Central Region
*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 Central region was above average in March at 157% of the Long Term Average (LTA). Over the last three months (January to March inclusive), our Central region has received above average rainfall (135% of the LTA) and effective precipitation (156% of the LTA). As a result, soils remain wetter than average, meaning any forthcoming rainfall will provide a greater contribution to groundwater recharge.
Groundwater levels have remained above average through March and continue to increase more quickly than the LTA due to the above average rainfall over the autumn and winter period. Groundwater levels are likely to remain above average over the next seven months if rainfall is more than 60% of the LTA. As a result of the above average levels, groundwater will be able to provide additional support to chalk stream flows this summer. Groundwater levels are currently in a higher position than the above average conditions experienced in 2020/21 but lower than the conditions experienced in 2013/14 at the end of March.
Please refer to our Drought Plan for further information about droughts and how we manage them.