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Groundwater levels

East Region

 

East region water levels hydrograph

*The long term average (LTA) has been calculated statistically, using the long term data record for this hydrograph. The respective drought zones are used as operational triggers, and have been derived using the LTA.


Rainfall in our East region was well below average in April, at 62% of the LTA. Rainfall over the recharge period (October to March inclusive) has been 86 % of the LTA and effective precipitation over this period has been 57 % of the LTA. As a result of the dry winter, Chalk groundwater levels have dipped into drought trigger 1 and are likely to remain in this trigger zone during the seasonal recession under rainfall scenarios of between 60% and 120% LTA. Please refer to our Drought Plan for what this means for us and our customers (Plans - Drought management plan - Affinity Water).

The continued below average rainfall through April has limited recovery of river flows, and those in our East region are currently categorised as ‘below normal’ or ‘notably low’ by the Environment Agency.

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