Table A.1: Options analysis and recommended allocation limit for the Collie River sub-area Use/demands Allocation Result Risks/benefits limit option (GL/year) 68 GL licensed use Option 1 = Not applicable for irrigation + 0.5 18% of mean GL for Water annual flow Corporation + 1 GL Option 2 = Not applicable private self-supply 30% of mean annual flow Application for 17 GL Option 3 = % 85.1 Some ecological risk due to low level from Water of ecologically of confidence in annual ecological Corporation sustainable water requirement and ecologically yield sustainable yield Further self-supply + meets current licensed demand potential (Harvey Water) + meets current application demand Stock and domestic (Water Corporation and Verve Energy) Option 4 = 120.5 Very high ecological risk due to low Water quality = 100% level of confidence in annual marginal ecologically ecological water requirement and sustainable ecologically sustainable yield yield + reservoir infrastructure constraints + meets current demand and allows for growth + very low reliability and high supply risk due to reduced inflows Option 5 = > Not applicable ecologically sustainable yield Recommended 85.6 The limit covers 85.1 GL for Wellington Reservoir, 1 GL for self-supply and 0.5 GL for Mungalup Lower North Coast water sharing plan The lower north coast plan covers the Manning River, its tributaries and connected alluvial aquifers in the mid-north coast of New South Wales. The water plan has broad objectives to protect those water resources with high environmental values while meeting consumptive demand (including for irrigated agriculture, town water supplies and industry). The factors considered in developing the extraction limits and water sharing rules are not documented for all of the water resources managed under the plan. Where they are (Table 2), only environmental and economic factors are considered. The options considered in developing the management arrangements are not documented and the trade-offs between the plans’ environment and economic values are not transparent.
Table A.1: Options analysis and recommended allocation limit for the Collie River sub-area Use/demands Allocation limit option Result (GL/year) Risks/benefits 68 GL licensed use for irrigation + 0.5 GL for Water Corporation + 1 GL private self-supply Application for 17 GL from Water Corporation Further self-supply potential Stock and domestic Water quality = marginal Option 1 = 18% of mean annual flow Not applicable Option 2 = 30% of mean annual flow Not applicable Option 3 = % of ecologically sustainable yield 85.1 Some ecological risk due to low level of confidence in annual ecological water requirement and ecologically sustainable yield + meets current licensed demand (Harvey Water) + meets current application demand (Water Corporation and Verve Energy) Option 4 = 100% ecologically sustainable yield 120.5 Very high ecological risk due to low level of confidence in annual ecological water requirement and ecologically sustainable yield + reservoir infrastructure constraints + meets current demand and allows for growth + very low reliability and high supply risk due to reduced inflows Option 5 = > ecologically sustainable yield Not applicable Recommended 85.6 The limit covers 85.1 GL for Wellington Reservoir, 1 GL for self-supply and 0.5 GL for Mungalup Lower North Coast water sharing plan The lower north coast plan covers the Manning River, its tributaries and connected alluvial aquifers in the mid-north coast of New South Wales. The water plan has broad objectives to protect those water resources with high environmental values while meeting consumptive demand (including for irrigated agriculture, town water supplies and industry). The factors considered in developing the extraction limits and water sharing rules are not documented for all of the water resources managed under the plan. Where they are (Table 2), only environmental and economic factors are considered. The options considered in developing the plans’ management arrangements are not documented and the trade-offs between the environment and economic values are not transparent.
763-NB-triple-bottom-line-report.docx