Sydney
Water resources and systems

Introduction

The following set of notes provides consolidated reports for each of the water stores and systems within the Sydney region during the 2013–14 year. Information on all water flows to and from each water store and system are presented in this note, including between-store flows and transfers that are not presented in the consolidated water accounting statements (which are shown in italics). For more information about the region, please refer to the General description section of the 'Contextual information'. For more information on between-store flows and transfers that occur in the region, please refer to the Supporting information note. 

 

Surface water

 
Table 1  Statement of Water Assets and Water Liabilities as at 30 June 2014 for the surface water store
Water asset

2014
(ML)

2013
(ML)

Surface water  
Storages2,386,167
2,813,222
Unregulated river1,903
25,162
Regulated river––
Lakes and wetlands––
Inter-region claim on water2,3672,367
Total surface water assets2,390,4372,840,751
   
Water liabilities  
Surface water liability  
Surface water allocation remaining0 0
Surface water allocation remaining - urban water system0 0
Other surface water liability0 0
Total surface water liabilities0 0
   
Opening net water assets2,840,751
2,782,889
Change in net water assets(450,314)
57,862
Closing net water assets2,390,437
2,840,751

 
Table 2  Statement of Changes in Water Assets and Water Liabilities for the year ended 30 June 2014 for the surface water store
Water asset increases2014
(ML)		2013
(ML)
Surface water increases  
Precipitation on surface water91,668134,391
Runoff to surface water 1,986,9284,968,033
Discharge from urban water system 59,67868,523
Direct discharge by user 2,4854,860
Increase of inter-region surface water claim on water 11,83411,834
Total surface water increases 2,152,5935,187,641
   
Water liability decreases  
Surface water liability decreases  
Adjustment and forfeiture of surface water allocation116,485
122,416
Adjustment and forfeiture of surface water allocation – urban water system 483,557497,873
Other surface water liability decreases 00
Total surface water liability decreases600,042
620,289
   
Water asset decreases  
Surface water decreases  
Evaporation from surface water168,947
141,766
River outflow from the region 1,724,7704,232,133
Surface water diversions – other statutory rights 32,53032,529
Decrease of inter-region surface water claim on water 4,3354,955
Total surface water decreases 1,930,5824,411,383
   
Water liability increases  
Surface water liability increases  
Surface water allocation announcements159,462
159,462
Surface water allocation announcements – urban system 1,040,5881,040,588
Other surface water liability increases 00
Total surface water liability increases 1,200,0501,200,050
   
Balancing item—surface water72,317
138,635
   
Change in net water assets (450,314)57,862

 

Table 3  Statement of Water flows for year ended 30 June 2014 for the surface water store
Water inflows

2014
(ML)

2013
(ML)

Surface water inflows  
Precipitation on surface water91,668 134,391
Runoff to surface water 1,986,9284,968,033
Discharge from urban water system 59,67868,523
Direct discharge by user 2,4854,860
Delivery of water under interregion agreement 7,4996,879
Total water inflows
 2,148,2585,182,686
   
Water outflows
  
 Surface water outflows
  
Evaporation from surface water168,947
141,766
River outflow from the region 1,724,7704,232,133
Surface water diversions – other statutory rights 32,53032,529
Surface water allocation diversion 42,97737,046
Surface water allocation diversion – urban water system 557,031542,715
Other delivery of allocated surface water 00
Total water outflows
 2,526,2554,986,189
   
Balancing item—surface water72,317138,635
   
Opening water storage
2,838,3842,780,522
Change in water storage
(450,314)57,862
Closing water storage
2,388,0702,838,384

 

Urban water system


 
Table 4  Statement of Water Assets and Water Liabilities as at 30 June 2014 for the urban water system
Water assets

2014
(ML)

2013
(ML)

Urban water system  
Urban water supply system––
Wastewater system––
Recycled water system– –
Urban inter-region claim on water356356
Urban claim on surface water00
Total urban water system assets356356
   
Opening net water assets356356
Change in net water assets00
Closing net water assets356356
 

 

 
Table 5  Statement of Changes in Water Assets and Water Liabilities for the year ended 30 June 2014 for the urban water system
Water asset increases2014
(ML)		2013
(ML)
Urban water system increases  
Wastewater collected480,243507,638
Delivery of water from outside region to urban water system 1,5801,260
Delivery of desalinated water to urban water system0
0
Stormwater ingress0
0
Increase of inter-region claim on water by urban water system1,7781,778
Increase of urban claim on surface water1,040,588 1,040,588
Total urban water system increases1,524,1891,551,264
   
Water asset decreases  
Urban water system decreases  
Evaporation from the urban water system253
350
Leakage to groundwater40,39044,899
Delivery to urban water system users509,122495,132
Discharge from urban water system to surface water 59,67868,523
Wastewater discharge outside of region 394,499402,455
Transfer of water outside of region 4,2584,468
Decrease of urban inter-region claim on water 9891,182
Decrease of urban claim on surface water 483,557497,873
Other urban water decreases 18,90930,657
Total urban water system decreases 1,511,6551,545,539
   
Balancing item—urban water system12,5345,725
   
Change in net water assets 00

 

Table 6  Statement of Water Flows for the year ended 30 June 2014 for the urban water system
Water inflows

2014
(ML)

2013
(ML)

Urban water system inflows  
Wastewater collected480,243507,638
Delivery of water from outside region to urban water system1,5801,260
Delivery of desalinated water to urban water system00
Stormwater ingress00
Delivery of water to urban water system under inter-region agreement789596
Entitled diversion of allocated surface water to urban water system557,031542,715
Total urban water system inflows1,039,6431,052,209
   
Water outflows  
Urban water system outflows  
Evaporation from the urban water system253
350
Leakage to groundwater40,390
44,899
Delivery to urban water system users509,122495,132
Discharge from urban water system to surface water59,67868,523
Wastewater discharge outside of region394,499402,455
Transfer of water outside of region4,258
4,468
Other urban water decreases18,909
30,657
Total urban water system outflows1,027,1091,046,484
   
Balancing item—urban water system12,5345,725
   
Opening water storage0 0
Change in water storage0 0
Closing water storage0 0