Eurobodalla Integrated Water Cycle Management Strategy

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Eurobodalla Integrated Water Cycle Management Strategy
9.6.5 Triple Bottom Line Assessment for Rosedale and Guerilla Bay
Table 9-18 Triple Bottom Line Assessment for Rosedale and Guerilla Bay
ENVIRONMENTAL
Efficient use of fresh water
resource
Minimises low flow water
extractions
Minimises greenhouse gas
emissions
Minimises pollutants being
discharged to the aquatic
environment
Minimises urban stormwater
volumes
Ensures sustainable land
use practices
Minimal
Traditional
Approach
3 4 5 6
1 0 1 0 1 2
0 0 1 0 2 2
1 1 1 2 2 2
2 2 2 1 2 2
0 0 0 0 0 2
0 1 1 1 2 2
Environmental Sum 4 4 6 4 9 12
Environmental Rank 4 4 3 4 2 1
SOCIAL
Improves security of town
water supply
Improves the quality of
drinking water
Improves urban water
service levels
Increases public awareness
of urban water issues
Minimises non-compliance
to policy and legislation
0 0 0 0 2 2
0 0 0 0 0 0
1 3 3 3 3 3
3 1 1 2 2 2
1 3 3 3 3 3
Protects public health 1 3 3 3 3 3
Social Sum 6 10 10 11 13 13
Social Rank 6 4 4 3 1 1
FINANCIAL
NPV ($m over 30 years) 2.24 3.06 2.45 1.74 3.06 3.06
Financial Rank 3 4 2 1 4 4
TBL Score 13 12 9 8 7 6
TBL Rank 6 5 4 3 2 1
According to the TBL assessment criteria, the best option is to transfer sewage to Tomakin,
with the on-site systems retained for greywater treatment or roof water harvesting as
appropriate. Although the cost of this option does not vary significantly from the other
integrated scenarios, it performs best overall against the social and environmental criteria