Melbourne

Reconciliations

This table shows the reconciliation of the net change in water storage to the change in net water assets.

Volume (ML)
CHANGE IN NET WATER ASSETS adjustments for: Increase / (decrease) in:	144,125
7 Non-physical Water Asset
7.1 Interbasin claim on water – remaining	67,366
TOTAL 7 Non-physical Water Asset	67,366
8 Surface Water Liability
8.1.2.2 Allocation on regulated flows remaining – high security, individual irrigator holder	937
8.1.7 Allocation on regulated flows remaining – environment WAE	287
8.1.9.6 Allocation on regulated flows remaining – environmental purpose	1,325
TOTAL 8 Surface Water Liability	2,549
NET CHANGE IN WATER STORAGE	0

Change in net water asset is the difference between closing and opening net water assets for 2009–10.
Line item 7.1 Interbasin claim on water: remaining (67,366 ML) is the effective carryover volume following interbasin claims on water.
Line item 8.1.2.2 Allocation on regulated flows remaining – high-security, individual irrigator holder (937 ML) is the effective carryover volume of allocation remaining for high-reliability water shares in the Bacchus Marsh Irrigation District and Werribee Irrigation District within the Melbourne region.
Line item 8.1.7 Allocation on regulated flows remaining – environmental water access entitlement (287 ML) is the effective carryover volume in environmental water access entitlement for the Bunyip catchment.
Line item 8.1.9.6 Allocation on regulated flows remaining – environmental purpose is the effective carryover of water for environmental purpose

The following table shows the reconciliation of closing water storage to total water assets

Volume (ML)
1 Connected surface water store
1.1 Storages – entitlement system	381,507
Total 1 Connected surface water store	381,507
2 Groundwater store assets
2.1 Water table aquifer	21,873
2.2 Underlying aquifers	16,565
Total 2 Groundwater store	38,438
5 Water distribution system store
5.2 Urban wastewater system	24,709
5.3 Urban recycled water supply system	735
Total 5 Water distribution system store	25,444
TOTAL CLOSING WATER STORAGE	445,389
Plus:
7 Non-physical water asset
7.1 Interbasin claim on water – remaining	224,566
TOTAL 7 Non-physical water asset	224,566
TOTAL WATER ASSETS	669,955

Interpretation of inputs for total water assets on 30 June 2010 shown in the above table is provided below:

Line item 1.1 Storage: entitlement system (381,507 ML) is the volume of water held in storage reservoirs on 30 June 2010.
Line item 2.1 Water table aquifer (21,873 ML) is the volume of water held in water table aquifers in managed groundwater areas estimated for 30 June 2010.
Line item 2.2 Underlying aquifer (16,565 ML) is the volume of water held in underlying aquifers in managed groundwater areas estimated for 30 June 2010.
Line item 5.2 Urban wastewater system (24,709 ML) is the volume of wastewater held in storage in 30 June 2010.
Line item 5.3 Urban recycled water supply system (735 ML) is the volume of recycled water held in storage in 30 June 2010.
Non-physical water assets (224,566 ML) disclose the amount of water held by Melbourne region outside of the physical boundaries on 30 June 2010.
Of the total water assets that could be quantified, there was 669,955 ML available in the Melbourne region at 30 June 2010, an increase of 146,674 ML from 01 July 2009.

National Water Account 2010