Search Results - "Halloran, Landon J.S."

Heat as a tracer to quantify processes and properties in the vadose zone: A review by Halloran, Landon J.S., Rau, Gabriel C., Andersen, Martin S.

“…Soil moisture and temperature are some of the most important controls for a wide variety of geochemical and ecological processes in the vadose zone (VZ). Soil…”
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Tracking chlorinated contaminants in the subsurface using compound-specific chlorine isotope analysis: A review of principles, current challenges and applications by Zimmermann, Jeremy, Halloran, Landon J.S., Hunkeler, Daniel

“…Many chlorinated hydrocarbons have gained notoriety as persistent organic pollutants in the environment. Engineered and natural remediation efforts require a…”
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AI tools such as ChatGPT will disrupt hydrology, too by Halloran, Landon J. S., Mhanna, Saeed, Brunner, Philip

“…Since its public release in late 2022, the artificial intelligence (AI) tool ChatGPT has generated considerable excitement and consternation. Many scientists,…”
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Controls on the persistence of aqueous-phase groundwater contaminants in the presence of reactive back-diffusion by Halloran, Landon J.S., Hunkeler, Daniel

“…The persistence of groundwater contaminants is influenced by several interacting processes. Physical, physico-chemical, and (bio-)chemical processes all…”
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Climate change impacts on groundwater discharge-dependent streamflow in an alpine headwater catchment by Halloran, Landon J S, Millwater, Jeremy, Hunkeler, Daniel, Arnoux, Marie

“…Climate change will have-and, in much of the world, is already having-a pronounced impact on alpine water resources. A deeper understanding of the future role…”
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Using machine learning and remote sensing to track land use/land cover changes due to armed conflict by Mhanna, Saeed, Halloran, Landon J.S., Zwahlen, François, Asaad, Ahmed Haj, Brunner, Philip

“…Armed conflicts have detrimental impacts on the environment, including land systems. The prevailing understanding of the relation between Land Use/Land Cover…”
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Opportunities and limitations of the ChatGPT Advanced Data Analysis plugin for hydrological analyses by Irvine, Dylan J., Halloran, Landon J. S., Brunner, Philip

“…Artificial intelligence (AI) tools, such as ChatGPT, have already changed the way that many industries operate. Much of the recent discussion surrounding AI…”
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Improving groundwater storage change estimates using time-lapse gravimetry with Gravi4GW by Halloran, Landon J.S.

“…Time-lapse gravimetry (repeat microgravity measurement) is a powerful tool for monitoring temporal mass distribution variations, including seasonal and…”
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Sorption- and diffusion-induced isotopic fractionation in chloroethenes by Halloran, Landon J.S., Vakili, Fatemeh, Wanner, Philipp, Shouakar-Stash, Orfan, Hunkeler, Daniel

“…Isotopic fractionation of groundwater contaminants can occur due to degradation, diffusion and sorption. Of these, only degradation has been extensively…”
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Characterizing seasonal groundwater storage in alpine catchments using time‐lapse gravimetry, water stable isotopes and water balance methods by Arnoux, Marie, Halloran, Landon J. S., Berdat, Eléonore, Hunkeler, Daniel

“…Alpine areas play a major role in water supply in downstream valleys by releasing water during warm and dry periods. However, the hydrogeology of alpine…”
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COMPEST, a PEST-COMSOL interface for inverse multiphysics modelling: Development and application to isotopic fractionation of groundwater contaminants by Halloran, Landon J.S., Brunner, Philip, Hunkeler, Daniel

“…In the geosciences, inverse problems, wherein observations corresponding to model outputs are known and model parameters are unknown, are commonplace. Many of…”
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Vertical groundwater storage properties and changes in confinement determined using hydraulic head response to atmospheric tides by Acworth, R. Ian, Rau, Gabriel C., Halloran, Landon J. S., Timms, Wendy A.

“…Accurate determination of groundwater state of confinement and compressible storage properties at vertical resolution over depth is notoriously difficult. We…”
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Characterising the dynamics of surface water-groundwater interactions in intermittent and ephemeral streams using streambed thermal signatures by Rau, Gabriel C., Halloran, Landon J.S., Cuthbert, Mark O., Andersen, Martin S., Acworth, R. Ian, Tellam, John H.

“…•Amplitude ratios of the daily temperature component at two different depths in the streambed can be used to distinguish dry from saturated…”
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An objective frequency domain method for quantifying confined aquifer compressible storage using Earth and atmospheric tides by Acworth, R. Ian, Halloran, Landon J. S., Rau, Gabriel C., Cuthbert, Mark O., Bernardi, Tony L.

“…The groundwater hydraulic head response to the worldwide and ubiquitous atmospheric tide at 2 cycles per day (cpd) is a direct function of confined aquifer…”
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Modelling of C/Cl isotopic behaviour during chloroethene biotic reductive dechlorination: Capabilities and limitations of simplified and comprehensive models by Badin, Alice, Braun, Fabian, Halloran, Landon J S, Maillard, Julien, Hunkeler, Daniel

“…Predicting the fate of chloroethenes in groundwater is essential when evaluating remediation strategies. Such predictions are expected to be more accurate when…”
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Investigation of the thermal regime and subsurface properties of a tidally affected, variably saturated streambed by Halloran, Landon J. S., Andersen, Martin S., Rau, Gabriel C.

“…Temperature and moisture content in the variably saturated subsurface are two of the most important physical parameters that govern a wide variety of…”
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Calculating water saturation from passive temperature measurements in near-surface sediments: Development of a semi-analytical model by Halloran, Landon J.S., Roshan, Hamid, Rau, Gabriel C., Andersen, Martin S.

“…•New model estimates water saturation from amplitude and phase of temperature signal.•Model derived from first-principles advection-conduction-dispersion…”
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Editorial: Advances and emerging methods in tracer hydrogeology by Schilling, Oliver S., Halloran, Landon J. S., Delottier, Hugo, Sano, Yuji, Therrien, Rene

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Improved spatial delineation of streambed properties and water fluxes using distributed temperature sensing by Halloran, Landon J. S., Roshan, Hamid, Rau, Gabriel C., Andersen, Martin S., Acworth, R. Ian

“…A new method was developed for analysing and delineating streambed water fluxes, flow conditions and hydraulic properties using coiled fibre‐optic distributed…”
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Quantifying Compressible Groundwater Storage by Combining Cross‐Hole Seismic Surveys and Head Response to Atmospheric Tides by Rau, Gabriel C., Acworth, R. Ian, Halloran, Landon J. S., Timms, Wendy A., Cuthbert, Mark O.

“…Groundwater specific storage varies by orders of magnitude, is difficult to quantify, and prone to significant uncertainty. Estimating specific storage using…”
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