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Joshua Valder

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Cees van Westen

University of Twente, Faculty of Geoinformation Science and Earth Observation (ITC)

Armando Marques-Guedes

UNL - New University of Lisbon

University College London

Paulo Emanuel T F Fonseca

Universidade de Lisboa

Aminuddin Ab Ghani

Universiti Sains Malaysia

Consiglio Nazionale delle Ricerche (CNR)

University of Prishtina

Eric Kwabena Forkuo

Kwame Nkrumah University of Science and Technology

Umm Al-Qura University, Makkah, Saudi Arabia

Kwasi Appeaning Addo

University Of Ghana, Accra,Legon

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Papers by Joshua Valder

Estimates of water use associated with continuous oil and gas development in the Permian Basin, Texas and New Mexico, 2010–19

Scientific Investigations Report

Estimates of water use associated with continuous oil and gas development in the Permian Basin, Texas and New Mexico, 2010–19, with comparisons to the Williston Basin, North Dakota and Montana

Fact Sheet

Conceptual and numerical groundwater flow model of the Cedar River alluvial aquifer system with simulation of drought stress on groundwater availability near Cedar Rapids, Iowa, for 2011 through 2013

Scientific Investigations Report

Stratigraphic units of shallow unconsolidated deposits in Deadwood, South Dakota, delineated by real-time kinematic surveys

Scientific Investigations Map

The City of Deadwood, South Dakota, has been working on a new archeological investigation in prep... more The City of Deadwood, South Dakota, has been working on a new archeological investigation in preparation for economic growth and expansion within the city limits, through the Deadwood Historic Preservation Office. During the excavation process, buried artifacts and historical features from the late 1800s have been uncovered. The stratigraphy of shallow unconsolidated deposits in the city of Deadwood, S. Dak., was surveyed on January 29, 2020, using real-time kinematic survey methods and described to identify variations in geologic material, thickness, and depth from the land surface in support of archeological studies by the city. The findings of the study will provide city managers and the public with reliable and impartial information for their use by advancing field or analytical methodology and understanding of hydrologic processes in the study area. The primary excavation site was surveyed, and stratigraphic units were delineated from changes in material properties or depositional environment. The primary excavation site consisted of nine stratigraphic units; however, some units were not consistent along the length of the excavation and pinched out along the cross section. Survey data points also were collected for artifacts and other sites of interest. The shallow surficial geology in the study area was affected by human construction, fires, and flooding.

Estimates of water use associated with continuous oil and gas development in the Williston Basin, North Dakota and Montana, 2007–17

Scientific Investigations Report

Bureau of Mines and Geology, and other officials from North Dakota and Montana for their support ... more Bureau of Mines and Geology, and other officials from North Dakota and Montana for their support of past and ongoing projects that provided valuable information for this study. Hess Corporation and Whiting Petroleum Corporation offered beneficial information on water use by oil and gas operators in North Dakota, and the Southwest Water Authority offered useful information on water use by water permit holders in North Dakota. The authors also thank IHS Markit for approving access to aggregated data on hydraulic fracturing water use in Montana. This study was supported by the U.S. Geological Survey Water Availability and Use Science Program. The authors thank the following colleagues with the U.S. Geological Survey. DeAnn Dutton, Robert Lundgren, Roy Sando, and Spencer Wheeling assisted with gathering and processing the water-use data. Brian Clark and William Eldridge provided thoughtful edits and comments in reviewing this report, and Molly Maupin and Mindi Dalton provided helpful guidance as members of the project management team.

Analytical framework to estimate water use associated with continuous oil and gas development

Scientific Investigations Report

For an overview of USGS information products, including maps, imagery, and publications, visit ht... more For an overview of USGS information products, including maps, imagery, and publications, visit https://store.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 may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.

