Search USGS⌕ Search

SEARCH · Search USGS

Results for “Ground Water Report”

Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 91 records · Page 5Linked to original sources
USGS1999

Age, double porosity, and simple reaction modifications for the MOC3D ground-water transport model

This report documents modifications for the MOC3D ground-water transport model to simulate (a) ground-water age transport; (b) double-porosity exchange; and (c) simple but flexible retardation, decay, and zero-order growth reactions. These modifications are incorporated in MOC3D version 3.0. MOC3D simulates the transport of a single solute using the method-of-characteristics numerical procedure. The age of ground water, that is the time since recharge to the saturated zone, can be simulated using the transport model with an additional source term of unit strength, corresponding to the rate of aging. The output concentrations of the model are in this case the ages at all locations in the model. Double porosity generally refers to a separate immobile-water phase within the aquifer that does not contribute to ground-water flow but can affect solute transport through diffusive exchange. The solute mass exchange rate between the flowing water in the aquifer and the immobile-water phase is the product of the concentration difference between the two phases and a linear exchange coefficient. Conceptually, double porosity can approximate the effects of dead-end pores in a granular porous media, or matrix diffusion in a fractured-rock aquifer. Options are provided for decay and zero-order growth reactions within the immobile-water phase. The simple reaction terms here extend the original model, which included decay and retardation. With these extensions, (a) the retardation factor can vary spatially within each model layer, (b) the decay rate coefficient can vary spatially within each model layer and can be different for the dissolved and sorbed phases, and (c) a zero-order growth reaction is added that can vary spatially and can be different in the dissolved and sorbed phases. The decay and growth reaction terms also can change in time to account for changing geochemical conditions during transport. The report includes a description of the theoretical basis of the model, a detailed description of input requirements and output options, and the results of model testing and evaluation. The model tests illustrate use of these modifications and demonstrate that accurate solutions can be obtained for these simple cases. Two test cases have no dispersion, illustrating the suitability of this method-of-characteristics model for simulation of advection-dominated transport in ground water.

Water-Resources Investigations Report↗
USGS2004

Water Resources Data, Virginia, Water, Year 2003 Volume 2. Ground-Water-Level and Ground-Water-Quality Records

Water-resources data for the 2003 water year for Virginia consist of records of water levels and water qualityof ground-water wells. This report (Volume 2. Ground-Water-Level and Ground-Water-Quality Records) contains water levels at 354 observation wells and water quality at 64 wells. Locations of these wells are shownon figures 4 through 9. The data in this report represent that part of the National Water Data System collectedby the U.S. Geological Survey and cooperating State and Federal agencies in Virginia.

Water Data Report↗
USGS2014

Report of Committee on Ground Water, 1943–44

The Chairman extends an apology to G. W. MUSGRAVE for omission of his name from the list of members given in the report of the Committee on Ground Water for 1942–43. The response from members of the Committee in general has been very gratifying and is much appreciated. Four new members, Messrs. H. F. BLANEY, EDWARD BURWELL, Jr., A. N. SAYRE and V. T. STRINGFIELD have been added to the Committee this year, in order to effect better technical and geographic coverage.

Eos, Transactions, American Geophysical Union↗
USGS2005

Water resources data, Virginia, water year 2004 volume 2. Ground-water-level and ground-water-quality records

Water-resources data for the 2004 water year for Virginia consist of records of water levels and water quality of ground-water wells. This report (Volume 2. Ground-Water-Level and Ground-Water-Quality Records) contains water levels at 346 observation wells and water quality at 40 wells. Locations of these wells are shown on figures 4 through 9. The data in this report represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating State and Federal agencies in Virginia.

Water Data Report↗
USGS2006

Water resources data Virginia water year 2005 Volume 2. Ground-water level and ground-water quality records

Water-resources data for the 2005 water year for Virginia consist of records of water levels and water quality of ground-water wells. This report (Volume 2. Ground-Water-Level and Ground-Water-Quality Records) contains water levels at 349 observation wells and water quality at 29 wells. Locations of these wells are shown on figures 3 through 8. The data in this report represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating State and Federal agencies in Virginia.

