October 2017 Summary
Rainfall was average or higher than average across 93% of the area. It was mainly above average to very much above average in the north and average to below average in the south. Mean rainfall was 55 mm, 45% higher than the 1900 to 2016 mean of 38 mm for October.
Streamflows reflect the rainfall patterns and were above average to very much above average in the north and average to below average in the south. Bungil Creek at Tabers had the highest streamflows for October since 1980 due to high rainfall. Streamflow data are not yet available this month for 13 sites in southern part of the Murray-Darling Basin. When data become available the page will be updated.
Median streamflow salinities varied between 30 and 5788 microSiemens/cm. Streamflows were high quality or fresh for 74% of the sites and brackish for 15%. Burra Creek at Worlds End (Low Flow) had the highest salinity of all sites. Streamflow salinity data are not yet available this month for 11 sites in southern part of the Murray-Darling Basin. When data become available the page will be updated.
During October, storage volumes increased in four systems, decreased in 10 and remained stable in four. By the end of the month, the volume of water stored was 71% of the total accessible capacity, a decrease of 12% from the previous year. Water in storages in the northeast increased due to reduced diversions at major irrigation off-takes in response to high rainfall. Water in storage in the Murrumbidgee system dropped by 8% during this month due to diversions in the irrigation areas.
|Rainfall decile group||Percentage of area|
|Highest on record since 1900||Less than 1%|
|Very much above average||23%|
|Very much below average||Less than 1%|
|Lowest on record since 1900||0%|
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