41.3 Runoff into storages
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.
|Surface water storages||Volume (ML)
|Kangaroo Creek Reservoir||8,498|
|Little Para Reservoir||8,079|
|Mount Bold Reservoir||65,751|
|South Para Reservoir||8,239|
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.