2 Renmark to border LAP area assessment - EPA - Sa.gov.au

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River Murray and Lower Lakes catchment risk assessment for water quality: Results and management options The old landfill at Narrung was given a moderate risk ranking due to its proximity to the lake but it was uncertainty whether any metals are leaching there. Low risk sources included the Narrung ferry (event discharge), and the slipway and boat building yard in Goolwa (wash-off of metal anti-fouling paints). Pesticides Moderate pesticide risks were assessed for event discharges from the Angas, Bremer, and Finniss rivers, and Currency and Tookayerta creeks. There was some uncertainty to this assessment due to a lack of monitoring data but the risk was assigned on the basis of large-scale agricultural activities in the catchments. Hydrocarbons Urban stormwater discharges presented a moderate hydrocarbon risk to water quality. As mentioned previously, the cumulative impact of stormwater discharges is worth noting, particularly around townships such as Goolwa. The Goolwa wharf catchment is of particular concern due to the high percentage of commercial activity and presence of the railway line. Low hydrocarbon risk sources included fuel stores on the edge of the lake, ferries, petrol stations, disused landfills, vessel launching areas and marinas. Car tyres are commonly used to stabilise lake banks and for boat jetty protection in the Lower Lakes. While not an immediate water quality risk, these are a poor method of bank stabilisation as they are frequently undermined and dislodged from their original location. Suitable alternatives such as geotextile bags now exist which are being successfully used in several locations on the Lower Lakes. 202
Table 7.2 Summary of risks to aquatic ecosystem environmental values, GW & CD LAP areas low=low risk, mod=moderate risk, high=high risk, v high=very high risk River Murray and Lower Lakes catchment risk assessment for water quality: Results and management options certainty value in italics follows each risk ranking GEOCODE HAZARD EVENT TYPE NU TU OR HM PE HY SA CREEK/RIVER GC058B Creek, Tea Tree Creek EVENT DISCHARGE mod 2 mod 2 mod 2 low 1 low 2 low 2 GC112A Angas River DISCHARGE mod 2 low 2 mod 2 mod 3 low 2 mod 3 GC112B Angas River EVENT DISCHARGE high 3 high 3 high 3 high 3 mod 2 low 3 GC115A Bremer River DISCHARGE mod 2 low 2 mod 2 mod 3 low 2 mod 3 GC115B Bremer River EVENT DISCHARGE high 3 high 3 high 3 high 3 mod 2 low 3 GC173A Currency Creek DISCHARGE mod 2 low 2 mod 2 mod 3 low 2 mod 3 GC173B Currency Creek EVENT DISCHARGE high 3 high 3 high 3 high 3 mod 2 low 3 GC174A Finniss River DISCHARGE mod 2 low 2 mod 2 mod 3 low 2 mod 3 GC174B Finniss River EVENT DISCHARGE high 3 high 3 high 3 high 3 mod 2 low 3 GC175B Salt Creek DISCHARGE mod 2 low 2 mod 2 low 2 low 2 low 3 GC178A Tookayerta Creek DISCHARGE mod 2 low 2 mod 2 low 3 low 2 mod 3 GC178B Tookayerta Creek EVENT DISCHARGE high 2 high 2 mod 2 low 3 mod 2 low 2 DAIRY FARM GC032B Dairy discharge, Tauwitchere EVENT DISCHARGE mod 2 low 2 mod 2 low 2 low 2 GC150L Dairy, Lake Alexandrina station LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC151L Dairy, Lake Alexandrina, Potalloch LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC152L Dairy, Lake Albert, Nindthara LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC153L Dairy, Lake Albert, Reedy point LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC155L Dairy, Lake Albert eastern shore LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC156L Dairy, Lake Albert, Punbundamong LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC157L Dairy, Lake Albert west (inland) LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC158L Dairy, Lake Albert, Narrung narrows LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC159L Dairy, Lake Albert, Rumply Point LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC160L Dairy, inland between lakes LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC161L Dairy, Lake Albert, West Kilbride LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC162L Dairy, Lake Albert, west of Belcanoe LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC164L Dairy, Lake Albert, Naldene LEAKAGE mod 2 low 2 low 2 low 2 mod 2 GC165L Dairy, Lake Albert, Springhill LEAKAGE mod 2 low 2 low 2 low 2 mod 2 203
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E N V I R O N M E N T P R O T E C T
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The River Murray and Lower Lakes ca
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6 Mannum to Wellington LAP area ass
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Table 6.5 Frequency of risk to recr
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Figure 7.2 Example of hazard to wat
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Roz Becker, Riverland Tourism Assoc
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Abbreviations 10 ADWG Australian Dr
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Executive Summary The River Murray
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River Murray and Lower Lakes catchm
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