Christmas rain helps bolster water levels over holiday period

Christmas rain helps bolster water levels over holiday period

04 January 2021

Healthy Christmas holiday rainfall across parts of New South Wales has resulted in a rise in river flows and dam levels in the Northern parts of the state and the Hunter and North Coast, while metropolitan storages remain close to full.

“Rain events in late December produced significant streamflow in the Gwydir and Namoi valleys, enabling us to announce supplementary access for customers along those rivers,” WaterNSW Executive Manager of system operations Adrian Langdon said.

“Environmental water releases in the Gwydir Valley and Border Rivers are flowing down to the Barwon River system to help native fish during an important breeding period.

“Together with natural flows, water has now reached Collarenebri and Walgett, and will reach as far as Bourke in mid-January.”

Regional storages experienced small increases over the previous week;

Copeton dam (+3.6%) – currently at 17.6% of total storage.

Glenbawn dam (+0.3%) – currently 48.1% of total storage.

Glennies Creek dam (+1.2%) – currently 41.1% of full storage.

Keepit dam (+6%) – currently at 38.9% of full storage.

Lostock dam (+2.1%) – full.

Oberon dam (+0.2%) – currently at 32.5% of full storage.

Split Rock dam (+3.5%) – currently at 10.5% of full storage.

Toonumbar dam (+1.9%) – full.

While metropolitan Sydney has experienced on-going rain over the previous week, Sydney’s water supply dams have received only minor inflows with intermittent showers predicted to continue over the coming days.

“The coming rain may cause a small increase in metropolitan storages due to wet catchment conditions,” Mr Langdon said. “Warragamba Dam is currently at 97.4% of full supply capacity and rain and thunderstorms over the next two days are forecast to drop a further 10mm-30mm over the catchment. We do not expect the dam to fill.”

Controlled releases for operational and maintenance purposes are scheduled to commence this week from Warragamba dam at a rate of 3,500 ML/day, resulting in negligible downstream impacts.

Media contact- Tony Webber 0428 613 479.

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