Clifford I Voss, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 78
Thermal and hydrological observations near Twelvemile Lake in discontinuous permafrost, Yukon Flats, interior Alaska, September 2010-August 2011 Thermal and hydrological observations near Twelvemile Lake in discontinuous permafrost, Yukon Flats, interior Alaska, September 2010-August 2011
A series of ground-based observations were made between September 2010 and August 2011 near Twelvemile Lake, 19 kilometers southwest of Fort Yukon, Alaska, for use in ongoing hydrological analyses of watersheds in this region of discontinuous permafrost. Measurements include depth to ground ice, depth to water table, soil texture, soil moisture, soil temperature, and water pressure above...
Authors
Steven Jepsen, Joshua Koch, Joshua Rose, Clifford Voss, Michelle Walvoord
Glaciation and regional groundwater flow in the Fennoscandian shield Glaciation and regional groundwater flow in the Fennoscandian shield
Regional-scale groundwater flow modeling of the Fennoscandian shield suggests that groundwater flow can be strongly affected by future climate change and glaciation. We considered variable-density groundwater flow in a 1500-km-long and approximately 10-km-deep cross-section through southern Sweden. Groundwater flow and shield brine transport in the cross-sectional model were analyzed...
Authors
A.M. Provost, C.I. Voss, C. E. Neuzil
Modeling radium distribution in coastal aquifers during sea level changes: The Dead Sea case Modeling radium distribution in coastal aquifers during sea level changes: The Dead Sea case
We present a new approach to studying the behavior of radium isotopes in a coastal aquifer. In order to simulate radium isotope distributions in the dynamic flow field of the Dead Sea aquifer, a multi-species density dependent flow model (SUTRA-MS) was used. Field data show that the activity of 226Ra decreases from 140 to 60 dpm/L upon entering the aquifer from the Dead Sea, and then...
Authors
Yael Kiro, Yoseph Yechieli, Clifford Voss, Abraham Starinsky, Yishai Weinstein
Airborne electromagnetic imaging of discontinuous permafrost Airborne electromagnetic imaging of discontinuous permafrost
The evolution of permafrost in cold regions is inextricably connected to hydrogeologic processes, climate, and ecosystems. Permafrost thawing has been linked to changes in wetland and lake areas, alteration of the groundwater contribution to streamflow, carbon release, and increased fire frequency. But detailed knowledge about the dynamic state of permafrost in relation to surface and...
Authors
B. J. Minsley, J.D. Abraham, B. Smith, J. Cannia, C.I. Voss, M.T. Jorgenson, Michelle Walvoord, B.K. Wylie, L. Anderson, L.B. Ball, M. Deszcz-Pan, T.P. Wellman, T. Ager
Exchange of Groundwater and Surface-Water Mediated by Permafrost Response to Seasonal and Long Term Air Temperature Variation Exchange of Groundwater and Surface-Water Mediated by Permafrost Response to Seasonal and Long Term Air Temperature Variation
Permafrost dynamics impact hydrologic cycle processes by promoting or impeding groundwater and surface water exchange. Under seasonal and decadal air temperature variations, permafrost temperature changes control the exchanges between groundwater and surface water. A coupled heat transport and groundwater flow model, SUTRA, was modified to simulate groundwater flow and heat transport in...
Authors
Shemin Ge, Jeffrey McKenzie, Clifford Voss, Qingbai Wu
Exchange of groundwater and surface-water mediated by permafrost response to seasonal and long term air temperature variation Exchange of groundwater and surface-water mediated by permafrost response to seasonal and long term air temperature variation
Permafrost dynamics impact hydrologic cycle processes by promoting or impeding groundwater and surface water exchange. Under seasonal and decadal air temperature variations, permafrost temperature changes control the exchanges between groundwater and surface water. A coupled heat transport and groundwater flow model, SUTRA, was modified to simulate groundwater flow and heat transport in...
Authors
S. Ge, J. McKenzie, C. Voss, Q. Wu
Airborne electromagnetic and magnetic geophysical survey data of the Yukon Flats and Fort Wainwright areas, central Alaska, June 2010 Airborne electromagnetic and magnetic geophysical survey data of the Yukon Flats and Fort Wainwright areas, central Alaska, June 2010
In June 2010, the U.S. Geological Survey conducted airborne electromagnetic and magnetic surveys of the Yukon Flats and Fort Wainwright study areas in central Alaska. These data were collected to estimate the three-dimensional distribution of permafrost at the time of the survey. These data were also collected to evaluate the effectiveness of these geophysical methods at mapping...
Authors
Lyndsay Ball, Bruce Smith, Burke Minsley, Jared D. Abraham, Clifford Voss, Beth Astley, Maria Deszcz-Pan, James Cannia
Editor’s message: Groundwater modeling fantasies - Part 1, adrift in the details Editor’s message: Groundwater modeling fantasies - Part 1, adrift in the details
Fools ignore complexity. Pragmatists suffer it. Some can avoid it. Geniuses remove it. …Simplicity does not precede complexity, but follows it. (Epigrams in Programming by Alan Perlis, a computer scientist; Perlis 1982). A doctoral student creating a groundwater model of a regional aquifer put individual circular regions around data points where he had hydraulic head measurements, so...
