Murray–Darling Basin
17.17 Decrease of inter-region surface water claim on water

The line item applies only to the Southern Basin of the Murray–Darling Basin (MDB) region. The volumetric value for the line item for the 2012–13 year was 215,000 ML. The value represents decreases to the required annual release (RAR) by Snowy Hydro Limited (Snowy Hydro). More details about RAR are available in Line item 1.5 Inter-region claim on water. Decreases to the RAR include:

• relaxation volume reduction (due to irrigators entitlements reaching full allocations and fullness of downstream storages
• the volume reserved as directed by the New South Wales Office of Water under clause 13.2 of Snowy Water Licence to facilitate a potential inter-valley transfer  
• the allocated volume for the drought account.

The following table provides information on the decrease of claims against Snowy Hydro from 01 July 2012 – 30 June 2013 and related to the Snowy water year of 01 May 2012 – 30 April 2013.

 

Decrease of claims against Snowy Hydro for the 2012–13 year

Description	Volume (ML) for the 2012–13 year
	Tumut River (ML)	River Murray (ML)	Total (ML)
repayment of water deals	0	0	0
reduction in RAR for Snowy River deals (Mowamba)	0	0	0
Snowy Water Licence—reduction agreed between parties for the 2013–14 year	0	0	0
relaxation volume reduction (due to irrigators entitlements reaching full allocations and fullness of downstream storages)	0	262,000	262,000
reserved as directed by the New South Wales Office of Water under clause 13.2 of Snowy Water Licence to facilitate a potential inter-valley transfer	0	0	0
allocated for the drought account	0	153,000	153,000
call out of relaxation volume that occurred in previous water year	(100,000)	(100,000)	(200,000)
Decrease of claims against Snowy Hydro	(100,000)	315,000	215,000

Events that increase the claims against Snowy Hydro are shown under line item 9.15 Increase of inter-region claim on water.

New South Wales Office of Water's water accounting section; and Snowy Hydro: internal database.

Bureau of Meteorology; New South Wales Office of Water; Snowy Hydro.

• Snowy Hydro required annual release at the beginning of the Snowy water year (1 May) is based on the calculations in the Snowy Water Licence.
• Quantification method was not available for the water audit monitoring data received for this line item.

Snowy Hydro Claim: numbers were estimated at the commencement of the water year, and subject to revision and confirmation at the end of the year.

The uncertainty estimate was not quantified.