Table 4

1 January 2000


Table 4: Reservoir and hydrology
Reservoir and Hydrology Dimension/Quantity Unit
Catchment Area 30,390 km2
Mean Annual Rainfall 850 mm
Mean Annual Inflow 3,750 Mm3
10 year return peak flood 1,940 m3
Maximum Normal Operating Level 1140 m
Minimum Operating Level 1096 m
Total Storage (@ EL. 1140) 9,310 Mm3
Active Storage 5,343 Mm3
Spillway Capacity (4 LLO Radial Gates @ EL. 1140) 4,416 m3/sec
Estimated Reservoir Annual Evaporation Losses 1,921 mm
Firm Annual Energy 981 GWh/yr
Average Annual Generation 1,393 GWh/yr



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