Water Resources

Filter Total Items: 436
Date published: March 8, 2021
Status: Completed

Columbia Plateau Regional aquifer system

The Columbia Plateau regional aquifer system (CPRAS) covers parts of Idaho, Oregon, and Washington. It consists primarily of three basalt formations separated by confining units.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 8, 2021
Status: Completed

Floridan aquifer system

The Floridan aquifer system (FAS) is one of the most productive aquifers in the world. It underlies an area of approximately 100,000 square miles beneath all of Florida and parts of southeastern Georgia, Alabama, and South Carolina.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 8, 2021
Status: Completed

Great Basin carbonate aquifer system

The rocks and deposits of the Great Basin carbonate and alluvial aquifer system (GBCAAS) are grouped into hydrogeologic units that are inferred to have reasonably distinct hydrologic properties due to their physical characteristics.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 8, 2021
Status: Completed

High Plains aquifer

The High Plains aquifer unerlies an area of about 174,000 square miles that extends through parts of eight states of the Midwest. This aquifer is the principal source of water in one of the major agricultural areas of the United States.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 8, 2021
Status: Completed

Lake Michigan Basin groundwater system

The study area for the Lake Michigan Basin groundwater-flow model encompasses the entire Michigan Structural Basin centered in the Lower Peninsula of Michigan and extending into parts of Illinois, Wisconsin, Indiana, Ohio, and Ontario, Canada.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 8, 2021
Status: Completed

Mississippi Embayment aquifer system

The Mississippi Embayment aquifer system is more than 5,000 feet thick in a wide area of south-central Louisana and southwestern Mississippi.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 8, 2021
Status: Completed

North and South Carolina Atlantic Coastal Plain aquifer system

The Atlantic Coastal Plain sediments in North and South Carolina consist of unconsolidated sand, silts, and clays along with crystalline carbonate units of Late Cretaceous, Tertiary, and Quaternary age that unconformably overlie consolidated crystalline bedrock of Paleozoic and Triassic age.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 8, 2021
Status: Completed

Pennsylvanian and Mississippian Aquifers of the Appalachian Plateaus

The Appalachian Plateaus region occupies approximately 86,000 square miles in portions of Alabama, Georgia, Kentucky, Maryland, Ohio, Pennsylvania, Tennessee, Virginia, and West Virginia. Aquifers in this region consist of alternating sequences of fractured sandstone, siltstone, shale, limestone, and coal in Permian-, Pennsylvanian-, and Mississippian-age rock formations.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 8, 2021
Status: Completed

Upper Colorado River Basin aquifer system

The Colorado River Basin (UCRB) drains parts of Wyoming, Utah, Colorado, New Mexico, Arizona, Nevada, California, and Mexico, and is divided into upper and lower basins at the compact point of Lee Ferry, Arizona. Aquifers in the UCRB are composed of permeable, moderately to well-consolidated sedimentary rocks ranging in age from Permian to Tertiary.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 8, 2021
Status: Completed

Williston and Powder River Basins aquifer systems

The Williston and Powder River Basins study combines the lithostratigraphic units of the glacial, lower Tertiary, and Upper Cretaceous aquifer systems in the United States and Canada into 7 regional hydrogeologic units-glacial deposits, 4 bedrock aquifers, and 2 bedrock confining units-using general hydraulic properties.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 7, 2021
Status: Completed

Hawaiian volcanic-rock aquifer

As part of the Hawai‛i Volcanic-Rock Aquifer Study, water-budget models were used to compute groundwater recharge and other water-budget components for four of the Hawaiian Islands: Kaua‛i, O‛ahu, Maui, and Hawai‛i Island.

Contacts: Ask USGS
Attribution: Water Resources
Date published: March 7, 2021
Status: Completed

Denver Basin aquifer system

The Denver Basin aquifer system is composed of Late Cretaceous to Tertiary-age sandstone bedrock aquifers and intervening claystone confining units that occur in the uppermost layers of the structural Denver Basin above the Cretaceous Pierre Shale confining layer.

Contacts: Ask USGS
Attribution: Water Resources