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Focus: Impacts of Humans and Their Economy on the...
Last Updated on 2009-02-27 at 21:47
The National Science Foundation (NSF) has issued a Dear Colleague Letter to the scientific community ". . . encouraging increased research . . . on the links among environment,... More »
Forest harvest and water yield
Last Updated on 2008-12-01 at 07:12
The Hubbard Brook watershed in NH, USA. Photo: http://www.hubbardbrook.org
Forest harvesting, or other reductions to vegetative cover, generally increases the average... More »
Society and water resources
Last Updated on 2008-09-17 at 16:14
Water is central to survival—without it, plant and animal life would be impossible. Water is a central component of Earth’s ecosystems, providing important controls on the... More »
Surface runoff of water
Last Updated on 2008-09-17 at 16:13
If the amount of water falling on the ground is greater than the infiltration rate of the surface, runoff or overland flow will occur. Runoff specifically refers to the water... More »
Last Updated on 2008-09-17 at 16:11
Figure 1: Relative proportions of dissolved salts in seawater. (Source: PhysicalGeography.net)
Seawater is a mixture of various salts and water. Most... More »
Global distribution of precipitation
Last Updated on 2008-09-17 at 16:06
Figure 1: Mean annual global precipitation 1980-2004. (Source: GPCC - Visualizer).
The Global Precipitation Climatology Project (GPCP) was established by the World... More »