Sydney
17.6 Surface water diversions – other statutory rights

Supporting information

This line item provides information on water use associated with riparian and cultural basic rights. The estimated volume for the line item is 32,529 ML for 2011–12.

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 access and use.


Estimated water use for rivers of the Sydney region

Water source

Estimated water use for 2011–12 (ML/year)

Riparian right

Cultural basic right

Total

Shoalhaven River

4,855

0

4,855

Illawarra River

1,460

0

1,460

Upper Nepean and Upstream Warragamba rivers

7,665

0

7,665

Hawkesbury and Lower Nepean rivers

9,271

0

9,271

Southern Sydney rivers

4,818

0

4,818

Northern Sydney rivers

4,052

0

4,052

Kangaroo River

382

27

409

Total

32,502

27

32,529

 

Quantification approach

Data source

Provided by

New South Wales Office of Water.

Method

The estimated annual water abstraction under riparian right for stock and domestic purposes and for cultural purposes was extracted from Water Sharing Plan for the Greater Metropolitan Region 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.

Assumptions, limitations, caveats and approximations

No cultural basic rights are estimated to occur in areas other than the Kangaroo River system.

Uncertainty information

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 New South Wales Office of Water.

Comparative year

This line item corresponds to line item 17.6 Diversions–other statutory rights reported in the 2011 Account.