Pressure data from a phreatic aquifer was collected in the summer of 2013 during Multi-frequency Oscillatory Hydraulic Tomography pumping tests. All tests were performed at the Boise Hydrogeophysical Research Site. The data will be inverted using a fast steady-periodic adjoint-based inverse code.

The USGS collected water level time series data sets using a submersible pressure transducer at FORGE WELL 58B-32 during an aquifer test from February 12 to February 16, 2024. Transmissivity of the pumped aquifer was estimated to be 37,520-55,080 square feet per day using a Theis solution for unconfined aquifers provided by AQTESOLV software. The hydraulic conductivity of the aquifer was then calculated to be 86-126 feet per day using a saturated aquifer thickness of 436 feet.

Since the 1940's, commercial, academic and government hydrologists have used aquifer tests to estimate the hydrogeologic properties of an aquifer near test wells. Results from these tests are recorded in various files, databases, reports, and scientific publications. The Lower Mississippi-Gulf (LMG)-Hydrogeologic Test dataset is an attempt to aggregate these dispersed hydrogeologic test results into a single dataset that is publicly available in a machine-readable format. The hydrogeologic values presented in the Mar2022 version of the LMG-Hydrogeologic Test Dataset were estimated by Douglas Carlson, PhD, with the Louisiana Geological Survey and Associate Professor-Research at Louisiana State University. Hydraulic conductivity estimates were made from specific capacity data using a technique developed by Bradbury and Rothschild (1985). Specific capacity values, from well pumping tests, were obtained from the Louisiana Water Well Registration Database. This Child Item contains the Mar2022 version of the LMG-Hydrogeologic Test dataset with information and results from 7527 aquifer tests. Additionally, this dataset contains 6 attribute tables (.txt files) with additional information for various fields, a zip file containing the geospatial data, a companion attribute table as a .txt file and a readme text file with definitions and descriptions of the attributes and attribute tables. The LMG-Hydrogeologic Aquifer Test dataset - Mar2022 is available in 2 formats: 1) a tab delimited text (.txt) UTF-8 file and 2) an ESRI GIS point shapefile. FIELDS INCLUDED IN THE LMG-HYDROGEOLOGIC TEST DATASET – Mar2022: [a complete list of field names, their definitions and units are listed in the Readme.txt file] Location Data: USGS site identification number, Local identification name, Public Land Survey System Number, Latitude, Longitude, State and County. Well Construction Data: Construction date, well depth, Diameter of well, Diameter of casing, Depth to top of opening (screen) interval, Depth to bottom of opening interval and Length of opening interval. Aquifer Data: Local aquifer name and code, National aquifer name and code, Top of aquifer, Bottom of aquifer, and Thickness of aquifer. Groundwater Test Data: Test date, Yield/discharge, Length of time associated with yield, Static water-level, Production water-level associated with yield, Drawdown associated with yield. Hydrogeologic Data: Specific Capacity, Transmissivity, Horizontal Conductivity, Vertical Conductivity, Permeability and Storage Coefficient. Ancillary Data: Method of Test Analysis and Data Source Reference. DESCRIPTIONS OF ATTACHED FILES: LMG_HydrogeologicTestDataset_Mar2022.txt: is a tab delimited, UTF-8 text file of the LMG-Hydrogeologic Test Dataset Mar2022. Readme.txt: is a text (.txt) file with field names, definitions and units for the LMG-Hydrogeologic Test Dataset Mar2022 and associated attribute tables. AtbtTbl_AqfrCd_Readme.txt: Is an UTF-8 text file containing information from the National Water Information System: Help System web page about USGS groundwater Codes. (accessed December 4, 2019 at https://help.waterdata.usgs.gov/codes-and-parameters) AtbtTbl_FipsGeographyCodes.txt: Is a tab delimited, UTF-8 text file of FIPS (Federal Information Processing Standards) codes, uniquely identifying states, counties and county equivalents in the United States. Note: to reduce the size of this file, City Codes were Removed. (accessed January 8, 2020 at https://www.census.gov/geographies/reference-files/2017/demo/popest/2017-fips.html). AtbtTbl_LocalAqfrCodes.txt: Is a tab delimited, UTF-8 text file of eight-character string identifying an aquifer. Codes are defined by the "Catalog of Aquifer Names and Geologic Unit Codes used by the USGS. (accessed December 4, 2019 at https://help.waterdata.usgs.gov/aqfr_cd) AtbtTbl_NatAqfrCodes.txt: Is a tab delimited, UTF-8 text file of ten-character strings identifying a National aquifer, or principal aquifer of the United States, that