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Tag: Water level

Tropical hydropower dams as greenhouse sources
Large tropical hydropower reservoirs in Latin America may have a potential adverse impact on the climatic system through releasing greenhouse gases into the atmosphere. Submerging large areas of land and tropical vegetat...
17 May 2005 - by Viktor Novikov, UNEP/GRID-Arendal
Annual flow of water to the Caspian Sea
Most of the water flowing into the sea comes from coastal rivers – currently supplying 300 to 310 cubic km a year. The Volga alone accounts for 80% of inflow. But it has dropped substantially during the 20th century, dec...
29 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Kara-Bogaz-Gol - restoration of previous water levels after 1992 (Turkmenistan, Caspian Sea)
Kara-Bogaz-Gol is a lowland area that forms a highly saline bay on the east side of the Caspian Sea, in Turkmenistan. In Soviet times it was decided to set up a dam to block the flow of saline water from the bay to the C...
29 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Kara-Bogaz-Gol - water level variation over time
Comparing a series of satellite images from different periods a Californian hydrologist discovered in 1983 that a huge white spot had taken the place of the vast Kara-Bogaz- Gol (literally “dark gullet” in Turkmen) in th...
07 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Example of enhanced water levels produced from river ice, Liard River, Canada
The lower curve shows the correspondence between river flow and water levels under open-water conditions. The much greater maximum water levels possible under ice-jam conditions are illustrated by the upper curve. The t...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal