Paul Hsieh (Former Employee)
Science and Products
Filter Total Items: 67
Integrated multi‐scale characterization of ground‐water flow and chemical transport in fractured crystalline rock at the Mirror Lake Site, New Hampshire
This chapter contains sections titled:IntroductionMirror Lake SiteFractures and Geologic MappingHydraulic Properties of Fractured Rock From Meters to KilometersChemical Migration in Fractured RockFracture Controls on Ground‐Water Flow and Chemical Transport at the Mirror Lake SiteSummary
Authors
Allen M. Shapiro, Paul A. Hsieh, William C. Burton, Gregory J. Walsh
Hydrothermal fluid flow and deformation in large calderas: Inferences from numerical simulations
[1] Inflation and deflation of large calderas is traditionally interpreted as being induced by volume change of a discrete source embedded in an elastic or viscoelastic half-space, though it has also been suggested that hydrothermal fluids may play a role. To test the latter hypothesis, we carry out numerical simulations of hydrothermal fluid flow and poroelastic deformation in calderas by couplin
Authors
Shaul Hurwitz, L.B. Christiansen, Paul A. Hsieh
Determining anisotropic transmissivity using a simplified Papadopulos method
The straight-line method presented by Papadopulos requires a minimum of three observation wells for determining the transmissivity tensor of a homogeneous and anisotropic aquifer. A simplification of this method was developed for fractured aquifers where the principal directions of the transmissivity tensor are known prior to implementation, such as when fracture patterns on outcropping portions o
Authors
V.M. Heilweil, P. A. Hsieh
Seasonal seismicity at western United States volcanic centers
We examine 20-yr data sets of seismic activity from 10 volcanic areas in the western United States for annual periodic signals (seasonality), focusing on large calderas (Long Valley caldera and Yellowstone) and stratovolcanoes (Cascade Range). We apply several statistical methods to test for seasonality in the seismic catalogs. In 4 of the 10 regions, statistically significant seasonal modulation
Authors
L.B. Christiansen, S. Hurwitz, M.O. Saar, S. E. Ingebritsen, P. A. Hsieh
SVFlux and ChemFlux: Software for two-dimensional/three-dimensional finite element variably saturated flow and transport modeling
SVFlux and ChemFlux are a pair of finite element models designed to simulate the movement of water and contaminants in two and three dimensions under variably saturated conditions. The transport simulator ChemFlux is designed as a companion to the flow simulator SVFlux. SVFlux and ChemFlux are commercial products developed by SoilVision Systems Ltd. and can be purchased via the company's Web site.
Authors
Chunmiao Zheng, Paul A. Hsieh, Shawn Matott
Evaluation of longitudinal dispersivity estimates from simulated forced‐ and natural‐gradient tracer tests in heterogeneous aquifers
We simulate three types of forced‐gradient tracer tests (converging radial flow, unequal strength two well, and equal strength two well) and natural‐gradient tracer tests in multiple realizations of heterogeneous two‐dimensional aquifers with a hydraulic conductivity distribution characterized by a spherical variogram. We determine longitudinal dispersivities (αL) by analysis of forced‐gradient te
Authors
Claire R. Tiedeman, Paul A. Hsieh
User's guide to Model Viewer, a program for three-dimensional visualization of ground-water model results
Model Viewer is a computer program that displays the results of three-dimensional groundwater models. Scalar data (such as hydraulic head or solute concentration) may be displayed as a solid or a set of isosurfaces, using a red-to-blue color spectrum to represent a range of scalar values. Vector data (such as velocity or specific discharge) are represented by lines oriented to the vector direction
Authors
Paul A. Hsieh, Richard B. Winston
Evaluation of longitudinal dispersivity estimates from forced-gradient tracer tests in heterogeneous aquifers
