Jason D Payne

DC Resitivity Methodology Direct current (DC) resistivity transects were surveyed using an IRIS Syscal Pro Switch 96 instrument (IRIS Instruments, Inc., Orléans, France). Steel electrodes were hammered into the ground at a fixed distance along the profile. These were connected to the instrument using copper wires and junction boxes. The number of electrodes on each profile and their spacing is shown below: Line 1: 180 electrodes, 5 meter spacing Line 2: 48 electrodes, 2 meter spacing Line 3: 48 electrodes, 2 meter spacing Line 4: 24 electrodes, 2 meter spacing Line 5: 36 electrodes, 2 meter spacing On Line 1, the roll-along method was used to extend the line to its full extent. In this method, 48 electrodes...

Categories: Data

Geophysical Surveys at Lake Poinsett Dam, Poinsett County, Arkansas

Lake Poinsett is a 260-hectare (640 acres) lake located on Crowley’s Ridge in northeastern Arkansas, approximately 6 km southeast of Harrisburg, Arkansas within Poinsett County. The lake was built for recreation by the Arkansas Highway Department in 1960 by constructing a roughly 800-meter dam across the southern boundary of the Distress Creek watershed. The dam is currently operated by the Arkansas Game and Fish Commission (AGFC). AGFC and Arkansas Natural Resources Commission (ANRC) plan to drain the lake to allow access for a series of bank stabilization and dam safety improvements. Because none of the original blueprints exist, AGFC asked the U.S. Geological Survey (USGS) to conduct a series of differential...

Categories: Data; Tags: Arkansas, Crowley's Ridge, Electrical Resistivity, Frequency Domain Electromagnetics, GNSS Survey, All tags... Geophysical Survey, Geophysics, Hydrogeology, Lake Poinsett, Lake Poinsett State Park, Poinsett County, Self Potential, USGS Science Data Catalog (SDC), Water Resources, inlandWaters, structure, Fewer tags

Frequency Domain Electromagnetic Data - Raw Data

FDEM Methodology For this project frequency domain electromagnetic (FDEM) data were collected with a GEM-2, a broadband, multifrequency, fixed-coil electromagnetic induction unit (Geophex, 2015). Both in-phase and quadrature data were collected on 15 channels from a frequency of 810 Hz to 66,090 Hz. This system was carried along profiles that followed the axis of the dam and along tie lines that were perpendicular to the axis of the dam. Each data point was located using a backpack mounted GPS. To correct the drift of the instrument, a base station was established on the east side of the dam. Each survey started and ended with an occupation of the base station. These occupations occur as even line numbers...

Categories: Data

Water-Quality Data for Determination of Saline Groundwater in Selected Aquifers in Texas, 2021

The availability of groundwater-quality data for relatively deep wells (wells generally more than 300 feet deep) containing saline water (dissolved-solids concentrations greater than 2,000 milligrams per liter) is limited throughout the state of Texas. Water-quality samples are important for calibrating estimates of groundwater salinity derived from geophysical well logs. Water-quality data collected in 2021 from four wells completed in selected aquifers (Trinity, Carrizo-Wilcox, and Yegua-Jackson) in Texas are included in this data release.

Tags: Blanco County, Carrizo-Wilcox aquifer, Dissolved Solids, Gonzales County, Groundwater, All tags... Groundwater Levels, Major Ions, Nutrients, Saline Groundwater, Salinity, Trinity aquifer, Water Chemistry, Water Properties, Water Quality, Yegua-Jackson aquifer, Fewer tags

Waterborne Gradient Self-potential, Temperature, and Conductivity Logging of the Upper part of the Delaware River between Hancock and Port Jervis, New York, June–July 2021

This data release contains waterborne gradient self-potential (SP), surface-water temperature, surface-water conductivity and specific conductance, and surface-water nitrate concentration data measured continuously in the upper part of the Delaware River along approximately 123 kilometers (km) between Hancock and Port Jervis, New York. All of the data were measured from a kayak between June 27 and July 2, 2021. Gradient self-potential data were measured along five survey segments that varied in length between 13.1 and 31.6 km. The first segment began at Hancock, N.Y. on the east branch of the Delaware River, progressed into the main stem, and ended about 13.1 river-km downstream in Lordville, N.Y. at U.S. Geological...

Categories: Data; Tags: Barryville, New York, Callicoon, New York, Geophysical logging, Geophysics, Geophysics, All tags... Gradient self-potential, Hancock, New York, Hydrology, Hydrology, Lordville, New York, Narrowsburg, New York, New York, Port Jervis, New York, Rivers, Self-potential, Surface-water and groundwater exchanges, Surface-water conductivity, Surface-water temperature, Tusten, New York, USGS Science Data Catalog (SDC), Upper Delaware River, Upper part of the Delaware River, Water Resources, Fewer tags