Bureau Home » Water Information » National Water Account » 2015 Account » Ord » Water Accounting Statements » Changes in Water Assets and Water Liabilities

National Water Account 2015

Ord: Statement of Changes in Water Assets and Water Liabilities

Lake Argyle Dam, Western Australia (iStock © czardases)

The Statement of Changes in Water Assets and Water Liabilities presents the changes in water assets and water liabilities that occurred during the reporting year.

This statement is prepared on an accrual basis. The changes in water assets and water liabilities are recognised when the claim to water or the obligation to deliver it is recorded and not when the actual flow occurs. Figure W2 shows the transactions that change the water assets and water liabilities of the region, including:

  • accrual (non-physical) transactions, indicated by the glass-of-water symbols
  • actual water flows (both natural and engineered), indicated by the arrows.

 

Figure W2  Schematic diagram of changes in water assets and water liabilities for the region during the 2014–15 year
Figure W2 Changes in water assets and water liabilities for the region during the 2014–15 year

 

More detail on the changes in water assets and water liabilities for the 2014–15 year is provided in the Statement of Changes in Water Assets and Water Liabilities below.

Items in the statements are hyperlinked to the associated section of the Supporting information notes. Methods used to derive item volumes are provided in the Quantification approaches notes.

 

for the year ended 30 June 2015

 2015 ML2014 ML
Water asset increases
Surface water increases6,467,90114,958,874
Precipitation582,1881,043,170
Runoff5,834,25413,915,118
Point return: irrigation51,000
Discharge: wastewater459586
Total surface water increases6,467,90114,958,874
 
Groundwater increases9,33310,683
Inter-region inflow
Recharge: landscape9,33310,683
Total groundwater increases9,33310,683
 
Total water asset increases6,477,23414,969,557
Water liability decreases
Surface water liability decreases212,960201,449
Adjustment and forfeiture: individual users16,1309,412
Adjustment and forfeiture: urban system340302
Adjustment and forfeiture: irrigation196,490191,735
Total surface water liability decreases212,960201,449
 
Groundwater liability decreases4,9013,422
Adjustment and forfeiture: individual users3,9742,440
Adjustment and forfeiture: urban system927982
Total groundwater liability decreases4,9013,422
 
Total water liability decreases217,861204,871
Water asset decreases
Surface water decreases6,264,73710,232,824
Evaporation2,458,0541,384,330
Outflow3,806,6388,848,449
Leakage: landscape4545
Total surface water decreases6,264,73710,232,824
 
Groundwater decreases
Inter-region outflow
Discharge: landscape
Total groundwater decreases
 
Total water asset decreases6,264,73710,232,824
Water liability increases
Surface water liability increases498,187376,456
Allocation: individual users37,61237,581
Allocation: urban system775775
Allocation: irrigation459,800338,100
Total surface water liability increases498,187376,456
 
Groundwater liability increases14,20614,012
Allocation: individual users11,50611,312
Allocation: urban system2,7002,700
Total groundwater liability increases14,20614,012
 
Total water liability increases512,393390,468
Unaccounted-for difference
Unaccounted-for difference(1,015,905)(2,202,978)
Unaccounted-for difference(1,015,905)(2,202,978)
Total unaccounted-for difference(1,015,905)(2,202,978)
 
Total unaccounted-for difference(1,015,905)(2,202,978)
Change in net water assets(1,097,940)2,348,158