zone 2: The area of the floodplain where there is a low to medium flood risk.
• Flood Zone 3: The area of the floodplain where there is a high risk of flooding.

Ref The HS2 London-West Midlands Environmental Statement, Department for Transport, November 2013.

[edit] Related articles on Designing Buildings Wiki.

• Applying flood resilience technologies GG 84.
• Building flood resilience.
• Catchment flood management plans.
• Coastal defences.
• Environment Agency.
• Flood.
• Flood and Water Management Act.
• Flood defences.
• Flood insurance.
• Flood risk.
• Flood risk assessment.
• Flood risk management plans.
• Future flood prevention.
• Pitt Review.
• River engineering.
• Sustainable urban drainage systems.
• Thames barrier.
• Water engineering.