Deep Groundwater Total Dissolved Solids Mapping in the Dakota Group, Williston Basin, USA.
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| Title: | Deep Groundwater Total Dissolved Solids Mapping in the Dakota Group, Williston Basin, USA. |
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| Authors: | Stephens, Michael J. (AUTHOR) mjstephens@usgs.gov, Hoogenboom, Bennett E.1 (AUTHOR) bhoogenboom@usgs.gov, Ball, Lyndsay B.2 (AUTHOR) lbball@usgs.gov, Chang, Will3 (AUTHOR) will@hypergradient.ai |
| Source: | Ground Water. May2026, Vol. 64 Issue 3, p335-349. 15p. |
| Subjects: | Groundwater, Porosity, Geological statistics, Hydrogeology, Aquifers, Sedimentary basins, Dissolved organic matter |
| Geographic Terms: | Williston Basin, United States |
| Abstract: | Growing concern about the quantity of available freshwater around the world has led to interest in surveying groundwater total dissolved solids (TDS) below water well depths. Deep TDS has not been systematically mapped, and there is much to learn about the distribution and controls on deeper groundwater. In sedimentary basins across the United States, groundwater resources often overlie hydrocarbon resources, providing an opportunity to use borehole geophysical data collected for hydrocarbons to characterize groundwater and pore space resources. This study adapts a recently developed subsurface geostatistical and geophysical modeling approach to continuously map groundwater TDS, porosity, and temperature in the Dakota Group of the Williston Basin—an undercharacterized regional aquifer system overlying deeper hydrocarbon reservoirs. Groundwater TDS in the Dakota Group ranges from approximately 4800 to 26,900 mg/L. TDS patterns are stratified with higher TDS in the lower and upper Dakota Group, and relatively lower TDS in the middle Dakota Group. The lower TDS in the middle zone may represent a preferential regional flow path for lower‐TDS meteoric recharge from the west. The alternating pattern of TDS may also be evidence of higher‐TDS inflows into the Dakota Group from underlying and potentially from overlying aquifers. Porosity is lower near the center of the Williston Basin and tends to be higher to the east, which may be related to grain size distributions. The new regional TDS and porosity modeling serves as a quantitative reference for water users and provides supporting evidence for hypotheses on Dakota Group recharge. [ABSTRACT FROM AUTHOR] |
| Copyright of Ground Water is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 193626506 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Deep Groundwater Total Dissolved Solids Mapping in the Dakota Group, Williston Basin, USA. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Stephens%2C+Michael+J%2E%22">Stephens, Michael J.</searchLink> (AUTHOR)<i> mjstephens@usgs.gov</i><br /><searchLink fieldCode="AR" term="%22Hoogenboom%2C+Bennett+E%2E%22">Hoogenboom, Bennett E.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> bhoogenboom@usgs.gov</i><br /><searchLink fieldCode="AR" term="%22Ball%2C+Lyndsay+B%2E%22">Ball, Lyndsay B.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> lbball@usgs.gov</i><br /><searchLink fieldCode="AR" term="%22Chang%2C+Will%22">Chang, Will</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> will@hypergradient.ai</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Ground+Water%22">Ground Water</searchLink>. May2026, Vol. 64 Issue 3, p335-349. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Groundwater%22">Groundwater</searchLink><br /><searchLink fieldCode="DE" term="%22Porosity%22">Porosity</searchLink><br /><searchLink fieldCode="DE" term="%22Geological+statistics%22">Geological statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogeology%22">Hydrogeology</searchLink><br /><searchLink fieldCode="DE" term="%22Aquifers%22">Aquifers</searchLink><br /><searchLink fieldCode="DE" term="%22Sedimentary+basins%22">Sedimentary basins</searchLink><br /><searchLink fieldCode="DE" term="%22Dissolved+organic+matter%22">Dissolved organic matter</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Williston+Basin%22">Williston Basin</searchLink><br /><searchLink fieldCode="DE" term="%22United+States%22">United States</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Growing concern about the quantity of available freshwater around the world has led to interest in surveying groundwater total dissolved solids (TDS) below water well depths. Deep TDS has not been systematically mapped, and there is much to learn about the distribution and controls on deeper groundwater. In sedimentary basins across the United States, groundwater resources often overlie hydrocarbon resources, providing an opportunity to use borehole geophysical data collected for hydrocarbons to characterize groundwater and pore space resources. This study adapts a recently developed subsurface geostatistical and geophysical modeling approach to continuously map groundwater TDS, porosity, and temperature in the Dakota Group of the Williston Basin—an undercharacterized regional aquifer system overlying deeper hydrocarbon reservoirs. Groundwater TDS in the Dakota Group ranges from approximately 4800 to 26,900 mg/L. TDS patterns are stratified with higher TDS in the lower and upper Dakota Group, and relatively lower TDS in the middle Dakota Group. The lower TDS in the middle zone may represent a preferential regional flow path for lower‐TDS meteoric recharge from the west. The alternating pattern of TDS may also be evidence of higher‐TDS inflows into the Dakota Group from underlying and potentially from overlying aquifers. Porosity is lower near the center of the Williston Basin and tends to be higher to the east, which may be related to grain size distributions. The new regional TDS and porosity modeling serves as a quantitative reference for water users and provides supporting evidence for hypotheses on Dakota Group recharge. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Ground Water is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/gwat.70066 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 335 Subjects: – SubjectFull: Groundwater Type: general – SubjectFull: Porosity Type: general – SubjectFull: Geological statistics Type: general – SubjectFull: Hydrogeology Type: general – SubjectFull: Aquifers Type: general – SubjectFull: Sedimentary basins Type: general – SubjectFull: Dissolved organic matter Type: general – SubjectFull: Williston Basin Type: general – SubjectFull: United States Type: general Titles: – TitleFull: Deep Groundwater Total Dissolved Solids Mapping in the Dakota Group, Williston Basin, USA. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Stephens, Michael J. – PersonEntity: Name: NameFull: Hoogenboom, Bennett E. – PersonEntity: Name: NameFull: Ball, Lyndsay B. – PersonEntity: Name: NameFull: Chang, Will IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 0017467X Numbering: – Type: volume Value: 64 – Type: issue Value: 3 Titles: – TitleFull: Ground Water Type: main |
| ResultId | 1 |
