Sydney
17.6 Diversions - other statutory rights

This line item provides information on water use associated with riparian and cultural basic rights. The estimated volume for the line item is 32,555 ML for 2010–11.

Detailed breakdown of diversions under these rights is given in the following table. More details about riparian right and cultural basic right are available in Water rights, entitlements, allocations and restrictions.

Estimated water use for rivers of the Sydney region

Water source	Estimated water use for 2010–11 (ML/yr)
	Riparian right	Cultural basic right	Total
Shoalhaven River	4,840	0	4,840
Illawarra River	1,467	0	1,467
Upper Nepean and Upstream Warragamba rivers	7,676	0	7,676
Hawkesbury and Lower Nepean rivers	9,279	0	9,279
Southern Sydney rivers	4,825	0	4,825
Northern Sydney rivers	4,059	0	4,059
Kangaroo River	382	27	409
Total	32,528	27	32,555

 

The following reservoir releases were made to supplement river flows to meet the above riparian needs.

Reservoir releases to supplement river flows

Reservoir	Releasing authority	Diversion during 2010–11 (ML)
Lake Wallace	Delta Electricity	1,205
Thomson Creek Reservoir	Delta Electricity	263
Lake Burragorang (Warragamba Dam)	Sydney Catchment Authority	9,837
Wingecarribee	Sydney Catchment Authority	365
Total		11,670

 

New South Wales Government, NSW Office of Water: Water Sharing Plan for the Kangaroo River Water Source and NSW Office of Water: Draft Water Sharing Plan – Greater Metropolitan Unregulated River Water Sources.

NSW Office of Water.

The estimated annual water abstraction under riparian right for stock and domestic purposes and for cultural purposes was extracted from Draft Water Sharing Plan — Greater Metropolitan Unregulated River Water Sources and the Water Sharing Plan for the Kangaroo River Water Source.

The estimation of riparian requirements for stock and domestic purposes is based on a variety of inference techniques, professional judgement, and local knowledge on water use, stocking rates, population and property shape.

• The draft water sharing plan indicates that the estimates of basic landholder requirements may be reviewed following the public exhibition of the draft.
• No cultural basic rights are estimated to occur in areas other than Kangaroo River system.

The volume was estimated. The uncertainty in this estimate is also estimated to be +/– 30% to 50%based on professional judgment and established practice within the NSW Office of Water.

The following table compares the value at 30 June 2010 reported in this account with the corresponding value reported in the 2010 Account.

 

Comparative information from the 2010 Account for line item 17.6

2011 Account line item	2010 Account line item	Value reported in the 2010 Account (ML)	Value reported in the 2011 Account (ML)	Additional information
17.6 Diversions – other statutory rights	14.5.1 Surface water diversion – riparian right	32,555	32,555	Change in line item name and number