Types of flooding

River flooding (fluvial)

This occurs when a river cannot cope with the amount of water entering it.

Coastal flooding

Weather and tidal conditions can increase sea levels. 

Surface water flooding (pluvial)

This happens when there is heavy rainfall on ground that is already saturated, or on paved areas where drainage is poor.

Groundwater flooding

When rainfall causes the water that is naturally stored underground to rise to the surface it can flood low-lying areas.

Drain and sewer flooding

This can occur during heavy rain when drains have become blocked or full.

Broken water mains flooding

Burst water mains can cause flooding underground and to basements of properties.


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