Nottmeier, Anna M. Pugh, Aaron L. 20250314 vector digital data Denver, CO U.S. Geological Survey https://doi.org/10.5066/P9025EEW The groundwater-level change map is constructed as a point-to-point comparison with wells measured in 2009 and 2015, screened in the Cockfield (upper Claiborne) aquifer in Arkansas. Wells measured in 2009 with no water-level measurement made in 2015 were not included in the change map construction. The 2009-2015 change map contains 31 corresponding wells. Groundwater-level differences are intended to show where water levels have risen or declined from select years, across the Cockfield (upper Claiborne) aquifer, in Arkansas. It should be noted that water levels in the Cockfield (upper Claiborne) aquifer may have declined or risen since the selected groundwater-level measurements were made. Groundwater withdrawal rates and pumping from nearby wells were not always known and could have affected the groundwater level data collected for the selected years. Groundwater-level change maps are a component of the potentiometric-surface mapping study, which is an ongoing cooperative agreement between the U.S. Geological Survey, Arkansas Department of Agriculture - Natural Resources Division, Arkansas Geological Survey, Natural Resources Conservation Services and the Union County Water Conservation Board, whose purpose is to quantify current groundwater resources, evaluate changes in these resources over time, and provide the information needed to address future human-related and environmental stresses. 20090201 20150612 ground condition Complete None planned -92.7735 -91.2012 34.1537 32.9955 ISO 19115 Topic Category geoscientificInformation USGS Thesaurus water resources groundwater groundwater flow hydrogeology groundwater level Marine Realms Information Bank (MRIB) keywords aquifer effects of groundwater extraction USGS Metadata Identifier USGS:5d8407b7e4b0c4f70d071693 Common geographic areas Arkansas USGS Groundwater Information: Principal Aquifers of the United States Mississippi embayment aquifer system Cockfield (upper Claiborne) aquifer Please see 'Distribution Info' for details. There is no guarantee concerning the accuracy of the data. Any user who modifies the data is obligated to describe the types of modifications they perform. Data have been checked to ensure the accuracy. If any errors are detected, please notify the originating office. The U.S. Geological Survey strongly recommends that careful attention be paid to the metadata file associated with these data. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer. Anna M. Nottmeier U.S. Geological Survey, Lower Mississippi-Gulf Water Science Center Hydrologist mailing and physical

