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  • More Reading - Lakes Need Water
    Photo Gallery Latest News Letters and Submissions More Reading Maps About Us Links Act Now More Reading More information about the Lower Lakes Featured articles What the experts are saying Problems confronting the Lower Lakes and Coorong The debate Reports

    Original URL path: http://www.lakesneedwater.org/more (2016-02-09)
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  • Maps - Lakes Need Water
    the ravages of the drought Crisis map environmental hot spots around the Lower Murray Lower Lakes and Coorong Wetlands below Lock 1 map showing Lower Murray wetlands under environmental stress The barrages satellite image with overlay Other locations Bottle Bend Lagoon NSW a River Murray lagoon near Mildura that has turned acidic Peel Harvey Estuary WA a region with similarities to the Lower Lakes Murray Darling Basin KML file from

    Original URL path: http://www.lakesneedwater.org/maps (2016-02-09)
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  • About Us - Lakes Need Water
    Lower Lakes community members all volunteers who are deeply concerned about the water management of the Lower Lakes Our group has collected information from January 2009 about Lake Alexandrina Lake Albert and the Coorong so that people have a starting point for learning about the region learning about the drought and being informed to decide the future Until the Lower Lakes estuarine past is acknowledged and the affects of the

    Original URL path: http://www.lakesneedwater.org/about (2016-02-09)
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  • Links - Lakes Need Water
    the following sites Murray Darling Basin Authority MDBA The Basin Plan SA River Murray below Lock 1 Community Profile MDBA Blog for Community comments Department of Environment and Natural Resources DENR formerly Department of Environment and Heritage DEH Acid Sulfate Soil Reports Report 5 Includes seawater modelling 4MB Community Updates Community Radio Water for Good River Murray Data EPA Lower Lakes Water Quality Monitoring Murray Futures Securing the Future A Long Term Plan for the Coorong Lower Lakes and Murray Mouth Myth and the Murray The Goyder Institute Murray Darling Basin Commission MDBC Before there was the MDBA an archival site Murray River Barrages Environmental Flows MDBC 2000 The Living Murray Lower Lakes Coorong and Murray Mouth MDBC The Living Murray Foundation Report MDBC Publications MDBC The Behaviour and Future of the River Murray Mouth MDBC Walker 2002 Department of the Environment Water Heritage and the Arts EPBC EIS etc Water for the Future Guidelines for the Content of a Draft EIS Opening the Barrage Network Separating Lake Alexandrina and the Coorong Australian Bureau of Statistics Water Use on Australian Farms 2008 2009 Water Consumption Water Management and Trading CSIRO Water for a Healthy Country Flagship An Ecosystem Assessment Framework

    Original URL path: http://www.lakesneedwater.org/more/links (2016-02-09)
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  • Act Now - Lakes Need Water
    media articles A media list is here at Latest News Send letters to the editor Here is a list of newspapers Write a letter or send an email to your favourite politician Send us your letters ideas and photos info lakesneedwater org Sign up for updates on our main page and comment on our blog Pass on the website http www lakesneedwater org to like minded friends Follow lakesneedwater on

    Original URL path: http://www.lakesneedwater.org/act (2016-02-09)
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  • Lower Lake Fact Sheet - Lakes Need Water
    was about riparian rights and a rightful share of the waters of the River Murray for the growing state of South Australia it was not about the environment Did you know that during the recent drought the barrages acted as dykes water levels dropped and Lake Albert dried up exposing potential acid sulphate soils These soils are harmless as long as they remain undisturbed and waterlogged but when exposed to oxygen and then wet again sulphuric acid forms The development of acid sulphate soils can be avoided by restoring the Murray River s estuary with connectivity to the sea through the Murray mouth Did you know that the current allocation and entitlement scheme for irrigation already takes into consideration the seasonal availability of water Irrigation entitlements grant the right to extract water only when when seasonal allocations are made and this depends on water availability When water is short there are no or very limited allocations During the Millennium Drought extraction entitlements were cut by over 4 000 GL by the allocation system Buying irrigation entitlements will not put real water in the rivers and will only limit agricultural production when water is plentiful Did you know the Murray Mouth has closed before 1981 The Murray Mouth silted up the first year the barrages were built in 1941 and it is a known problem that tidal barrages cause sediment buildup The mouth was also closed in 1830 when Charles Sturt described in detail how his men were unable to manoeuver their boat from Lake Alexandrina to the Southern Ocean because they were blocked by sandbars Why is estuarine habitat so important Where fresh and salt water mix is exactly where most of the estuarine fish spawn and grow up Species like bream and mulloway all require a functioning estuary to

    Original URL path: http://www.lakesneedwater.org/home/lower-lake-fact-sheet (2016-02-09)
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  • River Murray Barrages and Lower Lakes, South Australia - Lakes Need Water
    Submissions More Reading Maps About Us Links Act Now Maps River Murray Barrages and Lower Lakes South Australia River Murray Barrages and Lower Lakes South Australia River Murray Barrages and er Lakes South Australia Barrages are labelled and shown as

    Original URL path: http://www.lakesneedwater.org/maps/river-murray-barrages-and-lower-lakes-south-australia (2016-02-09)
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  • Summary of the Lower Lakes Crisis - Lakes Need Water
    impact on wildlife Bird numbers are significantly lower much of the fringing vegetation around the former lake boundaries is now dead and the Ramsar Treaty obligations have been ignored The Coorong is in decline with hypersalinity in the southern lagoon causing drastic decreases in aquatic plants fish and bird life In this case the main cause is the south east drainage scheme which has sent fresh water out to sea rather than northwards to the Coorong Dredging the Mouth The vastly reduced area of the former estuary after the barrages were built has led to build up of sand accretions inside the mouth from the flood tide delta No outflow to the sea has meant that continuous dredging of the Murray Mouth has been necessary to keep it open and allow tidal flow to the northern end of the Coorong Lower River Murray Problems Slumping and cracking of river banks downstream of Lock 1 has resulted in warnings to evacuate over 15 riverside homes Even when water levels rise again collapse of buildings into deep water could occur without warning thus posing great danger to inhabitants Many wetlands below Lock One are at high risk of turning acidic A new weir located near Wellington or Pomanda Island would alleviate these problems for the region between Lock One Blanchetown and Wellington Returning the Lower Lakes to an Estuary This idea has been met with much opposition about its supposed deleterious effects and continues to be called last resort or a temporary measure despite the fact that tidal inundation has been successful in remediation of acid sulphate soils in other Australian states There has been no evidence published in the public realm to support claims made by government consultants and public servants as to why this proposal could not work The main objections could be overcome with engineering solutions They are as follows Use of the Tides The development of hypersalinity would not occur with adequate circulation and replenishment of seawater in the lakes The present low tidal signal at the barrages would be greatly increased up to that of the open ocean 1 5m spring tides if the sand accretions inside the mouth caused by the barrages were cleared and channels dredged Some natural scouring would occur when heads of water which have been built up and held in the Lakes after high spring tides are allowed to flow out at low tide Sediment cleared by dredging would need to be disposed of carefully where it can be treated with limestone since it would be highly sulphidic Modify Barrage Gates The barrage gates would need to be changed from their present configuration to a design which could be operated remotely and quickly to take advantage of heads of water on either side The five barrages could be operated independently according to the patterns of wind induced water movement seiching within the Lakes to allow water in or out The change from the previous artificial fresh water system is only a reflection

    Original URL path: http://www.lakesneedwater.org/feature/lower-lakes-crisis-summary (2016-02-09)
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