• USGS -

    USGS -- Groundwater Watch. Pulaski County, Arkansas. Hover mouse over site for information. Click site to open page with information and data. Map generated …

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  • USGS -

    Network wells depicted on the Piedmont and Blue Ridge Aquifer Groundwater Network location map Note: Color shading in the table below indicates multiple wells that plot as a single point on the state location map above. Note: BLS = Water Level in Feet Below Land Surface, RVD = Water Level referenced to a vertical datum

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  • Decadal Change in Groundwater Quality

    Groundwater-quality data were collected from 5,000 wells between 1988-2001 (first decadal sampling event) by the U.S. Geological Survey''s National Water-Quality Assessment Project. Samples are collected in groups of 20-30 wells with similar characteristics called networks.

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  • Borehole Geophysical Logging

     · Detailed Description USGS hydrologist conducts borehole geophysical logging as part of an applied research project to evaluate the use of new hydrogeophysical tools to remotely monitor and visualize bioremediation of contaminated groundwater.

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  • Quality-Assurance Plan for Groundwater Activities,

    U.S. Geological Survey Open-File Report 2013-1151 Cover : Photograph of Greg Justin, U.S. Geological Survey, measuring water level in well at Naval …

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  • U.S. Geological Survey Fact Sheet 112-02 -

    Fractured-Rock Aquifers: Understanding an Increasingly Important Source of Water. This publication is also available in pdf format. Downlod the pdf file (3 ) [Acrobat Reader] Fractured-rock aquifers in the United States provide water for domestic use, locations for isolating hazardous and toxic waste, and sites for foundations and infrastructure.

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  • USGS -

    USGS -- Water Resources of the United States. Yavapai County, Arizona. Hover mouse over site for information. Click site to open page with information and data. Map generated 2/6/2014 6:24:31 PM. Groundwater Watch.

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  • Borehole Geophysical Monitoring of Amendment ...

    Abstract. The U.S. Geological Survey (USGS) conducted a series of geophysical investigations to monitor a field-scale biostimulation pilot project at the Anoka County Riverfront Park (ACP), downgradient from the Naval Industrial Reserve Ordnance Plant, in Fridley, Minnesota.The pilot project was undertaken by the U.S. Naval Facilities Engineering Command, Southern Division, for the purpose of ...

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  • USGS -

     · home page for usgs groundwater watch. Period of Record Monthly Statistics for 402750078452201 - CA 462 Cambria County Observation Well

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  • USGS -

    USGS: The National Map. USA Topo Maps. Click site symbol to view well information. Map generated 8/18/2019 7:32:46 PM. Groundwater Watch Help Page. Note: Color shading in the table below indicates multiple wells that plot as a single point on the state location map above. Note: BLS = Water Level in Feet Below Land Surface, AVD = Water Level in ...

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  • USGS High Plains Aquifer WLMS: Publications

    Publications. Reports for the High Plains Water-Level Monitoring Study (HPWLMS) were generated annually from 1988 to 1995 and generally every two years from 1997 to 2009 to report water-level changes in the High Plains aquifer from predevelopment to the reporting year. For 2000, a special type of USGS report, a Circular, was generated to ...

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  • Groundwater Resources Program Publication Brief

    • Water-level changes from predevelopment to 2013, by well, ranged from a rise of 85 feet to a decline of 256 feet; • Area-weighted, average water-level changes in the aquifer was a decline of 15.4 feet from predevelopment to 2013; • Area-weighted, average water-level changes in the aquifer was a decline of 2.1 foot from 2011–13;

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  • USGS VAWSC Warren County Geophysics--Borehole Logging

    USGS Water Science Centers are located in each state. Geophysical Data for Warren County, ia--Borehole logging Below are optical ( left ) and acoustic ( right ) televiewer logs for well 45V 4.

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  • USGS OGW, BG: Fact Sheet 054-00 Borehole-Radar Methods ...

     · Borehole-Radar Methods -- Tools for Characterization of Fractured Rock USGS Fact Sheet 054-00 May 2000 Prepared in cooperation with the U.S. Environmental Protection Agency, Region 5

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  • USGS Techniques and Methods 1-A1: Groundwater Technical ...

     · A series of groundwater technical procedures documents (GWPDs) has been released by the U.S. Geological Survey, Water-Resources Discipline, for general use by the public. These technical procedures were written in response to the need for standardized technical procedures of many aspects of groundwater science, including site and measuring-point establishment, measurement of …

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  • USGS High Plains Aquifer WLMS: Water-Level Data by Water ...

