Michael Cardiff
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View article: Multi‐Frequency Oscillatory Hydraulic Tomography Improves Heterogeneity Imaging and Resolution and Reduces Uncertainty
Multi‐Frequency Oscillatory Hydraulic Tomography Improves Heterogeneity Imaging and Resolution and Reduces Uncertainty Open
Understanding subsurface heterogeneity is crucial to predicting groundwater flow pathways, mixing, and other processes in aquifers and other fluid reservoirs. Despite significant effort developing geophysical tools to understand this heter…
View article: Microseismicity Modulation Due To Changes in Geothermal Production at San Emidio, Nevada, USA
Microseismicity Modulation Due To Changes in Geothermal Production at San Emidio, Nevada, USA Open
Brief cessations of geothermal production can induce seismicity, a phenomenon that has drawn increasing attention in recent years. Such observations are rare, and the underlying mechanism requires careful analysis. In April 2022, a dense s…
View article: Where has hydrogeologic science been, and where is it going? Research trends in hydrogeology publishing over the past 60 years
Where has hydrogeologic science been, and where is it going? Research trends in hydrogeology publishing over the past 60 years Open
Quantifying historical research trends in the field of hydrogeology is not only generally informative for hydrogeologists but is essential for fostering interdisciplinary collaboration and assessing the relationship between academic study …
View article: The Bredehoeft Problem: Verifying Accuracy of Linearized Salvage Evaluation in Water Table Aquifers due to Groundwater Pumping
The Bredehoeft Problem: Verifying Accuracy of Linearized Salvage Evaluation in Water Table Aquifers due to Groundwater Pumping Open
In water table aquifers, evapotranspiration can be reduced due to the groundwater pumping. These changes must be evaluated to assess how much water can be used for groundwater withdrawals. Although this salvage phenomenon was well understo…
View article: Stiff, Smooth, and Solid? Complex Fracture Hydraulics' Imprint on Oscillatory Hydraulic Testing
Stiff, Smooth, and Solid? Complex Fracture Hydraulics' Imprint on Oscillatory Hydraulic Testing Open
Fractured bedrock aquifers, especially deep aquifers, represent increasingly common targets for waste storage and alternative energy development, necessitating detailed quantitative descriptions of fracture hydraulic properties, geometry, …
View article: Do Simple Analytical Models Capture Complex Fractured Bedrock Hydraulics? Oscillatory Flow Tests Suggest Not
Do Simple Analytical Models Capture Complex Fractured Bedrock Hydraulics? Oscillatory Flow Tests Suggest Not Open
Fractured sedimentary bedrock aquifers represent complex flow systems that may contain fast, fracture‐dominated flow paths and slower, porous media‐dominated flow paths. Thus, characterizing the dynamics of flow and transport through these…
View article: WHOLESCALE: Coordinates of wells at San Emidio, Nevada
WHOLESCALE: Coordinates of wells at San Emidio, Nevada Open
This dataset includes position coordinates and elevation information for wells at the WHOLESCALE San Emidio project location. Well positions in the attached file are characterized by UTM coordinates (Easting, Northing) in meters, and WHOLE…
View article: Statistical analysis of aquifer hydraulic properties by a continuous pumping tomography test: Application to the Boise Hydrogeophysical Research Site
Statistical analysis of aquifer hydraulic properties by a continuous pumping tomography test: Application to the Boise Hydrogeophysical Research Site Open
This study presents a new approach for statistical analysis of equivalent hydraulic properties (conductivity, specific storage and specific yield). Method is applied to tomographic pumping test data from the Boise aquifer to find mean and …
View article: Quantifying Annual Nitrogen Loss to Groundwater Via Edge‐of‐Field Monitoring: Method and Application
Quantifying Annual Nitrogen Loss to Groundwater Via Edge‐of‐Field Monitoring: Method and Application Open
Increased nitrate concentrations in groundwater and surface waters represent one of the most widespread and acute impacts of modern agriculture on the environment. However, there is often a fundamental gap in understanding how individual a…
View article: Oscillatory Flow Testing Data Collected at Field Site for Research in Fractured Sedimentary Rock (FSR)^2
