Graphics Library >> global

Region: global

Global freshwater resources: quantity and distribution by region
Glaciers and icecaps contain approximately 70% of the world's freshwater, but groundwater is by far the most abundant and readily available source of freshwater. This graphic illustrates the quantity (in cubic kilometres...
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
Freshwater Stress 1995 and 2025
This graphic shows the amount of water withdrawal as a percentage of the total available supply, at the national level in 1995 and in 2025 (projected amounts). Overall, the percentages are expected to rise substantially ...
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
Groundwater: aquifers, wells and circulation
This graphic illustrates groundwater flow, two types of aquifers (confined and unconfined) and three types of wells (artesian; flowing artesian and a water table well in an unconfined aquifer). It shows how groundwater i...
17 May 2005 - by Delphine Digout, 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
Phosphate levels in major basins
A comparison of the major watersheds between the two decades showed that Northern Europe and North America had lower phosphate concentrations, while the Ganges and Brahmaputra watersheds in South Central Asia had higher ...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Sea level change: estimations and predictions
This resource includes four graphics that explain sea level change, an expected consequence of climate change. The first graphic, 'Relative Sea Level Over the Past 300 Years', shows the changes in sea level rise, in metr...
17 May 2005 - by 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
World's water cycle: schematic and residence time
The water cycle consists of precipitation, evaporation, evapotranspiration and runoff. This graphic explains the global water cycle, showing how nearly 577 000 km3 of water circulates through the cycle each year. A table...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Industrial areas and seasonal zones of oxygen-depleted waters
This graphic illustrates that there is a strong correlation between the world's industrial areas and the areas in which seasonally oxygen-depleted waters occur. The accompanying text explains some of the effects of land-...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Alkalinity in major rivers
This graphic shows the average bicarbonate concentrations, in milligrams per litre, at major river mouths for the time periods 1976 to 1990 and 1991 to 2000. The graphic also shows the changes in average bicarbonate leve...
17 May 2005 - by Philippe Rekacewicz, 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
Trends in water consumption and evaporation
Throughout the 20th century, global water use has increased in the agricultural, domestic and industrial sectors. Evaporation from reservoirs has increased at a slower rate. Projections indicate that both global water us...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Coastlines under threat
Out of the coastlines of the world, the coasts in Europe, Asia and Africa are of highest concern, and where extra care needs to be taken to ensure that measures are taken to protect the coasts in all aspects (erosion, bi...
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