    High Plains Aquifer Water-Level Monitoring Study. Water-Level Data by Water Year (October 1 to September 30) This web page provides files of water-level data used for the maps of water-level changes in the High Plains aquifer for the eight states that overly the aquifer. Only static water levels are used in the maps of water-level change.

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  • Brine delineation and monitoring with electrical ...

    The potable water system at Fort Knox is threatened by brine contamination from improperly abandoned natural gas exploration wells. The Fort Knox well field is located near the town of West Point, Kentucky, in the flood plain of the Ohio River. At the site, unconsolidated sediments approximately 30 – 40 m thick, overlie shale and porous limestone.

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  • USGS OGW, BG: WRIR 99-4211

    USGS WRIR 99-4211 - Surface-geophysical investigation of the University of Connecticut landfill, Storrs, Connecticut

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  • Borehole Nuclear Magnetic Resonance (NMR)

    Multimedia. Borehole nuclear magnetic resonance (NMR) is an emerging geophysical method being applied to hydrogeology investigations. NMR is a quantitative geophysical method that can be used to make in situ assessments of porosity, water content, mobile …

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  • Borehole Geophysical Logs Now Easily Accessible ...

     · This tool releases more than 7,000 digital borehole geophysical logs at over 1,700 locations to the public—many for the first time. Users like hydrogeologists, groundwater hydrologists and geologists can search and explore the online database, which primarily includes information collected by the USGS, as well some data compiled from other sources with permission.

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  • Water-Level Changes in the High Plains Aquifer, 1980 to 1998

    In response to these declines, the U.S. Geological Survey, in cooperation with numerous Federal, State, and local water resource agencies, began a ground-water monitoring program in 1988 to assess annual water-level change in the aquifer using water-level measurements from more than 7,000 wells. Figure 1. Regional subdivisions of the High ...

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  • Borehole Geophysical Investigation of a Formerly ...

    U.S. Geological Survey Scientific Investigations Report 2009–5120 Prepared in cooperation with the U.S. Army Corps of Engineers, New England District Borehole Geophysical Investigation of a Formerly Used Defense Site, Machiasport, Maine, 2003–2006. ... [email protected]

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  • Water-Level Changes in the High Plains Aquifer, 1980 to 1996

    The average area-weighted water level in the High Plains aquifer declined 2.7 feet from 1980 to 1997 compared to a decline of 9.9 feet from predevelopment to 1980 (table 2). Assuming 1950 as the beginning of irrigation development in the High Plains region, the rate of water-level decline decreased from 0.33 foot per year (1950 to 1980) to 0.16 ...

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  • Frederick County Ground-Water

    U.S. Geological Survey 1730 East Parham Road Richmond, VA 23228 804-261-2631 804-261-2659 FAX. [email protected] • Randall C. Orndorff Geologist U.S. Geological Survey 12201 Sunrise Valley Drive Reston, VA 20192 703-648-4316 703-648-6593 FAX. [email protected]

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  • Borehole radar interferometry revisited

    Single-hole, multi-offset borehole-radar reflection (SHMOR) is an effective technique for fracture detection. However, commercial radar system limitations hinder the acquisition of multi-offset reflection data in a single borehole. Transforming cross-hole transmission mode radar data to virtual single-hole, multi-offset reflection data using a wave interferometric virtual source (WIVS ...

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  • USGS -

    Map Index: Site ID: Site Name: Most Recent Measurement: Date: Well Depth: Local Aquifer: 1 : 303004092541101: Al- 241: 35.41 BLS: 10/31/2013: 62.0 : Chicot Aquifer ...

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  • National Ground-Water Monitoring Network

    The National Ground-Water Monitoring Network (NGWMN) is a compilation of selected wells monitoring groundwater aquifers all around the nation. The NGWMN Data Portal brings groundwater data together in one place to provide users with current and reliable information for the planning, management, and development of groundwater resources.

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  • BOREHOLE GEOPHYSICAL LOG

    USGS OGW BG 2015USGS GPW3 NAD83 USGS Iowa WSC and OGW BG For each depth, the decay data are shown as total-, mobile-, capillary-, clay-, and bound- fractions of water content (where bound = clay + capillary), Sum of Echoes (SOE), and Mean Log T2 (MLT2). The T2 "free water cut-off" was 33 ms. All water content (WC)

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  • National Brackish Groundwater Assessment. Pilot ...

    Pilot Saline Studies. Three pilot studies were conducted (2010-2012) to assess saline groundwater resources at regional scales. The goals of the pilot studies were to determine the availability of data for assessing the distribution and character of saline groundwater and test and develop methodologies for assessing the resource.

