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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 well below average in May at 45% of the Long Term Average (LTA). Over the last three months (March to May inclusive), our Central region has received below average rainfall (45% of the LTA) and below average effective precipitation (27% of the LTA). Soil Moisture Deficit (SMD) remains well above average levels for the time of year, meaning any forthcoming rainfall is unlikely to contribute significantly to groundwater recharge.
Groundwater levels continued to decline through May due to below average rainfall and effective precipitation the last three months. Groundwater levels however are likely to remain above average over the next six months if rainfall is greater than 60% of the LTA. Groundwater levels are currently in a higher position than the above average conditions experienced in 2020-21 but in a lower position than 2000-01 and 2013-14 at the end of May.
Please refer to our Drought Plan for further information about droughts and how we manage them.