Generalized potentiometric-surface map and groundwater flow directions in the Madison aquifer near Jewel Cave National Monument, South Dakota

Scientific Investigations Report

For an overview of USGS information products, including maps, imagery, and publications, visit ht... more For an overview of USGS information products, including maps, imagery, and publications, visit https://store.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 may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.

APPLICATION OF A TOWED TIME-DOMAIN ELECTROMAGNETIC (tTEM) IMAGING SYSTEM IN JAMESTOWN, NORTH DAKOTA

Symposium on the Application of Geophysics to Engineering and Environmental Problems 2019

Conceptual model to assess water use associated with the life cycle of unconventional oil and gas development

Scientific Investigations Report

For an overview of USGS information products, including maps, imagery, and publications, visit ht... more For an overview of USGS information products, including maps, imagery, and publications, visit https://store.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 may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.

Hydrogeologic framework and groundwater conditions of the Ararat Basin in Armenia

Scientific Investigations Report

This astronaut photograph, taken from the International Space Station, highlights a segment of th... more This astronaut photograph, taken from the International Space Station, highlights a segment of the international border between Armenia and Turkey. The Aras River separates the two countries, with Armenia to the north-northeast and Turkey to the south-southwest. Extensive green agricultural fields are common on both sides of the river (upper part of image), as well as a number of gray-totan urban areas including Yerevan (image top, slightly left of center) and Artashat and Armavir in Armenia, and Iğdır in Turkey. While there have been efforts to normalize diplomatic relations between the two countries in recent years, the Armenia-Turkey border remains officially closed.

Delineation of selected lithologic units using airborne electromagnetic data near Cedar Rapids, Iowa

Scientific Investigations Map

Revised groundwater-flow model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015

Scientific Investigations Report

For an overview of USGS information products, including maps, imagery, and publications, visit ht... more For an overview of USGS information products, including maps, imagery, and publications, visit https://store.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 may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.

Construction of a groundwater-flow model for the Big Sioux Aquifer using airborne electromagnetic methods, Sioux Falls, South Dakota

Fact Sheet, 2016

Characterization of the Hydrogeologic Framework of the Big Sioux Aquifer, Sioux Falls, South Dakota, Using Airborne Electromagnetic Data

Building science-based groundwater tools and capacity in Armenia for the Ararat Basin

Fact Sheet, 2016

Study Design and Percent Recoveries of Anthropogenic Organic Compounds With and Without the Addition of Ascorbic Acid to Preserve Water Samples Containing Free Chlorine, 2004-06

Open File Report, 2008

The National Water-Quality Assessment(NAWQA) Program of the US Geological Survey(USGS) began impl... more

Identifying Source Waters in the Karstic Madison Aquifer on the Basis of Water Chemistry, Wind Cave National Park, South Dakota

The U.S. Geological Survey and the National Park Service are studying the Madison aquifer in Wind... more The U.S. Geological Survey and the National Park Service are studying the Madison aquifer in Wind Cave National Park in the southern Black Hills of South Dakota. The purpose of the study is to better understand complex groundwater flow through the karstic Madison aquifer in and around Wind Cave National Park and to identify source-water areas for different sample locations on the basis of water chemistry. Samples collected in 2007 from 20 locations in Wind Cave National Park were analyzed for major ions, nitrate, and stable isotopes. To identify recharge areas or other source waters for the study area, an end-member mixing model utilizing principal component analysis is used to estimate the water chemistry of probable source waters, or end members. End-member chemistries are estimated by using two different methods. The first method assumes that none of the samples necessarily represents any specific end member. The second method determines which samples most likely represent end members through statistical evaluation. Possible end members include source water from local outcrop recharge, recharge on the outcrop on the western side of the Black Hills, and regional groundwater flow from west of the Black Hills. The mixing proportions of these end members are estimated for several sampling sites. Results of this study can be applied to better characterize groundwater flow through the complex karst environment and can provide insight about which areas are more important to protect from contamination in relation to a particular well or spring in the southern Black Hills.

