41.3 Runoff into storages

Supporting Information

The total volume of runoff (108,746 ML) into each surface water storage during the 2010–11 year within the Adelaide region is provided in the following table.

Runoff to Adelaide surface water storages in the 2010–11 year
Surface water storages Volume (ML)
Kangaroo Creek Reservoir 8,498
Little Para Reservoir 8,079
Millbrook Reservoir 12,705
Mount Bold Reservoir 65,751
Myponga Reservoir 4,290
South Para Reservoir 8,239
Warren Reservoir 1,184
Total 108,746

Quantification Approach

Data Source

Bureau of Meteorology.

Provided by

Bureau of Meteorology.


Runoff into storages was calculated based on a water-balance calculation using measured data collected at each major storage. The inflow into each storage is calculated using the following water-balance equation:

Inflow =  ΔS + O + E – T


            ΔS is the change in storage

            O is total outflow from the storage

            E is evaporation from the storage

            T is the volume of water transferred into the storage.

Total outflow (O) is calculated using the following equation:

            O = Sp + L + D + R


            Sp is spillage

            L is leakage

            D is volume of water diverted from the storage

            R is volume of environmental releases from the storage.

Assumptions, Limitations, Caveats and Approximations

The evaporation and precipitation data for each storage used to calculate runoff were estimated by the Bureau. The assumptions and limitations associated with these datasets also apply here.

Uncertainty Information

The uncertainty estimate was not quantified.