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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 significantly below average in April, at 11% of the LTA. This marked the third month in a row with below average rainfall, and as a result groundwater levels have continued to decline more quickly than the LTA. Despite this, groundwater levels remain above average for the time of year, which is due to the high rainfall received overall in the earlier part of the recharge period (October to January inclusive). Predictions indicate that under a range of rainfall scenarios, levels are likely to continue to decline from this point, and they are likely to reach the LTA curve in early summer this year. Average or above average rainfall will likely result in them tracking the LTA curve from that point. Continued low rainfall could result in levels reaching drought trigger 1 in summer this year.

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