Converging radial-flow and two-well tracer tests are simulated in two-dimensional aquifers to investigate the effects of heterogeneity and forced-gradient test configuration on longitudinal dispersivity (??L) estimates, and to compare ??L estimates from forced-gradient tests with ??L values that characterize solute spreading under natural-gradient flow. Results indicate that in both mildly and hig
Authors
C. R. Tiedeman, P. A. Hsieh
Crosswell seismic investigation of hydraulically conductive, fracture bedrock near Mirror Lake, New Hampshire
Near Mirror Lake, New Hampshire (USA), hydraulically conductive, fractured bedrock was investigated with the crosswell seismic method to determine whether this method could provide any information about hydraulic conductivity between wells. To this end, crosswell seismic data, acoustic logs from boreholes, image logs from boreholes, and single borehole hydraulic tests were analyzed. The analysis s
Authors
K.J. Ellefsen, P. A. Hsieh, A.M. Shapiro
Evaluation of longitudinal dispersivity estimates from forced-gradient tracer tests in heterogeneous aquifers
Converging radial-flow and two-well tracer tests are simulated in two-dimensional aquifers to investigate the effects of heterogeneity and forced-gradient test configuration on longitudinal dispersivity (??L) estimates, and to compare ??L estimates from forced-gradient tests with ??L values that characterize solute spreading under natural-gradient flow. Results indicate that in mildly heterogeneou
Authors
C. R. Tiedeman, P. A. Hsieh
TopoDrive and ParticleFlow--Two computer models for simulation and visualization of ground-water flow and transport of fluid particles in two dimensions
This report serves as a user?s guide for two computer models: TopoDrive and ParticleFlow. These two-dimensional models are designed to simulate two ground-water processes: topography-driven flow and advective transport of fluid particles. To simulate topography-driven flow, the user may specify the shape of the water table, which bounds the top of the vertical flow section. To simulate transport o
Authors
Paul A. Hsieh
MODFLOW-2000, the U.S. Geological Survey modular ground-water model: User guide to the LMT6 package, the linkage with MT3DMS for multi-species mass transport modeling
MODFLOW-2000, the newest version of MODFLOW, is a computer program that numerically solves the three-dimensional ground-water flow equation for a porous medium using a finite-difference method. MT3DMS, the successor to MT3D, is a computer program for modeling multi-species solute transport in three-dimensional ground-water systems using multiple solution techniques, including the finite-difference
Authors
Chunmiao Zheng, Mary Catherine Hill, Paul A. Hsieh
Non-USGS Publications**
Montgomery-Brown, E. K., Shelly, D. R., & Hsieh, P. A., 2019, Snowmelt-triggered earthquake swarms at the margin of Long Valley Caldera, California, Geophysical Research Letters, 46. https://doi.org/10.1029/2019GL082254.
National Research Council. 2001. Conceptual Models of Flow and Transport in the Fractured Vadose Zone. Washington, DC: The National Academies Press. https://doi.org/10.17226/10102.
Committee on Fracture Characterization and Fluid Flow, 1996, Rock Fractures and Fluid Flow, Contemporary Understanding and Applications: Washington D.C., National Academy Press, 551 p.
Poroelasticity simulation of ground-water flow and subsurface deformation; Simulation of deformation of sediments from decline of ground-water levels in an aquifer underlain by a bedrock step
Ritzi, R.W., Jr., Sorooshian, S., and Hsieh, P.A., 1991, The estimation of fluid flow properties from the response of water levels in wells to the combined atmospheric and earth tide forces: Water Resources Research, v. 27, no. 5, p. 883-893.
Barton, C.C., and Hsieh, P.A., 1989, Physical and hydrologic-flow properties of fractures, Field Trip Guidebook T385, 28th International Geologic Congress: American Geophysical Union, Washington, D. C., 36 p.
Hsieh, P.A., Bredehoeft, J.D., and Farr, J.M, 1987, Determination of aquifer transmissivity from earth tide analysis: Water Resources Research, v. 23, no. 10, p. 1824-1832.
