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 Table 2.5 Frequency of risks to recreational values, RB LAP area PA—pathogens; NU—nutrients; TU—turbidity; HY—hydrocarbons The recreational risks identified in this LAP area are summarised in Table 2.6 and discussed in more detail below for each stressor. Pathogens A large number (44) of moderate pathogen risks were identified relating to a number of different hazards. Event discharges from creeks and rivers were assessed as a moderate risk, as were Renmark urban stormwater event discharges. The actual risk could be lower as people would tend not to swim or ski during or immediately following rainfall events. High-use recreational camping areas lacking sanitation facilities (eg Lyrup area, downstream of Lock 5 and upstream of Nelwart Island) were also classed as a moderate risk with community concern expressed as to widespread human excreta at these sites following holiday periods. The Sustainable Recreation Strategy is currently prioritising recreation sites along the River Murray and Lower Lakes for rehabilitation and/or additional recreation facilities (Sustainable Recreation Project 2005). Septic tanks at Lyrup and Lock 5 road were identified as a moderate risk, as were riverfront wastewater (STEDS) infrastructure. Jane Eliza marina (approximately one kilometre upstream of the Renmark off-take) received a moderate risk ranking primarily related to greywater discharges (sinks, showers, dishwashers). Most vessels were noted to pump out effluent at the Renmark vessel waste disposal station; two or three pump out with a contracted tanker. The risk of a vessel accidentally spilling sewage at the river vessel waste disposal stations was also given a moderate risk ranking to recreational values. Other moderate sources of pathogen risk include leakage from septic tanks (Lyrup township and houses near Lock 5 bend) and infrastructure failure at a caravan park effluent/STEDS system leading to spillage of effluent. Nutrients Several (9) hazards posing a moderate nutrient risk were identified including leakage from large horticultural areas (Renmark, Paringa, Lyrup), Renmark stormwater inputs, discharges from creeks or rivers (Big Hunchee, Ral Ral, Pike River) and vessels at Jane Eliza marina. The septic systems for the dwellings on Lock 5 Road and in Lyrup were assessed as a moderate risk but there was some uncertainty to the level of nutrient (in particular nitrate) leakage from these sites. Mundic Creek and Whirlpool Corner wetland were rated as low nutrient risks, but it was noted that they are located in popular swimming areas. 38 Stressor Risk PA NU TU HY Total Low 9 40 32 43 124 Moderate 44 9 15 1 69 High 0 0 0 0 0 Very high 0 0 0 0 0 Total 53 49 47 44 193
River Murray and Lower Lakes catchment risk assessment for water quality: Results and management options Hydrocarbons Several Renmark stormwater discharges and diesel fuel stores contribute to low risks to recreational values. There is also a dry-dock area associated with the marina and a re-fuelling facility. Accidental fuel spillage on the Lyrup ferry poses a moderate risk to recreation areas in the immediate vicinity. Turbidity Event discharges from creeks or rivers and stormwater discharges were ranked as moderate turbidity risks to recreational values. However, people are unlikely to swim or ski during rainfall conditions so the risk may be mainly to aesthetic values. Wake-induced erosion of riverbanks in high-use recreation areas was a common community concern. This was assessed as a low risk but its actual impact on recreational values was difficult to quantify. 39
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2 Renmark to border LAP area assessment - EPA - Sa.gov.au

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