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 Management option 34 It is recommended that relevant agencies (eg EPA, DWLBC, Crown Lands) examine the impacts of boat ramps in more detail. It may be beneficial to only approve new applications for boat/ramps facilities if they are for public communal facilities, due to the potential cumulative risk from individual facilities. 246 Status of implementation: Not started 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 and the large numbers may have cumulative impacts. Increasing the number of restricted speed (4 knot) zones on the river and creating defined wake-boarding areas are suggestions that may help to limit the damage from boat wakes. Re-establishment of reeds, trees and native vegetation to minimise bank erosion is the best management practice to prevent erosion. The use of geotextile bags for stabilising banks is also recommended. Sand dumping to create beaches in townships, recreational sites and shack areas is in breach of the Water Quality EPP (EPA 2003c), and creates an impact on the aquatic ecosystem (smothers existing habitat) and other environmental values (eg sand can migrate to block adjoining water supply channels). Management option 35 Councils and DTEI study the erosion and turbidity impacts around high-use recreational sites in more detail and consider whether zoning would be a beneficial option. Status of implementation: Not started Management option 36 EPA and DWLBC to undertake education, then possible enforcement action (using the Water Quality EPP and River Murray Act) on members of the community and contractors who dump sand into the river Status of implementation: Not started Uncertainties in the risk assessment: Whether boat and watercraft wakes increase turbidity or erosion rates is uncertain. The extent of accidental diesel and other hydrocarbon spillage on boat ramps is also uncertain. The precise ecological impact of creation of sand beaches and general landscaping/modifying of riverbank edges is uncertain but substantial habitat destruction is likely to result.
Fuel stores River Murray and Lower Lakes catchment risk assessment for water quality: Results and management options Risk level: low Possible options: capital works, capacity building Suggested lead stakeholders: local councils, EPA, DWLBC Fuel stores and diesel motors on the edge of the river were generally rated as low risk due to the low likelihood of fuel spill; however, a large spill entering the river could have a major impact. Management option 37 Audit to be undertaken by EPA/DWLBC on all riverside fuel stores identified as a risk in this study. Following this audit, EPA to consider whether fuel stores should be bunded or converted to electric pumping systems to minimise the risk of hydrocarbon spills. Refuelling facilities (for vessels) Risk level: low Possible options: capital works, capacity building Suggested lead stakeholders: EPA, facility operators Status of implementation: Not started Vessel refuelling facilities were generally rated as low risk due to the low likelihood of an accident releasing a large volume spill. Management option 38 Auditing of vessel refuelling facilities to ensure appropriate measures in place to prevent and/or manage risks (eg bunding, spill kits) Petrol stations Status of implementation: Not started Risk level: low Possible options: monitoring Suggested lead stakeholders: EPA, petrol station owners, fuel companies Leakage of hydrocarbons from underground storage tanks at petrol stations was given a low risk. Stations of most concern are those in close proximity to the river. Concerns about old underground tanks were also raised but detailed information was lacking on specific risks. Uncertainties in the risk assessment: It has been suggested that tanks over five years in age are probably leaking to some degree; however, no monitoring data was available to confirm this assessment. 247
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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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Current and potential future option
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2 Renmark to border LAP area assessment - EPA - Sa.gov.au

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