Bill Eldridge
Hydrologist for the Dakota Water Science Center
Bill Eldridge is a hydrologist at the Dakota Water Science Center. He received a Bachelor and Master degrees in Geological Engineering from the South Dakota School of Mines and Technology. He also has a Bachelor degree in Chemistry from the U.S. Air Force Academy. Since joining the USGS in 2013, Bill studies Black Hills hydrology and groundwater modeling.
Science and Products
Datasets Used to Create Maps of Pierre Shale Elevation and Surficial Deposit Thickness within and near Ellsworth Air Force Base, South Dakota, 2021 Datasets Used to Create Maps of Pierre Shale Elevation and Surficial Deposit Thickness within and near Ellsworth Air Force Base, South Dakota, 2021
This data release contains borehole geophysical data collected within and near Ellsworth Air Force Base, South Dakota, from September 2020 to August 2021. The data accompanies a USGS scientific investigations map from Medler and others (2022). The U.S. Geological Survey, in cooperation with the U.S. Air Force Civil Engineer Center, collected borehole geophysical data and performed simple...
Borehole Video and Aquifer Test Data for the Burnpit Well, Mount Rushmore National Memorial, South Dakota, 2020 Borehole Video and Aquifer Test Data for the Burnpit Well, Mount Rushmore National Memorial, South Dakota, 2020
This data release contains borehole video and aquifer-test data for the Burnpit well (U.S. Geological Survey [USGS] National Water Information System identification 435240103265301), Mount Rushmore National Memorial, collected in June and July 2020. The data accompany a USGS Scientific Investigations Report by Eldridge and others (2021).
Soil-Water Balance model for alluvial deposits in Summerset, South Dakota Soil-Water Balance model for alluvial deposits in Summerset, South Dakota
A Soil-Water Balance (SWB) model of the alluvial aquifer in north Summerset, South Dakota, was constructed to estimate recharge and potential evapotranspiration volumes and rates for 2017-19. The model area included the northern part of the city of Summerset in west South Dakota along the east range of the Black Hills. The model area was defined as a rectangular area that included the...
MODFLOW-6 model of the Big Sioux aquifer, Sioux Falls, South Dakota MODFLOW-6 model of the Big Sioux aquifer, Sioux Falls, South Dakota
A MODFLOW-6 groundwater flow model of the Big Sioux aquifer near Sioux Falls in southeastern South Dakota, was constructed to improve the understanding and management of the water supply resources for the City of Sioux Falls.
Water-level data and AQTESOLV Pro analysis results for slug tests in the Big Sioux Aquifer, Sioux Falls, South Dakota, 2017 Water-level data and AQTESOLV Pro analysis results for slug tests in the Big Sioux Aquifer, Sioux Falls, South Dakota, 2017
Well and aquifer data were collected from field measurements and drillers' logs. Multiple slug tests were completed at each well with a transducer to record the change in water level and a U.S. Geological Survey standard mechanical slug to displace the well's water column. A Solinst Levelogger LT F30/M10 electronic transducer (unvented) was used to record water-level changes during each...
MODFLOW-NWT model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015 MODFLOW-NWT model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015
A previously developed three-dimensional groundwater flow model (https://doi.org/10.3133/sir20125183) of the three primary aquifers in the region north of Aberdeen, South Dakota, was revised to assist the City of Aberdeen with water-resource planning. The principal aquifers are the Elm, Middle James, and Deep James. The numerical model is intended to be used to (1) simulate hydrologic...
Filter Total Items: 13
Multivariate analysis of hydrochemical data for Jewel Cave, Wind Cave, and surrounding areas Multivariate analysis of hydrochemical data for Jewel Cave, Wind Cave, and surrounding areas
Jewel Cave National Monument and Wind Cave National Park in South Dakota contain two of the six longest caves worldwide. These caves contain subterranean lakes that are important points of intersection between the water table of the Madison aquifer and the caves. During 2015 to 2017, several subterranean lakes were discovered in Jewel Cave, which previously was thought to be above the...
Authors
Andrew J. Long, James B. Paces, William G. Eldridge
Generalized potentiometric-surface map and groundwater flow directions in the Madison aquifer near Jewel Cave National Monument, South Dakota Generalized potentiometric-surface map and groundwater flow directions in the Madison aquifer near Jewel Cave National Monument, South Dakota
A generalized potentiometric-surface map of the Madison aquifer near Jewel Cave National Monument was constructed using water levels measured from calendar years 1988 to 2019 in 24 groundwater wells and 4 subterranean cave lakes interpreted to be in hydraulic connection with the aquifer. The map indicated that groundwater near Jewel Cave National Monument originates from recharge sources...
