Category Archives: Groundwater flooding

Why are Chalk Valleys Most Prone to Groundwater Flooding?

As I write this, communities in Dorset, Hampshire, Berkshire, Wiltshire, Surrey and West Sussex are suffering from groundwater flooding. Exceptional winter rainfall has caused the water table to rise above the ground surface, so that groundwater is emerging in springs, stream beds and sewers across the South of England. All of the villages in the news that I’ve seen, with groundwater flooding are on, or just downstream of, the Chalk aquifer (Chalk outcrop is pale green in the image below). Why the Chalk in particular?

Chalk groundwater flooding

Some locations with groundwater flooding, January 2014

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Using groundwater model results to estimate baseflow contribution to flooding in Hull


While we* were developing the groundwater resource model for the Yorkshire Chalk aquifer, we were asked to provide estimates of extreme baseflows to the River Hull headwaters. Most of the material in this post was delivered, on behalf of ESI Ltd, by Dr Steve Buss at the British Hydrological Society Pennines Group conference on Groundwater Flooding, in Leeds, on 1 October 2013.

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