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Tag: Freshwater

Trends in fisheries - freshwater and marine capture fishery
The harvest of freshwater fish is likely to increase either through capture fisheries or aquaculture (otherwise known as 'fish farming'). This graphic shows inland capture fisheries trends at the national level for 1984 ...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Lake Chad - decrease in area 1963, 1973, 1987, 1997 and 2001
Straddling the borders of Nigeria, Chad, Niger and Cameroon in West Africa, Lake Chad has been a source of freshwater for irrigation projects in all these countries. This graphic traces the shrinkage of Lake Chad and cha...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Urban water supply and wastewater on a shallow aquifer
This graphic shows the changes in water supply and wastewater disposal that occur through four stages of growth of a settlement: early settlement; the town becomes a city; the city expands and the city expands further. T...
17 May 2005 - by Delphine Digout, UNEP/GRID-Arendal
Global freshwater withdrawal: agricultural, industrial and domestic Use
This graphic makes it possible to compare water use by the agricultural, industrial and domestic sectors at the national level. The graphic indicates which sectors are the dominant and significant users of water in each ...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Total global saltwater and freshwater estimates
Estimates of global water resources based on several different calculation methods have produced varied estimates. This graphic illustrates the proportions of saltwater and freshwater that make up the earth's water resou...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
The Caspian Sea drainage basin
The Caspian Sea runs north and south, extending over 1,200 km, with an average width of 320 km. It covers approximately 400,000 sq km (an area slightly larger than Germany). The population of the region is about 14 milli...
04 Oct 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Freshwater biodiversity and poverty in eastern Africa
Red areas where high percentage of children with stunted growth - used as a proxy for poverty - coincide with a high freshwater biodiversity index - a proxy for biodiversity - likely indicate areas in which poor people h...
01 Nov 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Threatened species in Eastern European countries - freshwater fish
The information on the state of biodiversity from 22 Central and Eastern European and former Soviet countries was assembled on the occasion of the 5th Conference of Parties of the Convention on Biological Diversity in Na...
10 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Potential impact of sea level rise: Nile Delta
Rising sea level would destroy weak parts of the sand belt, which is essential for the protection of lagoons and the low-lying reclaimed lands in the Nile delta of Egypt (Mediterranean Sea). The impacts would be very ser...
17 May 2005 - by Otto Simonett, UNEP/GRID-Arendal
Freshwater stress and risk
One study suggests that although global water conditions may worsen by 2025 due to population pressure, climate change could have a net positive impact on global water resources. NB! Note that other studies indicate tha...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Nigeria and the freshwater challenge
Out of the total precipitation reaching Nigeria, it can be separated into green and blue water. Green water (79% of the precipitation) represents the fraction of rainfall that generates soil moisture and which supports t...
02 Nov 2006 - by Hugo Ahlenius, UNEP/GRID-Arendal
The inlet of the bay of Kara-Bogaz-Gol before and after the construction of the dam (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
The Caspian Sea drainage basin
The Caspian Sea runs north and south, extending over 1,200 km, with an average width of 320 km. It covers approximately 400,000 sq km (an area slightly larger than Germany). The population of the region is about 14 milli...
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
Variations in sea level for the Caspian Sea (1840-2004)
The Caspian Sea has been endoreic – inwardly draining, without any outlet – since the Pliocene epoch (about 5 million years ago), prompting some specialists to treat it as the world’s largest lake. Studies of its geomorp...
07 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Water flow from the Caspian Sea to the bay of Kara-Bogaz-Gol, 1930-2000
Kara-Bogaz-Gol is a lowland area that forms a highly saline bay on the east side of the Caspian Sea, in Turkmenistan. Soviet leaders maintained that this was “a useless caldron for evaporation, an insatiable mouth swallo...
07 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Kara-Bogaz-Gol, desertification while dammed 1980-1992 (Caspian Sea, Turkmenistan)
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...
07 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Climate change vulnerability in Africa
Multiple stresses make most of Africa highly vulnerable to environmental changes, and climate change is likely to increase this vulnerability. This graphic shows which of the regions of Africa (North Africa, West Africa,...
17 May 2005 - by Delphine Digout, Revised by Hugo Ahlenius, UNEP/GRID-Arendal
Climate change vulnerability in Africa
Multiple stresses make most of Africa highly vulnerable to environmental changes, and climate change is likely to increase this vulnerability. This graphic shows which of the regions of Africa (North Africa, West Africa,...
20 Sep 2005 - by Delphine Digout, Revised by Hugo Ahlenius, UNEP/GRID-Arendal
Daugava/Zapadnaya Dvina and Nemunas/Neman river basins
Overview over the transboundary Daugava/Zapadnaya Dvina and Nemunas/Neman river basins in North Eastern Europe. These basins span the countries of Russia, Latvia, Lithuania, Belarus and Poland, and the rivers drain to th...
01 Jul 2006 - by Hugo Ahlenius, UNEP/GRID-Arendal
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