Search Results - "Keating, Kristina"

A laboratory study to estimate pore geometric parameters of sandstones using complex conductivity and nuclear magnetic resonance for permeability prediction by Osterman, Gordon, Keating, Kristina, Binley, Andrew, Slater, Lee

“…We estimate parameters from the Katz and Thompson permeability model using laboratory complex electrical conductivity (CC) and nuclear magnetic resonance (NMR)…”
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The role of peat-forming bofedales in sustaining baseflow in the humid puna by Wunderlich, Wyeth, Lang, Margaret, Keating, Kristina, Perez, Wilner Bandera, Oshun, Jasper

“…Humid puna of the Central Andes, Perú Bofedales, or peat-forming wetlands, are a characteristic feature of the humid puna - a high elevation, seasonally dry…”
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Interdisciplinary Water Development in the Peruvian Highlands: The Case for Including the Coproduction of Knowledge in Socio-Hydrology by Oshun, Jasper, Keating, Kristina, Lang, Margaret, Miraya Oscco, Yojana

“…Agrarian communities in the Peruvian Andes depend on local water resources that are threatened by both a changing climate and changes in the socio-politics of…”
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Nuclear magnetic resonance relaxation measurements as a means of monitoring iron mineralization processes by Keating, Kristina, Knight, Rosemary, Tufano, Katharine J.

“…In this laboratory study, we assessed the measurement of nuclear magnetic resonance (NMR) relaxation times as a means of monitoring iron mineralization…”
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A Review of the Principles and Applications of the NMR Technique for Near-Surface Characterization by Behroozmand, Ahmad A., Keating, Kristina, Auken, Esben

“…This paper presents a comprehensive review of the recent advances in nuclear magnetic resonance (NMR) measurements for near-surface characterization using…”
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The effect of magnetic susceptibility and magnetic field strength on porosity estimates determined from low-field nuclear magnetic resonance by Keating, Kristina, Walsh, David O., Grunewald, Elliot

“…The presence of materials with high magnetic susceptibility are known to have an impact on 1H nuclear magnetic resonance (NMR) measurements and in laboratory…”
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A laboratory study to determine the effect of surface area and bead diameter on NMR relaxation rates of glass bead packs by Keating, Kristina

“…ABSTRACT A laboratory study was conducted to explore the relationship between pore size, pore surface‐area‐to‐volume ratio and NMR relaxation rates and to…”
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A laboratory study to determine the effect of pore size, surface relaxivity, and saturation on NMR T2 relaxation measurements by Falzone, Samuel, Keating, Kristina

“…ABSTRACT In this study, we present laboratory experiments investigating the effect of pore size and surface relaxivity ρ2 on the nuclear magnetic resonance…”
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A laboratory study to determine the effect of pore size, surface relaxivity, and saturation on NMR T 2 relaxation measurements by Falzone, Samuel, Keating, Kristina

“…ABSTRACT In this study, we present laboratory experiments investigating the effect of pore size and surface relaxivity on the nuclear magnetic resonance…”
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On Permeability Prediction From Complex Conductivity Measurements Using Polarization Magnitude and Relaxation Time by Robinson, Judith, Slater, Lee, Weller, Andreas, Keating, Kristina, Robinson, Tonian, Rose, Carla, Parker, Beth

“…Geophysical length scales determined from complex conductivity (CC) measurements can be used to estimate permeability k when the electrical formation factor F…”
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The effect of magnetic susceptibility and magnetic field strength on porosity estimates determined from low-field nuclear magnetic resonance by Keating, Kristina, Walsh, David O., Grunewald, Elliot

“…The presence of materials with high magnetic susceptibility are known to have an impact on 1H nuclear magnetic resonance (NMR) measurements and in laboratory…”
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NMR relaxation times for soil texture estimation in the laboratory: A comparison to the laser diffraction and sieve–pipette methods by Peng, Yonghui, Keating, Kristina, Myers, D. Brenton

“…Nuclear magnetic resonance (NMR) relaxation time (T2) distributions are well known to be linked to the pore size distribution and show promise as a method of…”
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Geophysical signatures of soil AFFF contamination from spectral induced polarization and low field nuclear magnetic resonance methods by Falzone, Samuel, Schaefer, Charles, Siegenthaler, Ethan, Keating, Kristina, Werkema, Dale, Slater, Lee D

“…Few field methods are available for characterizing source zones impacted with aqueous film forming foam (AFFF). Non-invasive geophysical characterization of…”
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A laboratory study of the effect of magnetite on NMR relaxation rates by Keating, Kristina, Knight, Rosemary

“…We conducted a laboratory study to measure the effect of magnetite concentration and grain size on proton nuclear magnetic resonance (NMR) relaxation rates of…”
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Combined Geophysical Measurements Provide Evidence for Unfrozen Water in Permafrost in the Adventdalen Valley in Svalbard by Keating, Kristina, Binley, Andrew, Bense, Victor, Van Dam, Remke L., Christiansen, Hanne H.

“…Quantifying the unfrozen water content of permafrost is critical for assessing impacts of surface warming on the reactivation of groundwater flow and release…”
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Automated optimization of spatial resolution for single‐sided NMR by Kiple, Lyndi, Ballenger, John, Keating, Kristina, Balachandra, Anagi M., Meldrum, Tyler

“…Single‐sided NMR instruments utilize inhomogeneous magnetic fields with strong gradients to nondestructively probe physical properties of materials. The…”
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Anomalous solute transport in saturated porous media: Relating transport model parameters to electrical and nuclear magnetic resonance properties by Swanson, Ryan D., Binley, Andrew, Keating, Kristina, France, Samantha, Osterman, Gordon, Day-Lewis, Frederick D., Singha, Kamini

“…The advection‐dispersion equation (ADE) fails to describe commonly observed non‐Fickian solute transport in saturated porous media, necessitating the use of…”
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Detecting unfrozen sediments below thermokarst lakes with surface nuclear magnetic resonance by Parsekian, Andrew D., Grosse, Guido, Walbrecker, Jan O., Müller-Petke, Mike, Keating, Kristina, Liu, Lin, Jones, Benjamin M., Knight, Rosemary

“…A talik is a layer or body of unfrozen ground that occurs in permafrost due to an anomaly in thermal, hydrological, or hydrochemical conditions. Information…”
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A numerical study of the relationship between NMR relaxation and permeability in sands and gravels by Dlubac, Katherine, Knight, Rosemary, Keating, Kristina

“…ABSTRACT The accuracy of NMR‐derived permeability estimates in sands and gravels are examined through simulations on numerical grain packs composed of uniform…”
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Direct geoelectrical evidence of mass transfer at the laboratory scale by Swanson, Ryan D., Singha, Kamini, Day-Lewis, Frederick D., Binley, Andrew, Keating, Kristina, Haggerty, Roy

“…Previous field‐scale experimental data and numerical modeling suggest that the dual‐domain mass transfer (DDMT) of electrolytic tracers has an observable…”
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