Water Data Report↗
USGS1984

Ground-water quality in Wyoming

This report graphically summarizes ground-water quality from selected chemical-quality data for about 2,300 ground-water sites in Wyoming. Dissolved-solids, nitrate, fluoride, arsenic, barium, cadmium, chromium, lead, mercury, selenium, iron, and manganese concentrations are summarized on a statewide basis. The major chemical-quality problem that limits the use of Wyoming ground-water is excessive dissolved-solids concentrations. The aquifers with the best quality water, based on the lowest median dissolved-solids concentration of water in aquifers with 20 or more sampled sites, are Holocene lacustrine deposits, the upper Testiary Ogallala Formation and Arikaree Formation, and the Mississippian Madison Limestone. The counties with the best quality water, based on the lowest median dissolved-solids concentrations are Teton County and Laramie County. Hot Springs County and Natrona County have the highest median dissolved-solids concentrations. About 3 percent of the nitrate concentrations of ground-water samples exceeded the national primary drinking-water standard of 10 milligrams per liter. Fluoride concentrations exceeded the national primary drinking-water standard in 14 percent of the ground-water samples. Except for selenium, toxic trace elements generally have not been found in concentrations in excess of the drinking-water standards. About 19 percent of the iron and about 30 percent of the manganese concentrations in ground-water samples exceeded the national secondary drinking-water standards. (USGS)

Water-Resources Investigations Report↗
USGS1954

Progress report on selected ground-water basins in Utah

This technical publication consists essentially of the interpretation of data collected in connection with a detailed inventory of ground-water pumpage and water-level trends in four irrigation districts in southern Utah. Much of this information was assembled in a preliminary report entitled "Inventory of ground-water pumpage in three irrigation districts in southern Utah," by H. A. Waite and others, and was used by the State Engineer in a court hearing in Parowan in February 1954.

Utah↗
USGS1979

Documentation of a finite-element two-layer model for simulation of ground-water flow

This report documents a finite-element model for simulation of ground- water flow in a two-aquifer system where the two aquifers are coupled by a leakage term that represents flow through a confining layer separating the two aquifers. The model was developed by Timothy J. Durbin (U.S. Geological Survey) for use in ground-water investigations in southern California. The documentation assumes that the reader is familiar with the physics of ground-water flow, numerical methods of solving partial-differential equations, and the FORTRAN IV computer language. It was prepared as part of the investigations made by the U.S. Geological Survey in cooperation with the San Bernardino Valley Municipal Water District.

Water-Resources Investigations Report↗
USGS1984

Maps showing ground-water levels, springs, and depth to ground water, Basin and Range Province, Texas

This report on ground-water levels, springs, and depth to ground water in the Basin and Range province of Texas (see index map) was prepared as part of a program of the U.S. Geological Survey to identify prospective regions for further study relative to isolation of high-level nuclear waste (Bedinger, Sargent, and Reed, 1984), utilizing program guidelines defined in Sargent and Bedinger (1984). Also included in this report are selected references on pertinent geologic and hydrologic studies of the region. Other map reports in this series contain detailed data on ground-water quality, surface distribution of selected rock types, tectonic conditions, areal geophysics, Pleistocene lakes and marshes, and mineral and energy resources.

Texas↗
USGS2000

Water resources data, Maryland and Delaware, water year 1999, volume 2. ground-water data

Water resources data for the 1999 water year for Maryland and Delaware consist of records of water levels and water quality of ground-water wells. This report (Volume 2. Ground-Water Data) contains water levels at 395 observation wells, discharge records for 6 springs and water quality at 1 spring, 186 wells, and 27 streambed piezometers. Locations of ground-water level wells are shown on figures 5 and 6. Locations of ground-water-quality sites are shown on figure 7. The data in this report represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating State, local, and Federal agencies in Maryland and Delaware.

Water Data Report↗
USGS2001

Water resources data Maryland, Delaware, and Washington, D.C., water year 2000, volume 2. ground-water data

Water resources data for the 2000 water year for Maryland and Delaware consist of records of water levels and water quality of ground-water wells. This report (Volume 2. Ground-Water Data) contains water levels at 347 observation wells, discharge records for 5 springs, and water quality at 225 wells, 13 piezometers, and 4 springs. Locations of ground-water level wells are shown on figures 5 and 6. Locations of ground-water-quality sites are shown on figure 7. The data in this report represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating State, local, and Federal agencies in Maryland and Delaware.

