Hydrogeology
Hydrogeology involves using knowledge from both hydrology (the study of water occurrence, distribution, movement, and quality) and geology (the study of the solid earth and the processes that shape and change it) to understand how water interacts with geological systems.
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Featured Article
Groundwater assessment methodology
Groundwater assessment methodology is vital for understanding the relationship of aquifer dynamics to precipitation and to the characteristics of the land surface of the Earth.... More »
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Current U.S. Flood Information
When flooding happens, USGS field crews are among the first to respond. During and after storms and floods, USGS field crews measure the streamflow and height of rivers... More »
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Featured News
Floods: The power of water
The deadly and destructive power of water High resolution (Credit: NOAA) Did you know fast moving water just above your ankles can knock you off your feet? Most... More »
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Atmospheric River Storm: ARkStorm
ARkStorm Scenario The U.S. Geological Survey's (USGS) Multi Hazards Demonstration Project (MHDP) has prepared its second full scenario, called ARkStorm. The scenario... More »
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Featured Article
Basic Groundwater Hydrology
Ground-water hydrology is the subdivision of the science of hydrology that deals with the occurrence, movement, and quality of water beneath the Earth's surface. It is... More »
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Featured Article
Molten Rock as a Source of High-Grade Energy
Iceland Volcano's Molten Rock Could Become Source of High-Grade Energy Krafla volcano gives geologists unique, unexpected opportunity to study magma Geologists... More »
Freshwater
Last Updated on 2013-04-24 at 19:23
Overview
The definition of freshwater is water containing less than 1000 milligrams per liter of dissolved solids, most often salt. The global distribution of... More »
Atmospheric science
Last Updated on 2013-04-22 at 17:45
Atmospheric science is the umbrella term for the study of the atmosphere — the blanket of air covering the Earth. It is a relatively new discipline that is concerned... More »
Hydrological Variability and Change
Last Updated on 2012-10-31 at 00:49
This article is drawn from Abrupt Climate Change A report by the U.S. Climate Change Science Program and the Subcommittee on Global Change Research, U.S. Geological... More »
Sea water
Last Updated on 2012-08-23 at 02:02
Sea Water
If there is one thing that just about everyone knows about the ocean is that it is salty. The two most common elements in sea... More »
Permafrost
Last Updated on 2012-08-21 at 22:44
A soil is considered permafrost if its temperature remains permanently below the melting point of water for at least two years. Such permafrost soil is ubiquitous in high... More »
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