Fayetteville Field Station

University of Arkansas - Genesis Technology Incubator

700 W. Research Center Blvd

Fayetteville AR 72701 501-515-4331 anottmeier@usgs.gov Arkansas Department of Agriculture-Natural Resources Division, Arkansas Geological Survey, and Natural Resources Conservation Services ArcGIS Desktop 10.5 and ArcGIS Pro 3.1.3 A groundwater-level change map was constructed using groundwater-level measurements from wells that were measured in both 2009 and 2015. Data points were plotted using ArcGIS and assigned a symbol showing a decline or a rise in groundwater-level measurements from 2009 to 2015. The dataset was checked for erroneous values and reviewed using hydrographs for a site. Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Representative and uniform data distribution is consistent with well points for 2009 and 2015. Well points were verified previously with a geographic information system and plotted using ArcGIS. Groundwater-level differences were calculated from depth-to-water measurements, in feet below land surface. The accuracy of the water-level measurements is assumed to be 0.01 ft. Cunningham, W. L. Schalk, C. W. 2011 publication U.S. Geological Survey Techniques and Methods 1–A1 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/tm/1a1/ Digital and/or Hardcopy 20150428 20150616 observed Cunningham and Schalk, 2011 Source information used in support of the development of the dataset. Environmental Systems Research Institute (ESRI) 2018 application/service Redlands, CA Environmental Systems Research Institute (ESRI) https://desktop.arcgis.com/en/ Digital and/or Hardcopy 20150428 20150616 observed ESRI, 2018 Program used to construct 2015 potentiometric-surface map and plot well points. Environmental Systems Research Institute (ESRI) 2023 application/service Redlands, CA Environmental Systems Research Institute (ESRI) https://www.esri.com/en-us/home Digital and/or Hardcopy 20150601 20150616 observed ESRI, 2023 Program used to construct 2015 potentiometric-surface rasters and plot well points. Nottmeier, Anna M. Pugh, Aaron L. 2025 vector digital data Denver, CO ScienceBase - U.S. Geological Survey https://doi.org/10.5066/P9025EEW Digital and/or Hardcopy 20150601 20150612 observed Nottmeier and Pugh, 2025 Groundwater well locations and water-level measurements used to construct the potentiometric surface. U.S. Geological Survey 2016 application/service Reston, VA U.S. Geological Survey http://dx.doi.org/10.5066/F7P55KJN Digital and/or Hardcopy 20150428 20150616 observed U.S. Geological Survey, 2016 Access to water-resources data collected in 2015 U.S. Geological Survey - Water Resources Division 1988 publication U.S. Geological Survey Circular 878-C Reston, VA U.S. Geological Survey https://doi.org/10.3133/cir878C Digital and/or Hardcopy 1988 publication date U.S. Geological Survey - Water Resources Division, 1988 The eight-character string identifying an aquifer. Codes are defined by the "Catalog of Aquifer Names and Geologic Unit Codes used by the Water Resources Division. Online aquifer code list can be accessed at https://help.waterdata.usgs.gov/aqfr_cd. The first step was to plot 2009 and 2015 Cockfield (upper Claiborne) aquifer well points located in the study area that were measured and identify well points in 2009 that corresponded with 2015 well points. 2019 The second step was to take corresponding well points for 2009 and 2015 and verify field measurements that were measured in the Cockfield (upper Claiborne) aquifer and calculate the groundwater-level differences by subtracting 2009 groundwater-level measurements, in feet below land surface from the 2015 groundwater-level measurements, in feet below land surface. 2019 Well points identified with a decline were assigned a change value of "decline" and plotted with a red down arrow and those with a rise were assigned a change value of "rise" and plotted with a blue up arrow. 2019 Vector Entity point 31 Albers Conical Equal Area 29.5 45.5 -96.0 23.0 0.0 0.0 coordinate pair 0.6096 0.6096 meters North_American_Datum_1983 GRS_1980 6378137.0 298.257222101 North American Vertical Datum of 1988 1.0 feet Attribute values Land survey datum 1.0 feet Attribute values 1d_Cockfield_wlhange.shp Attribute Table Table containing attribute information associated with the dataset. U.S. Geological Survey FID Internal feature number. ESRI 0 30 Shape Feature geometry. ESRI Coordinates defining the features. AgencyID Source agency code of the data for the site location. U.S. Geological Survey USGS U.S. Geological Survey U.S. Geological Survey SiteID U.S. Geological Survey site identification number is a 15-digit identification number assigned to identify groundwater wells in U.S. Geological Survey National Water Information System database (U.S. Geological Survey, 2016). U.S. Geological Survey 330201092211101 340715091392201 StationNM Station name created by district well-numbering system to identify groundwater wells in the U.S. Geological Survey National Water Information System database (U.S. Geological Survey, 2016). U.S. Geological Survey Station name based on township, range, section, quarter, quarter, quarter, well number. County U.S. State administrative divisions (counties) of a State, as a region with specific boundaries. United States Federal Government Name of counties where wells were completed in the Cockfield (upper Claiborne) aquifer. Aqfr_CD Eight-character string identifying a local aquifer. Codes are defined by the "Catalog of Aquifer Names and Geologic Unit Codes by the Water Resources Division" (U.S. Geological Survey - Water Resources Division, 1988). Online aquifer code list can be accessed at https://help.waterdata.usgs.gov/aqfr_cd. U.S. Geological Survey 124CCKF Cockfield Formation of Claiborne Group U.S. Geological Survey Alt_ft Altitude of land surface, in feet above North American Vertical Datum of 1988 (NAVD 88). U.S. Geological Survey 103 310 Feet Above NAVD 88 WD Well Depth U.S. Geological Survey 25 550 Feet WLM_09 Water-Level Measurement 2009 U.S. Geological Survey 3.42 127.32 Feet Below Land Surface WLM_15 Water-Level Measurement 2015 U.S. Geological Survey 3.82 125.85 Feet Below Land Surface WLDiff Water-Level Difference U.S. Geological Survey -9.49 9.48 Feet Change Change in groundwater-levels from 2009 and 2015 U.S. Geological Survey decline Decline in groundwater levels from 2009 to 2015 U.S. Geological Survey rise Rise in groundwater levels from 2009 to 2015 U.S. Geological Survey The entity and attribute information provided here describes the tabular data associated with the dataset. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the dataset. The entity and attribute information was generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information. U.S. Geological Survey - SciencBase SciencBase mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner whenever applicable. The data have been approved for release and publication by the U.S. Geological Survey (USGS). Although the data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the data are released on the condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from authorized or unauthorized use. Although the data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein. Users of the data are advised to read all metadata and associated documentation thoroughly to understand appropriate use and data limitations. Vector Digital Dataset ArcGIS 10.5 and ArcGIS Pro 3.1.3 ESRI Point Shapefile Zip file contains the point shapefile as well as the associated metadata files https://doi.org/10.5066/P9025EEW None. No fees are applicable for obtaining the dataset. This file contains data available in ESRI shapefile format. The user must have software capable of displaying the shapefile. 20250314 Anna M. Nottmeier U.S. Geological Survey, Lower Mississippi-Gulf Water Science Center Hydrologist mailing and physical

Fayetteville Field Station

University of Arkansas - Genesis Technology Incubator

700 W. Research Center Blvd

Fayetteville AR 72701 501-515-4331 anottmeier@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time