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Region: global

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
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 ...
26 Jan 2009 - by Philippe Rekacewicz
Cereal productivity in sub-Saharan Africa under a projected Intergovernamental Panel on Climate Change (IPCC) scenario
A majority of the population in sub-Saharan African lives in rural areas, where income and employment depend almost entirely on rain-fed agriculture. This population is today at high risk. Sub-Saharan Africa already has ...
26 Jan 2009 - by Philippe Rekacewicz
The spread of cholera 1950-2004
Increasing floods in between dry periods represent ideal conditions for spreading diseases such as cholera. In Nouakchott, the capital of Mauritania located in the desert, precipitations - when they occur - are always ac...
26 Jan 2009 - by GRID-Arendal
More water evaporates from reservoirs than is consumed by humans
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...
26 Jan 2009 - by Philippe Rekacewicz)
Freshwater alkalinity: 1976-2008
Alkalinity is commonly used to indicate a water body’s capacity to buffer against acidity; that is, the ability to resist, or dampen, changes in pH. Thus, alkaline compounds in water, such as bicarbonates, carbonates, an...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique), February 2006
Water withdrawal and consumption: the big gap
Freshwater use by continents is partly based on several socio-economic development factors, including population, physiographic, and climatic characteristics. Analysis indicates that: - Annual global freshwater withdraw...
26 Jan 2009 - by Phillipe Rekacewicz, February 2008
Water storage capacity for selected countries
Cross-country water storage comparisons provide insights into one aspect of risk mitigation capacity. However, storage capacity is only one guide to the linkage between infrastructure and vulnerability. Countries such as...
26 Jan 2009 - by Philippe Rekacewicz
Public services provide cheaper water
By bringing water to people water resellers extend the coverage of piped water and provide a service with important benefits for households - but at a price. That price rises with distance from the utility, as defined by...
26 Jan 2009 - by GRID-Arendal
World fish consumption per capita and per year
World fish consumption per year and per capita.
26 Jan 2009 - by Philippe Rekacewicz
Total population: access to sanitation
The 2004 global image sadly shows that the lack of access to clean water remains a burden for the poorest countries, preventing them accelerating their development. Essentially handicapping most sub-Saharan African count...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique)
Human actions leading to coastal degradation
Physical alteration and the destruction of habitats are now considered one of the most significant threats to coastal areas. Half of the world’s wetlands, and even more of its mangrove forests, have been lost over the pa...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique), February 2006
World's surface water: evaporation and runoff
Because much of the world’s surface water is far from concentrations of human settlements, not all of it is readily usable. Some facts concerning global freshwater concentrations: - It is estimated that the freshwater ...
26 Jan 2009 - by Phillippe Rekacewicz (Le Monde diplomatique), February 2006