South East Coast (NSW)
October 2019 Summary
Rainfall was lower than average across 80 per cent of the area, particularly inland along the ranges. Mean rainfall was 30 mm, 58 per cent lower than the long-term mean of 72 mm for October.
Streamflows were lower than average at 92 per cent of the gauging stations, with very much below average to lowest on record since 1980 streamflows occurring at 75 per cent of the sites. At 16 sites, mainly in the in the north and far south of the drainage division, streamflows were the lowest for October since 1980. Four of the sites did not register any flow at all for the first October since 1980.
Median streamflow salinity (electrical conductivity) varied between sites from 307 to 3309 μS/cm. Streamflow was fresh for two sites and brackish for another two. Bayswater Creek at Liddell had the highest salinity of all sites.
During October, the accessible storage volume decreased in four systems and remained stable in one. By the end of the month, the volume of water stored was 47 per cent of the total accessible capacity, a decrease of 15 per cent from the same time last year. Sydney continued to decrease despite the desalination plant running at full capacity and the introduction of Level 1 water restrictions in June.
|Rainfall decile group||Percentage of area|
|Highest on record since 1900||0%|
|Very much above average||0%|
|Very much below average||17%|
|Lowest on record since 1900||Less than 1%|
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