Authors
Todd M. Anderson, William G. Eldridge, Joshua F. Valder, Michael E. Wiles
Hydraulic conductivity estimates from slug tests in the Big Sioux aquifer near Sioux Falls, South Dakota Hydraulic conductivity estimates from slug tests in the Big Sioux aquifer near Sioux Falls, South Dakota
Hydraulic conductivity estimates were made for 15 observation wells using slug-out (rising-head) tests in the Big Sioux aquifer near Sioux Falls, South Dakota, as part of a cooperative study with the City of Sioux Falls to characterize the hydrogeology and the extent of the Big Sioux aquifer north of the city. Well and aquifer data were collected from field measurements and drillers’...
Authors
William G. Eldridge, Colton J. Medler
Revised groundwater-flow model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015 Revised groundwater-flow model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015
The city of Aberdeen, in northeastern South Dakota, requires an expanded and sustainable supply of water to meet current and future demands. Conceptual and numerical models of the glacial aquifer system in the area north of Aberdeen were developed by the U.S. Geological Survey in cooperation with the City of Aberdeen in 2012. The U.S. Geological Survey, in cooperation with the City of...
Authors
Joshua F. Valder, William G. Eldridge, Kyle W. Davis, Colton J. Medler, Karl R. Koth
Movement ecology of five Afrotropical waterfowl species from Malawi, Mali and Nigeria Movement ecology of five Afrotropical waterfowl species from Malawi, Mali and Nigeria
Habitat availability for Afrotropical waterbirds is highly dynamic with unpredictable rainfall patterns and ephemeral wetlands resulting in diverse movement strategies among different species. Movement strategies among waterfowl encompass resident, regional and intercontinental migrants, but little quantitative information exists on their specific movement patterns. We studied the...
Authors
John Y. Takekawa, Shane R. Heath, S. R. L. Iverson, Nicolas Gaidet, Julien Cappelle, Tim Dodman, Ward Hagemeijer, William D. Eldridge, Scott A. Petrie, Gregory S. Yarris, Shiiwua Manu, Glenn H. Olsen, Diann J. Prosser, Kyle A. Spragens, David C. Douglas, Scott H. Newman
Effects of El Niño on distribution and reproductive performance of Black Brant Effects of El Niño on distribution and reproductive performance of Black Brant
Climate in low-latitude wintering areas may influence temperate and high-latitude breeding populations of birds, but demonstrations of such relationships have been rare because of difficulties in linking wintering with breeding populations. We used long-term aerial surveys in Mexican wintering areas and breeding areas in Alaska, USA, to assess numbers of Black Brant (Branta bernicla...
Authors
James S. Sedinger, David H. Ward, Jason L. Schamber, William I. Butler, William D. Eldridge, Bruce Conant, James F. Voelzer, Nathan Chelgren, Mark P. Herzog
Science and Products
Datasets Used to Create Maps of Pierre Shale Elevation and Surficial Deposit Thickness within and near Ellsworth Air Force Base, South Dakota, 2021 Datasets Used to Create Maps of Pierre Shale Elevation and Surficial Deposit Thickness within and near Ellsworth Air Force Base, South Dakota, 2021
This data release contains borehole geophysical data collected within and near Ellsworth Air Force Base, South Dakota, from September 2020 to August 2021. The data accompanies a USGS scientific investigations map from Medler and others (2022). The U.S. Geological Survey, in cooperation with the U.S. Air Force Civil Engineer Center, collected borehole geophysical data and performed simple...
Borehole Video and Aquifer Test Data for the Burnpit Well, Mount Rushmore National Memorial, South Dakota, 2020 Borehole Video and Aquifer Test Data for the Burnpit Well, Mount Rushmore National Memorial, South Dakota, 2020
This data release contains borehole video and aquifer-test data for the Burnpit well (U.S. Geological Survey [USGS] National Water Information System identification 435240103265301), Mount Rushmore National Memorial, collected in June and July 2020. The data accompany a USGS Scientific Investigations Report by Eldridge and others (2021).
Soil-Water Balance model for alluvial deposits in Summerset, South Dakota Soil-Water Balance model for alluvial deposits in Summerset, South Dakota
A Soil-Water Balance (SWB) model of the alluvial aquifer in north Summerset, South Dakota, was constructed to estimate recharge and potential evapotranspiration volumes and rates for 2017-19. The model area included the northern part of the city of Summerset in west South Dakota along the east range of the Black Hills. The model area was defined as a rectangular area that included the...
MODFLOW-6 model of the Big Sioux aquifer, Sioux Falls, South Dakota MODFLOW-6 model of the Big Sioux aquifer, Sioux Falls, South Dakota
A MODFLOW-6 groundwater flow model of the Big Sioux aquifer near Sioux Falls in southeastern South Dakota, was constructed to improve the understanding and management of the water supply resources for the City of Sioux Falls.