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  • Groundwater Response to Earthquakes

    The USGS maintains a network of wells for monitoring various things like natural variability in water levels and response to pumping and climate change across the U.S. Comparrison of several groundwater records from well monitors arounf the United States showing their record of an Earthquake.

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  • Ground-Water Resources Program

     · Real-time monitoring well that is part of the USGS Ground-Water Climate-Response Network in Idaho (photograph by Matthew Gilbert, USGS). The Ground-Water Resources Program also supports regional evaluation of ground-water conditions where ground-water resources have been intensively developed, as in the High Plains aquifer in the central United ...

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  • USGS OGW, BG: Borehole Radar Tomography Imaging of Fluid ...

    Borehole Geophysical Logs Now Easily Accessible through ...

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  • USGS OGW, BG: Spectral Gamma Borehole Tool

     · USGS offices can learn more about the multi-echo ATV tool available from OGW BG for USGS use. USGS offices and cooperators can contact Carole Johnson (OGW BG) at cjohnson or (860) 487-7402 x17 to learn more about using the multi-echo acoustic televiewer tool or to discuss related USGS project or training needs.

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  • Development of a new semi-analytical model for ...

    Analysis of borehole flow logs is a valuable technique for identifying the presence of fractures in the subsurface and estimating properties such as fracture connectivity, transmissivity and storativity. However, such estimation requires the development of analytical and/or numerical modeling tools that are well adapted to the complexity of the problem.

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  • Principal Aquifers of the United States

    An aquifer is a geologic formation, a group of formations, or a part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to wells and springs.The areal and vertical location of major aquifers is fundamental to the determination of groundwater availability for the Nation. A principal aquifer is defined as a regionally extensive aquifer ...

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  • USGS OGW, BG: Advances in Borehole Geophysics for Ground ...

     · United States Geological Survey, Office of Ground Water, Branch of Geophysics Fact Sheet 002-98 - Advances in Borehole Geophysics for Ground-Water Investigations USGS OGW, BG: Advances in Borehole Geophysics for Ground-Water Investigations

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  • Characterization of fractures and flow zones in a ...

    The U.S. Geological Survey, in cooperation with the Connecticut Department of Energy and Environmental Protection, investigated the characteristics of the bedrock aquifer in the Tylerville section of Haddam, Connecticut, from June to August 2014. As part of this investigation, geophysical logs were collected from six water-supply wells and were analyzed to (1) identify well construction, (2 ...

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  • Sources of Dissolved Solids in Brackish Groundwater

    (Source: USGS Circular 1262) Injection, leakage, or infiltration of brine from oil and gas wells Brine is water that contains very large amounts of dissolved salts (total dissolved-solids concentration greater than 35,000 milligrams per liter), and is a byproduct of pumping oil and gas.

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  • USGS OGW BG: Integrated Borehole Geophysical Logging for ...

    OGW BG applied geophysical logging research at NAWC is focused on the acquisition of comprehensive suites of standard and advanced borehole geophysical logs. The geophysical data are entered into a database accessible by USGS personnel involved in research at the NAWC site in order to support integrated, interdisciplinary research.

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  • USGS Training on Borehole Geophysical Logging

     · Detailed Description A USGS hydrologist holds an electromagnetic induction borehole logging tool while the tool is calibrated. The hydrologist was participating in a USGS class on how to use electromagnetic induction geophysical methods for groundwater investigations, conducted by the USGS Office of Groundwater Branch of Geophysics in 2008.

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  • USGS OGW, BG: Combined Use of Borehole Geophysics and ...

    USGS Office of Ground Water, Branch of Geophysics, 11 Sherman Pl, U-5015, Storrs, Connecticut 06269, phone: 860-487-7402, fax 860-487-8802 Peter K. Joesten is a Hydrologist with the USGS OGW, BG in Storrs, Connecticut. His work focuses on acquisition, processing, and interpretation of borehole radar data. He has worked for the USGS for 9 years,

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  • MT3D-USGS version 1: A U.S. Geological Survey release of ...

    MT3D-USGS, a U.S. Geological Survey updated release of the groundwater solute transport code MT3DMS, includes new transport modeling capabilities to accommodate flow terms calculated by MODFLOW packages that were previously unsupported by MT3DMS and to provide greater flexibility in the simulation of solute transport and reactive solute transport.

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  • USGS Current Conditions for USGS 383746076482901 CH Bg 12

    WELL CHARACTERISTICS. --Drilled, observation, water-table well, depth 24.5 ft; casing diameter 4 in., top of first opening 13.5 ft, bottom of last opening 18.5 ft. DATUM. --Land surface datum is 149.69 ft above National Geodetic Vertical Datum of 1929.

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