Wednesday, 20 August 2014

Hydrological Outlook from August 2014

The latest Hydrological Outlook states that the groundwater levels in August will generally be unaffected by the amount of rainfall we have.  This is because large soil moisture deficits have built up over the summer and rainfall will not reach the water table while these deficits exist.

Looking further ahead, the prediction for precipitation over the next 3 months is not a clear "wet" or "dry" scenario:  "The probability that UK precipitation for August-September-October will fall into the driest of five categories is around 20% and the probability that it will fall into the wettest category is 25-30%".  The timing of the soil moisture deficit being overcome by rainfall (and the reduced efforts of sunshine and plants in evaporation and transpiration), and thus the groundwater recharge season starting, will depend upon when the rain falls, and how persistent it is.

The general outlook is for groundwater levels to be in the near-normal range across the majority of aquifers.

For further information see the full Hydrological Outlook for August.

[Apologies for not posting this sooner.]

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