Document ID: chunk:federal_register_of_legislation:F2024C00760:reg:80:p7
Version: federal_register_of_legislation:F2024C00760
Segment Type: reg
Provision Reference: reg 80 (pt 7/9)
Character Range: 595927–599106

to be achieved for 100% of the time;
                (iv) Coorong salinity: South Lagoon average daily salinity less than 100 grams per litre for 96% of days;
                (v) Mouth openness: Mouth open to an average annual depth of 1 metres (‑1.0 m AHD) or more for at least 90% of years and 0.7 metres (‑0.7 m AHD) for 95% of years;
            (d) for all base flows and fresh requirements within each reach—no reduction in outcomes achieved in the benchmark run.
Note:   These limits of change are for the purpose of modelling SDL adjustment and do not necessarily represent environmental watering or management targets.

References

For this Schedule:

MDBA 2011, The proposed "environmentally sustainable level of take" for surface water of the Murray‑Darling Basin: Methods and outcomes, MDBA publication no: 226/11, Murray‑Darling Basin Authority, Canberra.

MDBA 2012a, Hydrologic modelling to inform the proposed Basin Plan: Methods and results, MDBA publication no: 17/12, Murray‑Darling Basin Authority, Canberra.

MDBA 2012b, Assessing environmental water requirements for the Basin's rivers, Murray‑Darling Basin Authority website, Canberra, http://www.mdba.gov.au/draft‑basin‑plan/science‑draft‑basin‑plan/assessing‑environmental‑water‑requirements.

        Schedule 6A—Calculation of SDL adjustment amounts
Note: See Schedule 2, and the definition of SDL adjustment amount in section 6.05A.

        Part 1—Preliminary

S6A.01  Simplified outline of this Schedule

      This Schedule sets out how to calculate the SDL adjustment amount of each surface water SDL resource unit for each water accounting period. The SDL adjustment amount is used to calculate the long term average sustainable diversion limit of each surface water SDL resource unit. See subsection 6.04(3), column 2 of the table in Schedule 2, and the definition of "SDL adjustment amount" in section 6.05A.
      The SDL adjustment amount is expected to vary between water accounting periods, as:
         ● water access entitlements are progressively acquired in conjunction with, or to take advantage of the water savings achieved by, notified efficiency measures and additional efficiency measures. Such acquisitions will be efficiency entitlements in different surface water SDL resource units, increasing the efficiency contributions in affected units; and
         ● additional water access rights, water delivery rights and irrigation rights are progressively acquired. Such acquisitions will be additional HEW entitlements in different surface water SDL resource units, increasing the additional HEW contributions in affected units; and
         ● the overall limitation on the size of adjustment amounts under section 7.19 operates, if applicable, in relation to a particular water accounting period.
      Section 7.19 applies if, at a particular time, the net effect of the total supply contribution, the total efficiency contribution and the total additional HEW contribution (referred to in this Schedule as the "net effect") represents an increase or a decrease of more than 5% of the total surface water SDL for the Basin water resources as it stood at the reference time. The