Flood Points in your home

Facts About Flood Risk

What is flooding how does it happen and what is the effect?

How Dameasy Flood Barriers can protect your home

There are four facts about flooding that are of particular importance:

Flood depths expected at your house. Low depths, for example 100mm, are unlikely to put people at risk but water damage to buildings and contents may be significant without any flood protection. High water depths, for example 1m, may severely threaten the safety of people and may cause extensive damage to buildings. It may be dangerous to keep deep floods out of a building because of large weight of water pressing against the structure.

Flood duration is the time that flood water is expected to stay at your house. Temporary flood defences may successfully keep water out if flooding is expected to last for a few hours, whereas, long flood durations may give time for water to penetrate the building. It may be safe to take refuge and stay in a building for short duration floods but this will depend on other factors.

Flood onset is the time for flood water to reach your house from its source. Short onset flooding (flash floods) are particularly dangerous as there is little time available to get people to safety or protect buildings.

Flood annual probability is a measure of the chance of flooding to your house over the course of 1 year. Different approaches to flood protection may be needed depending upon how likely flooding is expected.

Types of Flooding

What are the types of flooding?

Tidal: From the sea or tidal rivers. Often sudden and extreme.

Flash: In areas with steep slopes, heavy rain can cause a riverbed that held very little or no water at first, to suddenly brim with fast flowing water.

Urban: This is surface-water flooding will arrive when urban drainage systems are overwhelmed by sudden heavy rainfall, exacerbated by concreting over large areas of soil and gardens.

Fluvial: On flood plains when a river breaks it banks due to rainfall, snow or ice melt exceeding the capacity of the water course.

Pluvial: This can happen in relatively flat areas when the ground is saturated beyond capacity and or when rainwater enters a water system and can’t be stored.

In cases such as tidal and flash flooding, measures greater than protecting the structure of the home are required.

Sea defence, permanent barriers and large scale drainage schemes are the first line of defence.

Urban, fluvial, pluvial flooding can be defended with either home specific drainage works, structural changes and domestic flood defences.

dameasy flood barrier no tools required