Oscillatory Flow Testing Data Collected at Field Site for Research in Fractured Sedimentary Rock (FSR)^2 Open
This dataset contains raw and processed pressure data collected in 2019 during oscillatory flow testing experiments at the Field Site for Research in Fractured Sedimentary Rock (FSR)^2 near Madison, WI. The included ReadMe file describes t…
View article: Oscillatory Flow Testing Data Collected at Field Site for Research in Fractured Sedimentary Rock (FSR)^2
Oscillatory Flow Testing Data Collected at Field Site for Research in Fractured Sedimentary Rock (FSR)^2 Open
This dataset contains raw and processed pressure data collected in 2019 during oscillatory flow testing experiments at the Field Site for Research in Fractured Sedimentary Rock (FSR)^2 near Madison, WI. The included ReadMe file describes t…
View article: Aquifer Characterization and Uncertainty in <scp>Multi‐Frequency</scp> Oscillatory Flow Tests: Approach and Insights
Aquifer Characterization and Uncertainty in <span>Multi‐Frequency</span> Oscillatory Flow Tests: Approach and Insights Open
Characterizing aquifer properties and their associated uncertainty remains a fundamental challenge in hydrogeology. Recent studies demonstrate the use of oscillatory flow interference testing to characterize effective aquifer flow properti…
View article: Time‐Series Analysis of Volume Change at Brady Hot Springs, Nevada, USA, Using Geodetic Data From 2003–2018
Time‐Series Analysis of Volume Change at Brady Hot Springs, Nevada, USA, Using Geodetic Data From 2003–2018 Open
Brady Hot Springs geothermal field has exhibited subsidence, as measured by interferometric synthetic aperture radar (InSAR). Previous studies have examined both the temporal evolution of the deformation from 2004 through 2016 and the spat…
View article: Geodetic Measurements and Numerical Models of Deformation at Coso Geothermal Field, California, USA, 2004–2016
Geodetic Measurements and Numerical Models of Deformation at Coso Geothermal Field, California, USA, 2004–2016 Open
We measure transient deformation at Coso geothermal field using interferometric synthetic aperture radar (InSAR) data acquired between 2004 and 2016 and relative positions estimated from global positioning system (GPS) to quantify relation…
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View article: Spatio–Temporal Analysis of Deformation at San Emidio Geothermal Field, Nevada, USA Between 1992 and 2010
Spatio–Temporal Analysis of Deformation at San Emidio Geothermal Field, Nevada, USA Between 1992 and 2010 Open
Although subsidence has been observed at the San Emidio geothermal field in Nevada using interferometric synthetic aperture radar since the early 1990s, the spatial extent and temporal evolution of the subsidence have not heretofore been q…
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View article: Characterizing volumetric strain at Brady Hot Springs, Nevada, USA using geodetic data, numerical models and prior information
Characterizing volumetric strain at Brady Hot Springs, Nevada, USA using geodetic data, numerical models and prior information Open
The geothermal field at Brady Hot Springs, Nevada has subsided over the past decade. Between 2004 and 2014, the rate of downward-vertical displacement was on the order of 10 mm yr-1, as measured by two independent geodetic techniques: inte…
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including physical, chemical, biological, and ecological processes in water resources research and management, including social, policy, and public health implications.It encompasses observational, experimental, theoretical, analytical, nu…
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role of water in the Earth system, including physical, chemical, biological, and ecological processes in water resources research and management, including social, policy, and public health implications.It encompasses observational, experi…
View article: Interpreting the Hydraulic Connectivity within a Karstic Field through the Utilization of a Harmonic Pumping Tomography to Image the Distribution of Properties in a Model
Interpreting the Hydraulic Connectivity within a Karstic Field through the Utilization of a Harmonic Pumping Tomography to Image the Distribution of Properties in a Model Open
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