Water Data Report↗
USGS1999

Water resources data, Maryland, Delaware, and Washington, D.C., water year 1998, volume 2. ground-water data

Water resources data for the 1998 water year for Maryland and Delaware consist of records of water levels and water quality of ground-water wells. This report (Volume 2. Ground-Water Data) contains water levels at 393 observation wells, discharge records for 6 springs and water quality at 290 wells and 23 streambed piezometers. Locations of ground-water level wells are shown on figures 5 and 6. Locations of ground-water-quality sites are shown on figure 7. The data in this report represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating State, local, and Federal agencies in Maryland and Delaware.

Water Data Report↗
USGS1984

Maps showing ground-water levels, springs, and depth to ground water, Basin and Range province, Utah

This report on ground-water levels, springs, and depth to ground water in the Basin and Range province of Utah (see index map) was prepared as part of a program of the U.S. Geological Survey to identify prospective regions for further study relative to isolation of high-level nuclear waste (Bedinger, Sargent, and Reed, 1984), utilizing program guidelines defined in Sargent and Bedinger (1984) . Also included in this report are selected references on pertinent geologic and hydrologic studies of the region. Other map reports in this series contain detailed data on ground-water quality, surface distribution of selected rock types, tectonic conditions, areal geophysics, Pleistocene lakes and marshes, and mineral and energy resources.

Utah↗
USGS1991

Water resources data, Massachusetts and Rhode Island, water year 1989

Water resources data for the 1991 water year for Maryland and Delaware consist of records of water levels and water quality of ground-water wells. This report (Volume 2. Ground-Water Data) contains water levels at 366 observation wells, discharge records for 4 springs and water quality at 276 wells. Locations of ground-water level wells are shown on figures 3 and 4. The data in this report represents that part of the National Water Data System collected by the U.S. Geological Survey and cooperating State, local, and Federal agencies in Maryland and Delaware.

Massachusetts, Rhode Island↗
USGS2007

Availability of Ground-Water Data for Idaho, Water Year 2006

Introduction The Water Resources Division of the U.S. Geological Survey, in cooperation with Federal, State, and local water agencies, collects a large amount of data each year pertaining to the ground-water resources of Idaho. These data constitute a valuable database for developing an improved understanding of the water resources of the State. Beginning with the 1985 water year and continuing through 2005, data were published in a report series entitled, 'Water Resources Data for Idaho, Ground-Water Data.' Prior to the introduction of that series, historical ground-water information was published in U.S. Geological Survey Water-Supply Papers. In 2006, the ground-water data reporting requirement was discontinued. However, data continue to be available in our databases. This fact sheet serves as an index to ground-water data for 2006.

Fact Sheet↗
USGS2002

Water resources data, Maryland and Delaware, water year 2001, volume 2. ground-water data

Water resources data for the 2001 water year for Maryland and Delaware consist of records of water levels and water quality of ground-water wells. This report (Volume 2. Ground-Water Data) contains water levels at 379 observation wells, discharge records for 5 springs, and water quality at 238 wells and 10 springs. Locations of ground-water level wells are shown on figures 5 and 6. Locations of groundwater- quality sites are shown on figure 7. The data in this report represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating State, local, and Federal agencies in Maryland and Delaware.

Water Data Report↗
USGS2003

Water resources data for Maryland, Delaware, and Washington, D.C, water year 2002, Volume 2. ground-water data

Water resources data for the 2002 water year for Maryland, Delaware, and Washington, D.C. consist of records of water levels and water quality of ground-water wells. This report (Volume 2. Ground-Water Data) contains water levels at 379 observation wells, discharge records for 4 springs, and water quality at 122 wells. Locations of ground-water level wells are shown on figures 5 and 6. Locations of groundwater- quality sites are shown on figure 7. The data in this report represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating State, local, and Federal agencies in Maryland, Delaware, and Washington, D.C.

Water Data Report↗
USGS2006

Water resources data Maryland, Delaware, and Washington, D.C., water year 2005, Volume 2. Ground-water data

Water resources data for the 2005 water year for Maryland, Delaware, and Washington, D.C. consist of records of water levels and water quality of ground-water wells. This report (Volume 2. Ground-Water Data) contains water levels at 352 observation wells, discharge records for 4 springs, and water quality at 118 wells. Locations of ground-water level wells are shown on figures 6 and 7. Locations of groundwater- quality sites are shown on figure 8. The data in this report represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating State, local, and Federal agencies in Maryland, Delaware, and Washington, D.C.

Water Data Report↗