Southeast 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.
*Drought zone 1 is the LTA in Southeast region.
Rainfall in our Southeast region was above average in September at 134% of the Long Term Average (LTA)). Over the last three months (July to September inclusive), our Southeast region has received equal to average rainfall (99% of the LTA) and below average effective precipitation (71% of the LTA). Soil dryness (SMD) is currently above average levels for the time of year, meaning that any forthcoming rainfall is likely to contribute less to groundwater recharge than average.
Groundwater levels continue to decline at a similar rate to the LTA but remain above average due to the above average rainfall last recharge period. Groundwater levels are likely to remain above average over the next six months if rainfall is more than 80% of the LTA. Groundwater levels are currently in a higher position than the above average conditions experienced in 2014 and 2021 and in a similar position with 2001 at the end of September.
Please refer to our Drought Plan for what this means for us and our customers.