USGS: Science Topics: hydrology

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Hydrology

Branch of earth science that deals with water as it occurs in the atmosphere, on the surface of the ground, and underground.

Subtopics:
Hydrodynamics (3 items)

Hydrologic maps (28 items)

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Results 1 - 10 of 410 listed alphabetically [list by similarity]

100-Year flood - It's all about chance [More info]: Explains the concept, probabilistic nature, and inherent uncertainties of the 100-year flood to those who are unfamiliar with this concept.
A Whole-System Approach to Understanding Agricultural Chemicals in the Environment [More info]: Explains the effects of the interaction of hydrologic and biological processes on agricultural chemicals in various environments.
A new tool to assess groundwater resources in the Mississippi embayment [More info]: Mathematical model of the groundwater system in this area includes 13 types of data and spans multiple aquifers over more than a century. This enables us to assess the quantity of groundwater, where and how it is being used, and how pumping affects it.
Access USGS - San Francisco Bay and Delta [More info]: Main page for accessing links for information and data on the San Francisco Bay estuary and its watershed with links to highlights, water, biology, wetlands, hazards, digital maps, geologic mapping, winds, bathymetry and overview of the Bay.
Acid Rain in Shenandoah National Park, Virginia [More info]: Explains acidity and acid rain and how it affects aquatic organisms. Describes the effect of acid rain on this national park, identifying areas that are at greater or lesser risk from acid rain.
Alabama Water Use, 2005 [More info]: Detailed information about how water is used in Alabama by type of use and geographic area.
An Overview of Historical Channel Adjustment and Selected Hydraulic Values in the Lower Sabine and Lower Brazos River Basins, Texas and Louisiana [More info]: How has the channel shape and path changed in response to reservoirs and other human disturbances affecting the streamflow?
Annual hydrologic data report of Pennsylvania [More info]: Online annual reports (since 1999) documenting hydrologic data for Pennsylvania gathered from USGS surface water and ground water data-collection networks and information on ordering paper copies of previous years.
Application of the SPARROW watershed model to describe nutrient sources and transport in the Missouri River Basin [More info]: Maps and diagrams showing how the mathematical model predicts the distribution of various pollutants within a large watershed.
Assessing Groundwater Availability in the High Plains Aquifer in Parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming [More info]: Explains concepts and methods used to determine the likely future supply of usable water in this major aquifer.

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