Planning Portal

PPS 15: Planning and Flood Risk
Annex A: Estuarial Flooding

A5 Flooding in estuaries may occur either due to abnormal coastal or river flows or through a combination of the two factors where river flow is constricted by an incoming tide. A high tide and significant flow in the watercourse can cause flooding which may be characterised by flow speeds similar to coastal or tidal flooding.
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