Water-level data and AQTESOLV Pro analysis results for slug tests in the Big Sioux Aquifer, Sioux Falls, South Dakota, 2017 Water-level data and AQTESOLV Pro analysis results for slug tests in the Big Sioux Aquifer, Sioux Falls, South Dakota, 2017
Well and aquifer data were collected from field measurements and drillers' logs. Multiple slug tests were completed at each well with a transducer to record the change in water level and a U.S. Geological Survey standard mechanical slug to displace the well's water column. A Solinst Levelogger LT F30/M10 electronic transducer (unvented) was used to record water-level changes during each...
MODFLOW-NWT model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015 MODFLOW-NWT model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015
A previously developed three-dimensional groundwater flow model (https://doi.org/10.3133/sir20125183) of the three primary aquifers in the region north of Aberdeen, South Dakota, was revised to assist the City of Aberdeen with water-resource planning. The principal aquifers are the Elm, Middle James, and Deep James. The numerical model is intended to be used to (1) simulate hydrologic...
Filter Total Items: 13
Multivariate analysis of hydrochemical data for Jewel Cave, Wind Cave, and surrounding areas Multivariate analysis of hydrochemical data for Jewel Cave, Wind Cave, and surrounding areas
Jewel Cave National Monument and Wind Cave National Park in South Dakota contain two of the six longest caves worldwide. These caves contain subterranean lakes that are important points of intersection between the water table of the Madison aquifer and the caves. During 2015 to 2017, several subterranean lakes were discovered in Jewel Cave, which previously was thought to be above the...
Authors
Andrew J. Long, James B. Paces, William G. Eldridge
Generalized potentiometric-surface map and groundwater flow directions in the Madison aquifer near Jewel Cave National Monument, South Dakota Generalized potentiometric-surface map and groundwater flow directions in the Madison aquifer near Jewel Cave National Monument, South Dakota
A generalized potentiometric-surface map of the Madison aquifer near Jewel Cave National Monument was constructed using water levels measured from calendar years 1988 to 2019 in 24 groundwater wells and 4 subterranean cave lakes interpreted to be in hydraulic connection with the aquifer. The map indicated that groundwater near Jewel Cave National Monument originates from recharge sources...
Authors
Todd M. Anderson, William G. Eldridge, Joshua F. Valder, Michael E. Wiles
Hydraulic conductivity estimates from slug tests in the Big Sioux aquifer near Sioux Falls, South Dakota Hydraulic conductivity estimates from slug tests in the Big Sioux aquifer near Sioux Falls, South Dakota
Hydraulic conductivity estimates were made for 15 observation wells using slug-out (rising-head) tests in the Big Sioux aquifer near Sioux Falls, South Dakota, as part of a cooperative study with the City of Sioux Falls to characterize the hydrogeology and the extent of the Big Sioux aquifer north of the city. Well and aquifer data were collected from field measurements and drillers’...
Authors
William G. Eldridge, Colton J. Medler
Revised groundwater-flow model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015 Revised groundwater-flow model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015
The city of Aberdeen, in northeastern South Dakota, requires an expanded and sustainable supply of water to meet current and future demands. Conceptual and numerical models of the glacial aquifer system in the area north of Aberdeen were developed by the U.S. Geological Survey in cooperation with the City of Aberdeen in 2012. The U.S. Geological Survey, in cooperation with the City of...
Authors
Joshua F. Valder, William G. Eldridge, Kyle W. Davis, Colton J. Medler, Karl R. Koth
Movement ecology of five Afrotropical waterfowl species from Malawi, Mali and Nigeria Movement ecology of five Afrotropical waterfowl species from Malawi, Mali and Nigeria
Habitat availability for Afrotropical waterbirds is highly dynamic with unpredictable rainfall patterns and ephemeral wetlands resulting in diverse movement strategies among different species. Movement strategies among waterfowl encompass resident, regional and intercontinental migrants, but little quantitative information exists on their specific movement patterns. We studied the...
Authors
John Y. Takekawa, Shane R. Heath, S. R. L. Iverson, Nicolas Gaidet, Julien Cappelle, Tim Dodman, Ward Hagemeijer, William D. Eldridge, Scott A. Petrie, Gregory S. Yarris, Shiiwua Manu, Glenn H. Olsen, Diann J. Prosser, Kyle A. Spragens, David C. Douglas, Scott H. Newman
Effects of El Niño on distribution and reproductive performance of Black Brant Effects of El Niño on distribution and reproductive performance of Black Brant
Climate in low-latitude wintering areas may influence temperate and high-latitude breeding populations of birds, but demonstrations of such relationships have been rare because of difficulties in linking wintering with breeding populations. We used long-term aerial surveys in Mexican wintering areas and breeding areas in Alaska, USA, to assess numbers of Black Brant (Branta bernicla...
Authors
James S. Sedinger, David H. Ward, Jason L. Schamber, William I. Butler, William D. Eldridge, Bruce Conant, James F. Voelzer, Nathan Chelgren, Mark P. Herzog