Self Activating

Flood Barrier

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Flow Defence™ self activating flood barrier:

Why do roads flood?

Roads are not only used by vehicles, they are also overland flow paths for flood water
In minor storm events drains convey stormwater, in major storm events roads convey stormwater
Engineering guidelines aim to control the depth of stormwater on roads to about 250mm
Flood water depths on roads can increase during intense storm events or in low lying areas that are impacted by tidal effects, storm surge and overland flow

Properties along the roadway and access ramps to basements are at risk of flooding.

The Flow Defence passive self activating flood barrier intercepts flood water in an underground chamber.

In minor storm events the buoyant barrier will not activate
A submersible pump keeps the chamber drained to ensure that the barrier will only activate when necessary

Flood barriers are usually installed on the crest of a driveway at the property boundary
Council will not approve a barrier being installed in the footpath so space is limited
Less surface area is required if the barrier moves straight up and down during operation
Tilting barriers require more surface area to operate than the Flow Defence™ barrier

Flood water can reach different depths depending on the intensity
Self activating flood barriers raise and lower with the height of flood water
While the barrier is floating there is no need for human intervention
If the flood barrier does not retract after a flood event, personnel and equipment are required to lower the heavy flood barrier

Flood water can contain rocks, branches, sediment and various other materials
The FD passive self activating flood barrier is built from robust components that can withstand impact from flood water containing debris
After a flood event it is important that debris carried by the flood water does not affect the barrier operation
If the barrier traps debris after a flood event, personnel and equipment are required to lift and clean the heavy barrier

Flow Defence™ barrier = large debris will not get under the barrier
Sediment and gravel may find its way to the bottom of the chamber but large debris is prevented from passing through the surface grates

Traditional tilting barrier = large debris can get under the barrier
Drains can clear sediment but the barrier should be cleared after a flood has receded

Intercepts floodwater after heavy rain or storm surge

Operates without power or human intervention

Barrier remains traversable until critical period activation

Full time protection from unforeseen weather

Reduced clean up costs caused by extreme storm events

Hydraulic flood simulations during product development

Flow Defence™ is protected by Trade Mark Number 1880447

Flow Defence™ Flood Barrier is Protected by International Granted Patents WO/2015/120516