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  • Problems confronting the Coorong, Lower Lakes and Murray Mouth (CLLMM) - Lakes Need Water
    resulted in significant biodiversity loss including the once plentiful Mulloway The barrages by raising water levels in Lake Alexandrina and Lake Albert by 0 75m have also contributed to widespread soil salinisation around the Lower Lakes The threat of acid sulphate soils appears when the lake bed dries out and is exposed to oxygen This happens since the barrages keep the sea water out during low river flow conditions There

    Original URL path: http://www.lakesneedwater.org/lower-lakes-coorong-problems (2016-02-09)
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  • Ian's Corner - Lakes Need Water
    gates in the Goolwa Barrage yesterday and as a consequence we have salt water again but not as salty as last week Extra gates were also opened in Ewe and Tauwicherie and it is very salty there The extra flow through Tauwitcherie when it flows downstream has certainly helped reduce salinities in the Coorong 16 3 2012 Water levels upstream of barrages dropped to about 0 4m at low tide in the last couple of days as a result of the increased gate openings This has brought water levels here down closer to natural levels with tidal fluctuations No storm no real winds no king tides just a normal high tide but salinity at HI Bridge shot up to 40 000 EC at 6am this morning Just another example of what conditions would have been like naturally in the past 15 3 2012 Barrage openings now increased to 75 6 1 20 25 from Goolwa to Tauwitcherie giving a theoretical discharge of 32 GL d Current flow over Lock1 only 18 GL d so they are really trying this time to lower the Lake water levels and drain Lake Albert before the flows increase Already a slight hiccup due to today s storm but should only be short lived The additional opening of the Tauwitcherie Barrage from 13 to 20 to 25 gates seems to be having an immediate impact on Southern Lagoon salinities A collection of articles regarding salinity and seawater incursions in the Lower Lakes of South Australia Summary of Sea Water Intrusions into the Lower Lakes Oct 2010 to Oct 2011 Under natural pre barrage conditions sea water inflow into the Lower Lakes would have been common during low flow or even minor flood up to approx 80 GL d flow conditions Dissecting the Tides 3 October

    Original URL path: http://www.lakesneedwater.org/feature/ian-s-corner (2016-02-09)
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  • Mulloway in the Lower Lakes and Coorong - Lakes Need Water
    be 25 years old and weigh 90 lbs but currently the sizes caught today are much smaller It is essential that mulloway have access to and from their estuary And they don t use fish ladders Prior to the barrages in 1938 1939 almost 600 tons of butterfish mulloway were caught in the Lower Lakes and Coorong That is nearly twice the usual previous annual catch Reports from the period are sketchy but the fishermen were routinely pulling in several hundred tons of Mulloway each year and sending them to Adelaide and Melbourne markets There are reports of Mulloway in the Finniss River pre barrages In 1930 one ton of mulloway were caught by commercial fishermen at the mouth of the Finniss river Since the closing of the barrages in 1940 the mulloway catch has plummeted In fact the late Director of Fisheries A M Olsen writes in his 1991 report that while other fisheries may have been affected and survived the mulloway fishery was decimated by the barrages In 2008 2009 the annual commercial catch of mulloway in the Lakes and Coorong Fishery was only 30 tonnes For comparison the now freshwater Lakes commercial catch of European carp in 2008 2009 was 792 tonnes worth 863 000 Many of the Lower Lakes fishermen catch carp instead of mulloway to earn a living Freshwater flows attract mature mulloway from the sea back to the estuary A lack of freshwater flows and over fishing has been blamed for a diminished mulloway catch However when the barrages were closed in 1940 not only did they create a barrier for the mulloway the barrages effectively took away 89 of the estuarine habitat used by juveniles How much blame for the Mulloway s demise goes to a lack of freshwater flows and how much

    Original URL path: http://www.lakesneedwater.org/facts/mulloway-in-the-lower-lakes-and-coorong (2016-02-09)
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  • History of the Lower Lakes and Coorong - Lakes Need Water
    Evelyn Wallace Carter With excerpts from her book about the Lakes and the Coorong Alexandrina Library Oral History transcripts Interview with Jim Marsh Goolwa Barrage superintendent Interview with Bert Lundstrom Interview with Syd Smith Interview with W A Pretty Interview with Richard Spencer Interview with Harold Bedford Excerpts from the above interviews here Photos of the building of the Barrages in 1930 40 Link to the whole album http images

    Original URL path: http://www.lakesneedwater.org/feature/history-of-the-lower-lakes-and-coorong (2016-02-09)
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  • Lower Lakes and Goolwa Water Levels - Lakes Need Water
    Department for Water Salinity or EC drinking water 100 ppm restriction on drinking water 500 ppm limit drinking water 1000 ppm limit agriculture irrigation 2000 ppm brackish water 500 30 000 ppm sea water 30 000 50 000 ppm brine 50 000 ppm The BOM Murray Darling Water Storage Water levels for 6 April 2011 ref MDBA Weekly Reports Location Water Level AHD Notes Lake Alexandrina 0 73m Lake Albert

    Original URL path: http://www.lakesneedwater.org/facts/faq/lower-lakes-water-levels (2016-02-09)
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  • this site has content that is in violation of our Terms of service If you own the copyright to content on this site and would like it removed please see our instructions for notification of copyright infringement Why are you reporting the content on this site as inappropriate This site contains nudity This site promotes violence or is hateful This site is used for phishing This site contains malware This

    Original URL path: http://www.lakesneedwater.org/system/app/pages/reportAbuse (2016-02-09)
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  • Search results - Lakes Need Water
    an Estuary Lower Lakes Facts Vision Statement The Barrages Photo Gallery Latest News Letters and Submissions More Reading Maps About Us Links Act Now Untitled Untitled Untitled Search results No

    Original URL path: http://www.lakesneedwater.org/system/app/pages/search (2016-02-09)
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  • Facts about Estuaries - Lakes Need Water
    and sea water is an important and distinct feature of the estuary Fresh water being lighter or less dense than salt water will flow above the heavier sea water In estuaries where large amounts of freshwater are discharged a salt wedge is formed Read more The freshwater needs of Australia s estuaries are poorly understood How freshwater flows through an estuarine system influences the productivity and dispersion of salt wedges

    Original URL path: http://www.lakesneedwater.org/home/facts-about-estuaries (2016-02-09)
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