Hsieh, P.A., Neuman, S.P., and Simpson, E.S., 1983, Pressure testing of fractured rocks--a methodology employing three-dimensional cross-hole tests: U. S. Nuclear Regulatory Commission Topical Report NUREG/CR- 3213, 176 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 67
Integrated multi‐scale characterization of ground‐water flow and chemical transport in fractured crystalline rock at the Mirror Lake Site, New Hampshire
This chapter contains sections titled:IntroductionMirror Lake SiteFractures and Geologic MappingHydraulic Properties of Fractured Rock From Meters to KilometersChemical Migration in Fractured RockFracture Controls on Ground‐Water Flow and Chemical Transport at the Mirror Lake SiteSummary
Authors
Allen M. Shapiro, Paul A. Hsieh, William C. Burton, Gregory J. Walsh
Hydrothermal fluid flow and deformation in large calderas: Inferences from numerical simulations
[1] Inflation and deflation of large calderas is traditionally interpreted as being induced by volume change of a discrete source embedded in an elastic or viscoelastic half-space, though it has also been suggested that hydrothermal fluids may play a role. To test the latter hypothesis, we carry out numerical simulations of hydrothermal fluid flow and poroelastic deformation in calderas by couplin
Authors
Shaul Hurwitz, L.B. Christiansen, Paul A. Hsieh
Determining anisotropic transmissivity using a simplified Papadopulos method
The straight-line method presented by Papadopulos requires a minimum of three observation wells for determining the transmissivity tensor of a homogeneous and anisotropic aquifer. A simplification of this method was developed for fractured aquifers where the principal directions of the transmissivity tensor are known prior to implementation, such as when fracture patterns on outcropping portions o
Authors
V.M. Heilweil, P. A. Hsieh
Seasonal seismicity at western United States volcanic centers
We examine 20-yr data sets of seismic activity from 10 volcanic areas in the western United States for annual periodic signals (seasonality), focusing on large calderas (Long Valley caldera and Yellowstone) and stratovolcanoes (Cascade Range). We apply several statistical methods to test for seasonality in the seismic catalogs. In 4 of the 10 regions, statistically significant seasonal modulation
Authors
L.B. Christiansen, S. Hurwitz, M.O. Saar, S. E. Ingebritsen, P. A. Hsieh
SVFlux and ChemFlux: Software for two-dimensional/three-dimensional finite element variably saturated flow and transport modeling
SVFlux and ChemFlux are a pair of finite element models designed to simulate the movement of water and contaminants in two and three dimensions under variably saturated conditions. The transport simulator ChemFlux is designed as a companion to the flow simulator SVFlux. SVFlux and ChemFlux are commercial products developed by SoilVision Systems Ltd. and can be purchased via the company's Web site.
Authors
Chunmiao Zheng, Paul A. Hsieh, Shawn Matott
Evaluation of longitudinal dispersivity estimates from simulated forced‐ and natural‐gradient tracer tests in heterogeneous aquifers
We simulate three types of forced‐gradient tracer tests (converging radial flow, unequal strength two well, and equal strength two well) and natural‐gradient tracer tests in multiple realizations of heterogeneous two‐dimensional aquifers with a hydraulic conductivity distribution characterized by a spherical variogram. We determine longitudinal dispersivities (αL) by analysis of forced‐gradient te
Authors
Claire R. Tiedeman, Paul A. Hsieh
User's guide to Model Viewer, a program for three-dimensional visualization of ground-water model results
Model Viewer is a computer program that displays the results of three-dimensional groundwater models. Scalar data (such as hydraulic head or solute concentration) may be displayed as a solid or a set of isosurfaces, using a red-to-blue color spectrum to represent a range of scalar values. Vector data (such as velocity or specific discharge) are represented by lines oriented to the vector direction
Authors
Paul A. Hsieh, Richard B. Winston
Evaluation of longitudinal dispersivity estimates from forced-gradient tracer tests in heterogeneous aquifers