Authors
Clifford Voss
Editor’s message: Groundwater modeling fantasies - Part 2, down to earth Editor’s message: Groundwater modeling fantasies - Part 2, down to earth
Simplicity is the final achievement. After one has played a vast quantity of notes and more notes, it is simplicity that emerges as the crowning reward of art. (Frédéric Chopin, a musician and composer, quoted in If Not God, Then What? by Fost 2007) Despite the dubious developments discussed in part 1 of this Editor’s Message (Voss 2011), groundwater modeling really does represent the...
Authors
Clifford Voss
Three-dimensional benchmark for variable-density flow and transport simulation: matching semi-analytic stability modes for steady unstable convection in an inclined porous box Three-dimensional benchmark for variable-density flow and transport simulation: matching semi-analytic stability modes for steady unstable convection in an inclined porous box
This benchmark for three-dimensional (3D) numerical simulators of variable-density groundwater flow and solute or energy transport consists of matching simulation results with the semi-analytical solution for the transition from one steady-state convective mode to another in a porous box. Previous experimental and analytical studies of natural convective flow in an inclined porous layer...
Authors
Clifford Voss, Craig Simmons, Neville Robinson
Controls on groundwater flow in the Bengal Basin of India and Bangladesh: Regional modeling analysis Controls on groundwater flow in the Bengal Basin of India and Bangladesh: Regional modeling analysis
Groundwater for domestic and irrigation purposes is produced primarily from shallow parts of the Bengal Basin aquifer system (India and Bangladesh), which contains high concentrations of dissolved arsenic (exceeding worldwide drinking water standards), though deeper groundwater is generally low in arsenic. An essential first step for determining sustainable management of the deep...
Authors
H.A. Michael, C.I. Voss
Estimation of regional-scale groundwater flow properties in the Bengal Basin of India and Bangladesh Estimation of regional-scale groundwater flow properties in the Bengal Basin of India and Bangladesh
Quantitative evaluation of management strategies for long-term supply of safe groundwater for drinking from the Bengal Basin aquifer (India and Bangladesh) requires estimation of the large-scale hydrogeologic properties that control flow. The Basin consists of a stratified, heterogeneous sequence of sediments with aquitards that may separate aquifers locally, but evidence does not...
Authors
H.A. Michael, C.I. Voss
Science and Products
Filter Total Items: 78
Thermal and hydrological observations near Twelvemile Lake in discontinuous permafrost, Yukon Flats, interior Alaska, September 2010-August 2011 Thermal and hydrological observations near Twelvemile Lake in discontinuous permafrost, Yukon Flats, interior Alaska, September 2010-August 2011
A series of ground-based observations were made between September 2010 and August 2011 near Twelvemile Lake, 19 kilometers southwest of Fort Yukon, Alaska, for use in ongoing hydrological analyses of watersheds in this region of discontinuous permafrost. Measurements include depth to ground ice, depth to water table, soil texture, soil moisture, soil temperature, and water pressure above...
Authors
Steven Jepsen, Joshua Koch, Joshua Rose, Clifford Voss, Michelle Walvoord
Glaciation and regional groundwater flow in the Fennoscandian shield Glaciation and regional groundwater flow in the Fennoscandian shield
Regional-scale groundwater flow modeling of the Fennoscandian shield suggests that groundwater flow can be strongly affected by future climate change and glaciation. We considered variable-density groundwater flow in a 1500-km-long and approximately 10-km-deep cross-section through southern Sweden. Groundwater flow and shield brine transport in the cross-sectional model were analyzed...
Authors
A.M. Provost, C.I. Voss, C. E. Neuzil
Modeling radium distribution in coastal aquifers during sea level changes: The Dead Sea case Modeling radium distribution in coastal aquifers during sea level changes: The Dead Sea case
We present a new approach to studying the behavior of radium isotopes in a coastal aquifer. In order to simulate radium isotope distributions in the dynamic flow field of the Dead Sea aquifer, a multi-species density dependent flow model (SUTRA-MS) was used. Field data show that the activity of 226Ra decreases from 140 to 60 dpm/L upon entering the aquifer from the Dead Sea, and then...
Authors
Yael Kiro, Yoseph Yechieli, Clifford Voss, Abraham Starinsky, Yishai Weinstein
Airborne electromagnetic imaging of discontinuous permafrost Airborne electromagnetic imaging of discontinuous permafrost
The evolution of permafrost in cold regions is inextricably connected to hydrogeologic processes, climate, and ecosystems. Permafrost thawing has been linked to changes in wetland and lake areas, alteration of the groundwater contribution to streamflow, carbon release, and increased fire frequency. But detailed knowledge about the dynamic state of permafrost in relation to surface and...
