The Sydney Catchment Authority (SCA) was entitled to 1,825 ML carryover volume from the Fish River Water Supply Scheme (FRWSS) at the beginning of 2009–10. The carryover volume was an inter-basin claim to receive water to the reservoirs managed by the SCA.
The right to receive the carryover volume from the FRWSS was suspended in March 2010 because Oberon Reservoir (FRWSS supply reservoir) fell below 10% capacity. Consequently, no carryover volume was available at the end of 2009–10 for abstraction. The carryover volume would be available for abstraction once the supply reservoir reaches an adequate level, because the right was suspended (not forfeited).
Sydney Catchment Authority databases.
The Sydney Catchment Authority.
Carryover volume available at the beginning of a year from the FRWSS is calculated from entitlement holder’s allocation and metered supply volume for the previous two years (carryover volume is a two-year rolling average computed every six months; the carryover volume is capped at 50% of the maximum annual quantity). The metered supply volume to the SCA is based on flow measurements using a turbine helix-type flow meter.
Carryover volume is based on measured data. Estimated uncertainty based on meter accuracy is +/–2%.
Nil.
National Water Account 2010
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