Converging radial-flow and two-well tracer tests are simulated in two-dimensional aquifers to investigate the effects of heterogeneity and forced-gradient test configuration on longitudinal dispersivity (??L) estimates, and to compare ??L estimates from forced-gradient tests with ??L values that characterize solute spreading under natural-gradient flow. Results indicate that in both mildly and hig
Authors
C. R. Tiedeman, P. A. Hsieh
Crosswell seismic investigation of hydraulically conductive, fracture bedrock near Mirror Lake, New Hampshire
Near Mirror Lake, New Hampshire (USA), hydraulically conductive, fractured bedrock was investigated with the crosswell seismic method to determine whether this method could provide any information about hydraulic conductivity between wells. To this end, crosswell seismic data, acoustic logs from boreholes, image logs from boreholes, and single borehole hydraulic tests were analyzed. The analysis s
Authors
K.J. Ellefsen, P. A. Hsieh, A.M. Shapiro
Evaluation of longitudinal dispersivity estimates from forced-gradient tracer tests in heterogeneous aquifers
Converging radial-flow and two-well tracer tests are simulated in two-dimensional aquifers to investigate the effects of heterogeneity and forced-gradient test configuration on longitudinal dispersivity (??L) estimates, and to compare ??L estimates from forced-gradient tests with ??L values that characterize solute spreading under natural-gradient flow. Results indicate that in mildly heterogeneou
Authors
C. R. Tiedeman, P. A. Hsieh
TopoDrive and ParticleFlow--Two computer models for simulation and visualization of ground-water flow and transport of fluid particles in two dimensions
This report serves as a user?s guide for two computer models: TopoDrive and ParticleFlow. These two-dimensional models are designed to simulate two ground-water processes: topography-driven flow and advective transport of fluid particles. To simulate topography-driven flow, the user may specify the shape of the water table, which bounds the top of the vertical flow section. To simulate transport o
Authors
Paul A. Hsieh
MODFLOW-2000, the U.S. Geological Survey modular ground-water model: User guide to the LMT6 package, the linkage with MT3DMS for multi-species mass transport modeling
MODFLOW-2000, the newest version of MODFLOW, is a computer program that numerically solves the three-dimensional ground-water flow equation for a porous medium using a finite-difference method. MT3DMS, the successor to MT3D, is a computer program for modeling multi-species solute transport in three-dimensional ground-water systems using multiple solution techniques, including the finite-difference
Authors
Chunmiao Zheng, Mary Catherine Hill, Paul A. Hsieh
Non-USGS Publications**
Montgomery-Brown, E. K., Shelly, D. R., & Hsieh, P. A., 2019, Snowmelt-triggered earthquake swarms at the margin of Long Valley Caldera, California, Geophysical Research Letters, 46. https://doi.org/10.1029/2019GL082254.
National Research Council. 2001. Conceptual Models of Flow and Transport in the Fractured Vadose Zone. Washington, DC: The National Academies Press. https://doi.org/10.17226/10102.
Committee on Fracture Characterization and Fluid Flow, 1996, Rock Fractures and Fluid Flow, Contemporary Understanding and Applications: Washington D.C., National Academy Press, 551 p.
Poroelasticity simulation of ground-water flow and subsurface deformation; Simulation of deformation of sediments from decline of ground-water levels in an aquifer underlain by a bedrock step
Ritzi, R.W., Jr., Sorooshian, S., and Hsieh, P.A., 1991, The estimation of fluid flow properties from the response of water levels in wells to the combined atmospheric and earth tide forces: Water Resources Research, v. 27, no. 5, p. 883-893.
Barton, C.C., and Hsieh, P.A., 1989, Physical and hydrologic-flow properties of fractures, Field Trip Guidebook T385, 28th International Geologic Congress: American Geophysical Union, Washington, D. C., 36 p.
Hsieh, P.A., Bredehoeft, J.D., and Farr, J.M, 1987, Determination of aquifer transmissivity from earth tide analysis: Water Resources Research, v. 23, no. 10, p. 1824-1832.
Hsieh, P.A., Neuman, S.P., and Simpson, E.S., 1983, Pressure testing of fractured rocks--a methodology employing three-dimensional cross-hole tests: U. S. Nuclear Regulatory Commission Topical Report NUREG/CR- 3213, 176 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.