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Water poverty index, by country in 2002
Freshwater, as a natural resource, represents a fundamental key to sustainable livelihoods - for health, economy and development. The water poverty index (WPI) is an aggregate index, describing the lack of freshwater. Th...
28 Sep 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Global International Waters Assessment (GIWA) case studies
The Global International Waters Assessment (GIWA) is an example of a comprehensive strategic assessment designed to identify priorities for remedial and mitigatory actions in international waters. This graphic shows GIWA...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Global International Waters Assessment Tools
Global International Waters Assessment's (GIWA) assessment tools for monitoring the world's water resources, incorporating five major environmental concerns and application of the DPSIR framework (driving forces-pressure...
17 May 2005 - by UNEP/GRID-Arendal
Global capture fisheries and aquaculture production, 1950-1999
The global fisheries catch has levelled off, reflecting a growing decline in most major fishing areas. This graphic shows the amount of global aquaculture production and of global capture fishery catches in millions of t...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Water withdrawal and consumption
Freshwater use is partly based on several socio-economic development factors, including population, physiography, and climatic characteristics. This graphic illustrates freshwater use, in cubic kilometres per year, from ...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Freshwater withdrawal in agriculture, industry and domestic use
The agricultural sector is by far the biggest user of freshwater, primarily for irrigation of arable land. This graphic shows the relative percentages of water use by the agricultural, industrial and domestic sectors in ...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
World's surface water: precipitation, evaporation and runoff
The world's surface water is affected by different levels of precipitation, evaporation and runoff in different regions. This graphic illustrates the different rates at which these processes affect the major regions of t...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Renewable freshwater supplies, per river basin
Freshwater represents a crucial sort for human development, for nature and for ecosystem services. This graphic compares freshwater supplies in cubic metres per capita, per river basin in 1995 with a projection of freshw...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Fish diversity in freshwater systems
Although freshwater ecosystems such as rivers, lakes and wetlands occupy less than 2% of the Earth's total land surface, they provide a wide range of habitats for a significant proportion of the world's plant and animal ...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Urban and rural water supply and sanitation
The graphic shows the amount of water supply versus sanitation coverage between the world and developing nations in percentage. It shows statistics from 1990 and 2000, as well as comparing rural to urban.
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Freshwater availability: groundwater and river flow
This graphic shows the availability of freshwater through average river flows and groundwater recharge, in cubic metres per capita per year, at the national level in the year 2000. The graphic highlights the countries wi...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Trends in marine and freshwater populations
The Marine Species Population Index provides an assessment of the average change over time in the populations of 217 species of marine mammals, birds, reptiles, and fish. The index represents the average value of six reg...
17 May 2005 - by Delphine Digout, UNEP/GRID-Arendal
Regional trends in freshwater alkalinity
Alkalinity (as CaCO3) was analysed for all sampling stations available at the continental level. Concentrations remained reasonably steady between the two decades for Africa, Asia, South America and Australasia. Signific...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Long-term variations in river flow, by continent
River runoff is cyclical in nature, with alternating cycles of wet and dry years. Significant deviations from average values differ in duration and magnitude. For example, 1940-44, 1965-68 and 1977-79 are clearly low per...
17 May 2005 - by Delphine Digout, UNEP/GRID-Arendal
River runoff by continent, 1921-1985
River runoff represents the accumlated water, from preciptation and meltwater, that feeds into rivers that feeds into seas. The estimated annual figures in this graphic is what volume of water that ends up in the World O...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Regional trends in biochemical oxygen demand (BOD)
Biochemical oxygen demand is an indicator of the organic pollution of freshwater. Alkalinity (concentration of calcium carbonate or CaCO3) is another indicator of freshwater quality. These graphics compare the concentrat...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Water consumption - top countries
Freshwater use is partly based on several socio-economic development factors, including population, physiography, and climatic characteristics. This graphic illustrates the world's top 20 water consumers per capita, in c...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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
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