Building groundwater modeling capacity in Mongolia

Open-File Report, 2016

Volatile Organic Compounds in Samples from Domestic and Public Wells, 1985-2002

Scientific Investigations Map, 2006

Percent recoveries of anthropogenic organic compounds with and without the addition of ascorbic acid to preserve finished-water samples containing free chlorine, 2004-10

Open File Report, 2011

Estimates of water use associated with continuous oil and gas development in the Permian Basin, Texas and New Mexico, 2010–19

Scientific Investigations Report

Estimates of water use associated with continuous oil and gas development in the Permian Basin, Texas and New Mexico, 2010–19, with comparisons to the Williston Basin, North Dakota and Montana

Fact Sheet

Conceptual and numerical groundwater flow model of the Cedar River alluvial aquifer system with simulation of drought stress on groundwater availability near Cedar Rapids, Iowa, for 2011 through 2013

Scientific Investigations Report

Stratigraphic units of shallow unconsolidated deposits in Deadwood, South Dakota, delineated by real-time kinematic surveys

Scientific Investigations Map

The City of Deadwood, South Dakota, has been working on a new archeological investigation in prep... more The City of Deadwood, South Dakota, has been working on a new archeological investigation in preparation for economic growth and expansion within the city limits, through the Deadwood Historic Preservation Office. During the excavation process, buried artifacts and historical features from the late 1800s have been uncovered. The stratigraphy of shallow unconsolidated deposits in the city of Deadwood, S. Dak., was surveyed on January 29, 2020, using real-time kinematic survey methods and described to identify variations in geologic material, thickness, and depth from the land surface in support of archeological studies by the city. The findings of the study will provide city managers and the public with reliable and impartial information for their use by advancing field or analytical methodology and understanding of hydrologic processes in the study area. The primary excavation site was surveyed, and stratigraphic units were delineated from changes in material properties or depositional environment. The primary excavation site consisted of nine stratigraphic units; however, some units were not consistent along the length of the excavation and pinched out along the cross section. Survey data points also were collected for artifacts and other sites of interest. The shallow surficial geology in the study area was affected by human construction, fires, and flooding.

Estimates of water use associated with continuous oil and gas development in the Williston Basin, North Dakota and Montana, 2007–17

Scientific Investigations Report

Bureau of Mines and Geology, and other officials from North Dakota and Montana for their support ... more Bureau of Mines and Geology, and other officials from North Dakota and Montana for their support of past and ongoing projects that provided valuable information for this study. Hess Corporation and Whiting Petroleum Corporation offered beneficial information on water use by oil and gas operators in North Dakota, and the Southwest Water Authority offered useful information on water use by water permit holders in North Dakota. The authors also thank IHS Markit for approving access to aggregated data on hydraulic fracturing water use in Montana. This study was supported by the U.S. Geological Survey Water Availability and Use Science Program. The authors thank the following colleagues with the U.S. Geological Survey. DeAnn Dutton, Robert Lundgren, Roy Sando, and Spencer Wheeling assisted with gathering and processing the water-use data. Brian Clark and William Eldridge provided thoughtful edits and comments in reviewing this report, and Molly Maupin and Mindi Dalton provided helpful guidance as members of the project management team.

Analytical framework to estimate water use associated with continuous oil and gas development

Scientific Investigations Report

For an overview of USGS information products, including maps, imagery, and publications, visit ht... more For an overview of USGS information products, including maps, imagery, and publications, visit https://store.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 may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.

Generalized potentiometric-surface map and groundwater flow directions in the Madison aquifer near Jewel Cave National Monument, South Dakota

Scientific Investigations Report

For an overview of USGS information products, including maps, imagery, and publications, visit ht... more For an overview of USGS information products, including maps, imagery, and publications, visit https://store.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 may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.

