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Our research provides scientific knowledge that engineers, planners and resource managers can use to make informed water-resources decisions. Learn more about our past and ongoing research under each of the science themes below.
Summer hydrological drought probabilities for rivers and streams in the United States are estimated 5 to 11 months in advance using maximum likelihood logistic regression and winter month streamflow data.
The Water-Monitoring-Site Mapper is an interactive map of Virginia and West Virginia water-monitoring-site locations from the USGS National Water Information System. View and download surface water, groundwater, and water quality monitoring data for active sites.
The water cycle, also known as the hydrologic cycle, describes the continuous movement of water as it makes a circuit from the oceans to the atmosphere to the Earth and on again.Most of Earth's water is in the oceans. The sun, which drives the water cycle, heats water in the oceans. Some of it evaporates as vapor into the air. Rising vapor cools and condenses into clouds. Cloud particles grow and...
About 2.1% of all of Earth's water is frozen in glaciers.97.2% is in the oceans and inland seas2.1% is in glaciers0.6% is in groundwater and soil moistureless than 1% is in the atmosphereless than 1% is in lakes and riversless than 1% is in all living plants and animals.About three-quarters of Earth's freshwater is stored in glaciers. Therefore, glacier ice is the second largest reservoir of water...
Groundwater, which is in aquifers below the surface of the Earth, is one of the Nation's most important natural resources. Groundwater is the source of about 37 percent of the water that county and city water departments supply to households and businesses (public supply). It provides drinking water for more than 90 percent of the rural population who do not get their water delivered to them from...
The International Continental Scientific Drilling Program and the U.S. Geological Survey drilled a 1,766-m-deep test hole near the center of the Chesapeake Bay impact structure in 2005 and 2006. Learn more here.