Graphics Library >> Hydrology

Tag: Hydrology

Hydropower potential (theoretical possitibility for electricity generation)
xHydropower, generating electricity through turbines, represents a clean and renewable energy source, but not without problems. Dams and reservoirs disrupt the natural flow, and may increase siltation and evaporation, in...
20 Jul 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Major River Systems in the Arctic
The Arctic has several of the world’s largest rivers.This graphic shows the major river systems of the Arctic and their annual discharges in cubic kilometres, and the catchment area of the Arctic Ocean. The major river s...
28 Sep 2005 - by CAFF (Conservation of Arctic Flora and Fauna); see source field
Trends in continental river discharge
River flow is cyclical in nature, with alternating cycles of wet and dry years. This graphic uses bar graphs to show the average annual volumes of river runoff in cubic kilometres for each continent from 1921 to 1985. Ov...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Kara-Bogaz-Gol - restoration of previous water levels after 1992 (Turkmenistan, Caspian Sea)
Kara-Bogaz-Gol is a lowland area that forms a highly saline bay on the east side of the Caspian Sea, in Turkmenistan. In Soviet times it was decided to set up a dam to block the flow of saline water from the bay to the C...
29 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Hydropower potential (theoretical possitibility for electricity generation)
Hydropower, generating electricity through turbines, represents a clean and renewable energy source, but not without problems. Dams and reservoirs disrupt the natural flow, and may increase siltation and evaporation, in ...
20 Jul 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Natural resource - water (freshwater run-off)
Freshwater – a natural resource which has been adopted as a human right by the UN in 2002: 'the human right to water entitles everyone to sufficient; affordable; physically accessible; safe and acceptable water for perso...
12 May 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Global Carbon Storage in Soils
Arctic terrestrial ecosystems will continue to take up carbon, but warming and changes in surface hydrology will cause a far greater release of carbon.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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
Estimated Residence time of water resources
Estimated Residence time of water resources
26 Jan 2009 - by Phillipe Rekacewicz, February 2008