M.A.S.L. = Meters above sea level
The lake year is from October to September but the graphs are from January to December.
Absolute minimum level for generation = 475.45 msal
Current maximum retention level = 488.5 msal
Lowest level drawn down was in 1995 mid December - 475.9 masl
1980 - 3 gates were open on 16 February and were progressivly closed by 30 June.
1985 - earthquake - 5.6 on the Richeter Scale - 18 July
It was 19 years before flood gates were opened due to flooding in 2000. 3 gates were opened on
February 26. 2 gates were left half open 14 March. 1 gate left half open 13 May.
Final gate closed 9 June.
Greatest rise in lake level since 1980 was in February 1997 after 9 hours of rain.
The lake rose over 51 cm over the next two days.
Average depth of lake = 20 - 29 meters Deepest part = 120 meters Shoreline = 2 160 km.
Surface area when full = 5 580 sq.km. (the size of Wales). Enough water to supply Greater
London for around 300 years. Weight of water = 177,000,000,000 tons.
Mean annual evaporation = 1.5 meters (when full). This will expose 236 sq.km. of land.
Length = 190 km. Widest point = 33 km.
Cost = between £ 78 & 122 m.
Dam Wall = Built between 1955 + 1959; double curvature concrete arch. 128 meters high.
Crest length = 617 meters and width = 13 meters top:24 meters bottom.
Volume of concrete = 1 032 000 cu.m.
6 flood gates each 9 x 8.8 meters. At Max. Retn. Level, one gate will spill 1 574 cu.m/s.
Stilling pool = 78 m deep. Volume = 335 000 cu.m.
86 people killed on site.
Built by Impresit (Italy) and designed by Andre Coyne.
Transmission Towers weigh 7.5 tons each and are an average of 39 meters tall.
2 gates opened 50% 9/3/10 although all gates were opened, one at a time for testing.
3rd gate opened 50% 19/3/10
All 3 gates close on the 12th July 2010 at around 16:55hrs.
2010 was the year that Kariba North had the fire inside their power station. Cause still being investigated
Due to the unusually high lake level for Jan 2011 and because of the higher than expected rains in the
catchment, ZRA decided to open two gates to make "room" for the coming flood in a few months time.
22/1/11:- No.3 gate opened fully at 12:05hrs and No.5 gate opened fully at 12:30hrs.
between 29 and 31 Jan, the lake was still rising by at least 4cm per day.
Gate No.1 opened at 12:00hrs on 2/2/2011
The lake year is from October to September but the graphs are from January to December.
Absolute minimum level for generation = 475.45 msal
Current maximum retention level = 488.5 msal
Lowest level drawn down was in 1995 mid December - 475.9 masl
1980 - 3 gates were open on 16 February and were progressivly closed by 30 June.
1985 - earthquake - 5.6 on the Richeter Scale - 18 July
It was 19 years before flood gates were opened due to flooding in 2000. 3 gates were opened on
February 26. 2 gates were left half open 14 March. 1 gate left half open 13 May.
Final gate closed 9 June.
Greatest rise in lake level since 1980 was in February 1997 after 9 hours of rain.
The lake rose over 51 cm over the next two days.
Average depth of lake = 20 - 29 meters Deepest part = 120 meters Shoreline = 2 160 km.
Surface area when full = 5 580 sq.km. (the size of Wales). Enough water to supply Greater
London for around 300 years. Weight of water = 177,000,000,000 tons.
Mean annual evaporation = 1.5 meters (when full). This will expose 236 sq.km. of land.
Length = 190 km. Widest point = 33 km.
Cost = between £ 78 & 122 m.
Dam Wall = Built between 1955 + 1959; double curvature concrete arch. 128 meters high.
Crest length = 617 meters and width = 13 meters top:24 meters bottom.
Volume of concrete = 1 032 000 cu.m.
6 flood gates each 9 x 8.8 meters. At Max. Retn. Level, one gate will spill 1 574 cu.m/s.
Stilling pool = 78 m deep. Volume = 335 000 cu.m.
86 people killed on site.
Built by Impresit (Italy) and designed by Andre Coyne.
Transmission Towers weigh 7.5 tons each and are an average of 39 meters tall.
2 gates opened 50% 9/3/10 although all gates were opened, one at a time for testing.
3rd gate opened 50% 19/3/10
All 3 gates close on the 12th July 2010 at around 16:55hrs.
2010 was the year that Kariba North had the fire inside their power station. Cause still being investigated
Due to the unusually high lake level for Jan 2011 and because of the higher than expected rains in the
catchment, ZRA decided to open two gates to make "room" for the coming flood in a few months time.
22/1/11:- No.3 gate opened fully at 12:05hrs and No.5 gate opened fully at 12:30hrs.
between 29 and 31 Jan, the lake was still rising by at least 4cm per day.
Gate No.1 opened at 12:00hrs on 2/2/2011
If you have any questions for him, please e-mail him directly - timsilverback@gmail.com
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