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Public Encouraged to Photograph King Tides across Georges River

Posted 20 December 2012 by (Hurstville News)

King tides are a natural part of tidal cycles that occur several times a year. King tides are not evidence of climate change but they do give us a sneak preview of what higher sea levels may look like.
The term ‘King tide’ is used to describe an especially high tide event, occurring twice a year, when there is an alignment of the gravitational pull between sun and moon. The most accessible king tide of 2013 for Botany Bay is on Saturday 12 January, 2013 at 9:30 am.
The Georges River Combined Councils’ Committee (GRCCC) is encouraging the community of the Georges River and Sydney metropolitan area to get out and photograph the king tide, and submit photographs to the Witness King Tides initiative, hosted by Green Cross Australia. Green Cross Australia develops an interactive map and visual database of king tide photographs across the country. Photos can also be submitted to GRCCC staff at info@georgesriver.org.au
Upstream river foreshores will be affected later than Botany Bay due to a tidal lag. The approximate high tides upstream are:

  • Botany Bay: 9.30am (check)
  • Dolls Point, Sans Souci: 9.45am
  • Como Bridge, Como: 10.00am
  • Lugarno/Salt Pan Creek: 10.30am
  • Milperra/Deepwater Regional Park: 11.40am
  • Chipping Norton Lakes: midday
  • Liverpool Weir: 12.15pm
    The Georges River and Sydney metropolitan coast experience a relatively small tidal range, from roughly 0.2m to 1.8m on average. King tides for the Georges River typically reach a mean high tide of 2.0m or greater. In contrast, Broadsound QLD has an 8m tide, and Derby WA has the highest tide in Australia at 11.8m.
    “While the GRCCC is specifically focussed on the restoration and collaborative management of the Georges River catchment in Sydney, we believe this project represents a good national community engagement / education initiative which will help build local (regional records) on tidal events which can be used to augment global average measurements and future tidal projections. The project will also help generate an important photographic record of the Australian Coastline,” GRCCC Chairperson, Cr Naji Peter Najjar said.
    For information on how to register photographs for Witness King Tides, go to www.georgesriver.org.au . The GRCCC is an incorporated association representing nine local government councils in the Georges River catchment working in partnership with state and federal government agencies and community representatives in our collective responsibility to protect the Georges River and its catchment. Member councils include Bankstown City, Campbelltown City, Fairfield City, Hurstville City, Kogarah City, Liverpool City, Rockdale City, Sutherland Shire, and Wollondilly Shire councils. The GRCCC is hosted by Hurstville City Council, 2009-2016.
    Media Enquiries: David Kuhn, GRCCC at 9330 6010, dkuhn@hurstville.nsw.gov.au
    ENDS