Groundwater conditions during 2009 and changes in groundwater levels from 1984 to 2009, Columbia Plateau Regional Aquifer System, Washington, Oregon, and Idaho

Snyder, Daniel T.; Haynes, Jonathan V.

doi:10.3133/sir20105040

Cited by 6 publications

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References 3 publications

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“…Changes in lithology associated with folds and faults also affect flow paths through the CPRAS by forming flow barriers or preferential pathways for groundwater flow (Newcomb ; Porcello et al . ; Snyder & Haynes ; Kahle et al . ; Burns et al .…”

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confidence: 99%

Understanding heat and groundwater flow through continental flood basalt provinces: insights gained from alternative models of permeability/depth relationships for the Columbia Plateau, USA

et al. 2014

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Heat-flow mapping of the western USA has identified an apparent low-heat-flow anomaly coincident with the Columbia Plateau Regional Aquifer System, a thick sequence of basalt aquifers within the Columbia River Basalt Group (CRBG). A heat and mass transport model (SUTRA) was used to evaluate the potential impact of groundwater flow on heat flow along two different regional groundwater flow paths. Limited in situ permeability (k) data from the CRBG are compatible with a steep permeability decrease (approximately 3.5 orders of magnitude) at 600-900 m depth and approximately 40°C. Numerical simulations incorporating this permeability decrease demonstrate that regional groundwater flow can explain lower-than-expected heat flow in these highly anisotropic (k x /k z~1 0 4 ) continental flood basalts. Simulation results indicate that the abrupt reduction in permeability at approximately 600 m depth results in an equivalently abrupt transition from a shallow region where heat flow is affected by groundwater flow to a deeper region of conduction-dominated heat flow. Most existing heat-flow measurements within the CRBG are from shallower than 600 m depth or near regional groundwater discharge zones, so that heat-flow maps generated using these data are likely influenced by groundwater flow. Substantial k decreases at similar temperatures have also been observed in the volcanic rocks of the adjacent Cascade Range volcanic arc and at Kilauea Volcano, Hawaii, where they result from low-temperature hydrothermal alteration.

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Section: Introductionmentioning

confidence: 99%

Understanding heat and groundwater flow through continental flood basalt provinces: insights gained from alternative models of permeability/depth relationships for the Columbia Plateau, USA

et al. 2014

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“…: Relationship between the geology and hydrogeology in the Portland Basin (Conlon et al 2005 The conversion is accurate to +/-0.5 feet (Snyder and Haynes 2010).…”

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Precipitation Impacts on Groundwater Levels in the Ephemeral Holgate Lake: A MODFLOW Inquiry

Cervarich¹

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ii ACKNOWLEDGMENTS Dr. Johnson, for generously sharing her brain space and lab space. And for pulling me out of rabbit holes.Linley Mescher, for all the MODFLOW collaboration.PP and JMV, for the late night dinners and endless support.And to RC, for keeping the lights on.iii ABSTRACT Holgate Lake, an ephemeral lake located in southeast Portland, has a history of flooding and inundating residential areas. The appearance of the lake is hypothesized to be a function of precipitation-driven changes in groundwater levels. A model was developed using MODFLOW-NWT, a U.S. Geological Survey (USGS) modular hydrologic program, to analyze parameters contributing to the appearance of the lake. The model was most sensitive to changes in aquifer properties including hydraulic conductivity and storativity. The model displayed low sensitivity to changes in precipitation, evapotranspiration, and conductance of surface waters. Results from the analysis contribute to a better understanding of the surface-groundwater system, and could be used to assess flooding risks in the Holgate Lake area with additional model calibration.iv

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2012

Crustal Permeability

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A simple predictive model of quartz solubility in water-salt-C02 systems at temperatures up to 1000 ∘ C and pressures up to 1000 MPa. Geochimica Cosmochimica Acta, 76, 1597-1608. Allen DM, Grasby SE, Voormeij DA (2006) Determining the circulation depth of thermal springs in the southern Rocky Mountain Trench, southeastern British Columbia, Canada using geothermometry and borehole temperature logs.

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Groundwater conditions during 2009 and changes in groundwater levels from 1984 to 2009, Columbia Plateau Regional Aquifer System, Washington, Oregon, and Idaho

Cited by 6 publications

References 3 publications

Understanding heat and groundwater flow through continental flood basalt provinces: insights gained from alternative models of permeability/depth relationships for the Columbia Plateau, USA

Understanding heat and groundwater flow through continental flood basalt provinces: insights gained from alternative models of permeability/depth relationships for the Columbia Plateau, USA

Precipitation Impacts on Groundwater Levels in the Ephemeral Holgate Lake: A MODFLOW Inquiry

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