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Vital Water Graphics 2
Vital Water Graphics 2
The United Nations Environment Programme (UNEP) has been at the forefront of assessing and monitoring global water resources and presenting information on their use and management for 30 years. UNEP has compiled this report in order to provide an easily accessible resource on the state of the world's waters. The goal of this publication is ...
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Dissolved phosphate levels: concentrations at river mouths
Phosphorus is naturally present in water, primarily as inorganic and organic phosphates. Phosphates can enter aquatic environments in several ways: from the natural weathering of minerals in the drainage basin, from biol...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
Water Scarcity Index
Water overuse is damaging the environment in many major basins. High overuse tends to occur in regions heavily dependent on irrigated agriculture, such as the Indo-Gangetic Plain in south Asia, the North China Plain and ...
13 Sep 2009 - by Philippe Rekacewicz, February 2006
Water competition between cities and agriculture
It is estimated that water pollution denies close to 1.3 billion people (20% of the global population in 2000) access to clean water supplies. In 1986, WHO reported that there were 250 million new cases of waterborne dis...
26 Jan 2009 - by Philippe Rekacewicz
Sea level rise and assessment of the state of the marine environment
A significant sea level rise is one of the major anticipated consequences of climate change. This will cause some low-lying coastal areas to become completely submerged, while others will increasingly face short-lived hi...
01 Oct 2009 - by Philippe Rekacewicz
Inequity in access to clean water and sanitation
The supply of safe drinking water and the provision of sanitation are management issues that raise concerns about inequitable service provision, particularly in developing countries. Although several successful initiativ...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
Increased global water stress
According to Population Action International, based upon the UN Medium Population Projections of 1998, more than 2.8 billion people in 48 countries will face water stress, or scarcity conditions by 2025. Of these countri...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique), February 2006
Relative demographic weight for each continent
Population percentage increase by continent.
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique)
Poor and rich: inequal demographic evolution
According to the medium hypothesis of the United Nations, a projection comparing the population in developed and undeveloped countries.
26 Jan 2009 - by GRID-Arendal
Fishing yield
Three-quarters of the world’s fish stocks are currently exploited to the maximum extent, if not in excess (FAO, 2000). This exploitation has had the following impacts: - A growing variety of fishery products are being e...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
The water cycle
Environment water transport system. The water cycle consists of precipitation, vapour transport, evaporation, evapo-transpiration, infiltration, groundwater flow and runoff. Figure 1 explains the global water cycle, ill...
01 Feb 2008 - by Philippe Rekacewicz , UNEP/GRID-Arendal
Water - cooperation or conflict?
History shows that conflicts over water often emerge and give rise to political tensions, but that most disputes are resolved peacefully. However, the absence of conflict is, at best, only a partial indicator of the dept...
26 Jan 2009 - by GRID-Arendal
Freshwater use by sector at the beginning of the 2000s
The agricultural sector is by far the biggest user of freshwater. Analysis indicates that: - In the United States, agriculture accounts for some 49% of total freshwater use, with 80% of this volume being used for irriga...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique)
The disappearance of the Aral Sea
The demise of the Aral Sea in central Asia was caused primarily by the diversion of the inflowing Amu Dar’ya and Syr Dar’ya rivers to provide irrigation water for local croplands. These diversions dramatically reduced th...
26 Jan 2009 - by GRIDA
Nitrate levels: concentrations at river mouths
Nutrients are essential to life. In aquatic systems, nitrogen and phosphorus are the two nutrients that most commonly control the growth of aquatic plants, algae and bacteria. Nitrogen and phosphorus are considered to be...
26 Jan 2009 - by Philippe Rekacewicz
Tigris and Euphrates rivers fragmentation
It has been predicted that access to water will create conflict between countries. In Africa, central Asia, west Asia and the Americas, some countries are already arguing fiercely over access to rivers and inland seas, a...
26 Jan 2009 - by Philippe Rekacewicz
State of world fisheries and aquaculture
Drawing on research and statistical data since 2000, experts at the University of British Columbia in Vancouver have shown that catches reported by China are largely overestimated, concealing a substantial decline in wor...
26 Jan 2009 - by Philippe Rekacewicz
Benefits of marine and coastal ecosystems to human wellbeing
Besides the well-known economic value of fisheries, there are several other activities generating significant revenues in coastal and marine areas. Tourism has become one of the world’s fastest growing industries, provid...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
Level of river fragmentation and flow regulation
River fragmentation - The interruption of a river’s natural flow by dams, inter-basin transfers or water withdrawal - is an indicator of the degree to which rivers have been modified by man (Ward and Stanford, 1989, and ...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique), March 2006
Increasing price with volume
Rising block tariffs aim to achieve several public policy goals. A low or zero tariff applied to the first block can enhance affordability. For example, Durban, South Africa, provides 25 litres of water a day free of cha...
26 Jan 2009 - by GRID-Arendal
Water supply per river basin in 1995 and 2025
Although the absolute quantities of freshwater on earth have always remained approximately the same, the uneven distribution of water and human settlement continues to create growing problems freshwater availability and ...
26 Jan 2009 - by Philippe Rekacewicz,February 2006
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