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world water collum water & energy 22.03.2014       World Water Day 2014 logo 

Facts and figures

The Facts and Figures in this section are drawn from the upcoming edition of the World Water Development Report on Water and Energy that will be published in March 2014 and launched on the occasion of World Water Day celebrations in Tokyo, Japan.




Hydroelectricity is currently the largest renewable source for power generation in the world. Hydropower’s share in total electricity generation is expected to remain around 16% through 2035.


HydrowpowerHydropower and water use

Most of the water used for hydropower generation is returned to the river though some is consumed (reservoir evaporation) and there are important impacts on timing and quality of streamflows.


wasteIndustrial water use

Roughly 75% of all industrial water withdrawals are used for energy production.


Financing waterFinancing water

For developing countries alone $103 billion per year are required to finance water, sanitation and wastewater treatment through 2015.

energy for waterEnergy for water

Energy is required for two components of water provision: pumping and treatment (before and after use).


waterborne transportationWaterborne transportation

Waterborne transit is one of the most energy efficient. Inland towing barges are more than 3 times more energy efficient than road trucks and 40% more efficient than rail.

Biogas produceBiogas produced from sewage

In Stockholm, public buses, waste collection trucks and taxis run on biogas produced from sewage treatment plants.

Access to waterAccess to water and sanitation

In 2011, 768 million people did not use an improved source of drinkingwater and 2.5 billion people did not use improved sanitation.

Access to electricityAccess to electricity

More than 1.3 billion people still lack access to electricity, and roughly 2.6 billion use solid fuels (mainly biomass) for cooking.

Wind powerWind power


Wind power is the most sustainable source of renewable energy, mainly because of its low greenhouse gas emissions and water consumption.





Current Issue: Africa Water & Sanitation & Hygiene March-April 2017 Vol.12 No.2