DAM/Specific/TBT-DAM-007

Flood Barrier Deployment

Dams, Reservoirs & Flood Defence › Specific › Flood Barrier Deployment

Presenter		Project
Location		Date

Temporary flood barriers are deployed to protect construction sites and communities from rising water.
Types include inflatable barriers, modular panel systems, sandbag walls, and water-filled tube barriers.
Deployment must be rapid — flood events can escalate from warning to peak within hours.
Barriers must be positioned on firm ground and sealed at ends and junctions to prevent bypass.
Water pressure behind barriers is significant — a 1 metre head of water exerts 5 kN per metre run.
Workers deploying barriers near rising water face drowning, cold water shock, and slip hazards.
Personal flotation devices must be worn by all personnel during flood barrier deployment operations.
The Environment Agency provides flood warnings that should trigger pre-planned deployment procedures.
Regular training and practice deployments ensure the team can act quickly when a real event occurs.
After the flood recedes, barriers must be inspected, cleaned, and stored ready for the next event.

Drowning risk	Workers deploying barriers alongside rising floodwater face serious drowning hazards.
Time critical	Flood events escalate rapidly — delays in deployment allow water to breach defences.
Structural failure	Incorrectly deployed barriers collapse under water pressure causing sudden flooding.
Preparedness	Without regular practice, deployment teams cannot respond effectively under pressure.

Don't

Activate the deployment plan immediately when flood warnings are received.
Wear personal flotation devices during all barrier deployment activities near water.
Position barriers on firm, level ground and seal all junctions and end connections.
Monitor water levels continuously during the flood event and adjust defences.
Brief the deployment team on roles, routes, and safety procedures before starting.
Use sandbags or ballast to stabilise barriers against water pressure.
Maintain communication between the deployment team and the site emergency controller.
Practice deployment drills regularly so the team can respond quickly in a real event.
Inspect all barriers and connections during the event for signs of failure.
Clean, inspect, and repack barriers after use ready for the next deployment.

DON'T deploy barriers without wearing personal flotation devices near water.
DON'T position barriers on soft or unstable ground that may wash away.
DON'T leave gaps at barrier junctions or ends — water will bypass the defence.
DON'T wade into floodwater to position barriers — hidden hazards cause drowning.
DON'T delay deployment waiting for authorisation — act on the flood warning plan.
DON'T underestimate the force of water — even shallow flowing water knocks people down.
DON'T leave deployed barriers unmonitored during the flood event.
DON'T skip practice deployments — they are essential for effective real response.
DON'T assume the barrier will hold indefinitely — monitor and reinforce as needed.
DON'T store barriers after use without cleaning and inspecting them for damage.

See also: Flood Defence Construction Safety | Flood and Extreme Weather Response

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