APPLICATION OF A TOWED TIME-DOMAIN ELECTROMAGNETIC (tTEM) IMAGING SYSTEM IN JAMESTOWN, NORTH DAKOTA

Symposium on the Application of Geophysics to Engineering and Environmental Problems 2019

Conceptual model to assess water use associated with the life cycle of unconventional oil and gas development

Scientific Investigations Report

For an overview of USGS information products, including maps, imagery, and publications, visit ht... more For an overview of USGS information products, including maps, imagery, and publications, visit https://store.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 may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.

Hydrogeologic framework and groundwater conditions of the Ararat Basin in Armenia

Scientific Investigations Report

This astronaut photograph, taken from the International Space Station, highlights a segment of th... more This astronaut photograph, taken from the International Space Station, highlights a segment of the international border between Armenia and Turkey. The Aras River separates the two countries, with Armenia to the north-northeast and Turkey to the south-southwest. Extensive green agricultural fields are common on both sides of the river (upper part of image), as well as a number of gray-totan urban areas including Yerevan (image top, slightly left of center) and Artashat and Armavir in Armenia, and Iğdır in Turkey. While there have been efforts to normalize diplomatic relations between the two countries in recent years, the Armenia-Turkey border remains officially closed.

Delineation of selected lithologic units using airborne electromagnetic data near Cedar Rapids, Iowa

Scientific Investigations Map

Revised groundwater-flow model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015

Scientific Investigations Report

For an overview of USGS information products, including maps, imagery, and publications, visit ht... more For an overview of USGS information products, including maps, imagery, and publications, visit https://store.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 may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.

Construction of a groundwater-flow model for the Big Sioux Aquifer using airborne electromagnetic methods, Sioux Falls, South Dakota

Fact Sheet, 2016

Characterization of the Hydrogeologic Framework of the Big Sioux Aquifer, Sioux Falls, South Dakota, Using Airborne Electromagnetic Data

Building science-based groundwater tools and capacity in Armenia for the Ararat Basin

Fact Sheet, 2016

Study Design and Percent Recoveries of Anthropogenic Organic Compounds With and Without the Addition of Ascorbic Acid to Preserve Water Samples Containing Free Chlorine, 2004-06

Open File Report, 2008

The National Water-Quality Assessment(NAWQA) Program of the US Geological Survey(USGS) began impl... more

Identifying Source Waters in the Karstic Madison Aquifer on the Basis of Water Chemistry, Wind Cave National Park, South Dakota

The U.S. Geological Survey and the National Park Service are studying the Madison aquifer in Wind... more The U.S. Geological Survey and the National Park Service are studying the Madison aquifer in Wind Cave National Park in the southern Black Hills of South Dakota. The purpose of the study is to better understand complex groundwater flow through the karstic Madison aquifer in and around Wind Cave National Park and to identify source-water areas for different sample locations on the basis of water chemistry. Samples collected in 2007 from 20 locations in Wind Cave National Park were analyzed for major ions, nitrate, and stable isotopes. To identify recharge areas or other source waters for the study area, an end-member mixing model utilizing principal component analysis is used to estimate the water chemistry of probable source waters, or end members. End-member chemistries are estimated by using two different methods. The first method assumes that none of the samples necessarily represents any specific end member. The second method determines which samples most likely represent end members through statistical evaluation. Possible end members include source water from local outcrop recharge, recharge on the outcrop on the western side of the Black Hills, and regional groundwater flow from west of the Black Hills. The mixing proportions of these end members are estimated for several sampling sites. Results of this study can be applied to better characterize groundwater flow through the complex karst environment and can provide insight about which areas are more important to protect from contamination in relation to a particular well or spring in the southern Black Hills.

Building groundwater modeling capacity in Mongolia

Open-File Report, 2016

Volatile Organic Compounds in Samples from Domestic and Public Wells, 1985-2002

Scientific Investigations Map, 2006

Percent recoveries of anthropogenic organic compounds with and without the addition of ascorbic acid to preserve finished-water samples containing free chlorine, 2004-10

Open File Report, 2011