Authors
B. J. Minsley, J.D. Abraham, B. Smith, J. Cannia, C.I. Voss, M.T. Jorgenson, Michelle Walvoord, B.K. Wylie, L. Anderson, L.B. Ball, M. Deszcz-Pan, T.P. Wellman, T. Ager
Exchange of Groundwater and Surface-Water Mediated by Permafrost Response to Seasonal and Long Term Air Temperature Variation Exchange of Groundwater and Surface-Water Mediated by Permafrost Response to Seasonal and Long Term Air Temperature Variation
Permafrost dynamics impact hydrologic cycle processes by promoting or impeding groundwater and surface water exchange. Under seasonal and decadal air temperature variations, permafrost temperature changes control the exchanges between groundwater and surface water. A coupled heat transport and groundwater flow model, SUTRA, was modified to simulate groundwater flow and heat transport in...
Authors
Shemin Ge, Jeffrey McKenzie, Clifford Voss, Qingbai Wu
Exchange of groundwater and surface-water mediated by permafrost response to seasonal and long term air temperature variation Exchange of groundwater and surface-water mediated by permafrost response to seasonal and long term air temperature variation
Permafrost dynamics impact hydrologic cycle processes by promoting or impeding groundwater and surface water exchange. Under seasonal and decadal air temperature variations, permafrost temperature changes control the exchanges between groundwater and surface water. A coupled heat transport and groundwater flow model, SUTRA, was modified to simulate groundwater flow and heat transport in...
Authors
S. Ge, J. McKenzie, C. Voss, Q. Wu
Airborne electromagnetic and magnetic geophysical survey data of the Yukon Flats and Fort Wainwright areas, central Alaska, June 2010 Airborne electromagnetic and magnetic geophysical survey data of the Yukon Flats and Fort Wainwright areas, central Alaska, June 2010
In June 2010, the U.S. Geological Survey conducted airborne electromagnetic and magnetic surveys of the Yukon Flats and Fort Wainwright study areas in central Alaska. These data were collected to estimate the three-dimensional distribution of permafrost at the time of the survey. These data were also collected to evaluate the effectiveness of these geophysical methods at mapping...
Authors
Lyndsay Ball, Bruce Smith, Burke Minsley, Jared D. Abraham, Clifford Voss, Beth Astley, Maria Deszcz-Pan, James Cannia
Editor’s message: Groundwater modeling fantasies - Part 1, adrift in the details Editor’s message: Groundwater modeling fantasies - Part 1, adrift in the details
Fools ignore complexity. Pragmatists suffer it. Some can avoid it. Geniuses remove it. …Simplicity does not precede complexity, but follows it. (Epigrams in Programming by Alan Perlis, a computer scientist; Perlis 1982). A doctoral student creating a groundwater model of a regional aquifer put individual circular regions around data points where he had hydraulic head measurements, so...
Authors
Clifford Voss
Editor’s message: Groundwater modeling fantasies - Part 2, down to earth Editor’s message: Groundwater modeling fantasies - Part 2, down to earth
Simplicity is the final achievement. After one has played a vast quantity of notes and more notes, it is simplicity that emerges as the crowning reward of art. (Frédéric Chopin, a musician and composer, quoted in If Not God, Then What? by Fost 2007) Despite the dubious developments discussed in part 1 of this Editor’s Message (Voss 2011), groundwater modeling really does represent the...
Authors
Clifford Voss
Three-dimensional benchmark for variable-density flow and transport simulation: matching semi-analytic stability modes for steady unstable convection in an inclined porous box Three-dimensional benchmark for variable-density flow and transport simulation: matching semi-analytic stability modes for steady unstable convection in an inclined porous box
This benchmark for three-dimensional (3D) numerical simulators of variable-density groundwater flow and solute or energy transport consists of matching simulation results with the semi-analytical solution for the transition from one steady-state convective mode to another in a porous box. Previous experimental and analytical studies of natural convective flow in an inclined porous layer...
Authors
Clifford Voss, Craig Simmons, Neville Robinson
Controls on groundwater flow in the Bengal Basin of India and Bangladesh: Regional modeling analysis Controls on groundwater flow in the Bengal Basin of India and Bangladesh: Regional modeling analysis
Groundwater for domestic and irrigation purposes is produced primarily from shallow parts of the Bengal Basin aquifer system (India and Bangladesh), which contains high concentrations of dissolved arsenic (exceeding worldwide drinking water standards), though deeper groundwater is generally low in arsenic. An essential first step for determining sustainable management of the deep...
Authors
H.A. Michael, C.I. Voss
Estimation of regional-scale groundwater flow properties in the Bengal Basin of India and Bangladesh Estimation of regional-scale groundwater flow properties in the Bengal Basin of India and Bangladesh
Quantitative evaluation of management strategies for long-term supply of safe groundwater for drinking from the Bengal Basin aquifer (India and Bangladesh) requires estimation of the large-scale hydrogeologic properties that control flow. The Basin consists of a stratified, heterogeneous sequence of sediments with aquitards that may separate aquifers locally, but evidence does not...
Authors
H.A. Michael, C.I. Voss