Search Results - "Ronayne, Michael J."

Multiple timescales of streambed flux variability in two perennial mountain‐front streams by Cognac, Kristen E., Ronayne, Michael J.

“…Streambed fluxes are highly variable through time and space, having a range implications for stream‐aquifer processes. This study investigated streambed fluxes…”
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Hydrological dynamics and associated greenhouse gas fluxes in a mountain peatland under different climate scenarios by Millar, David J., Cooper, David J., Dwire, Kathleen A., Hubbard, Robert M., Ronayne, Michael J., Fischer, Joseph

“…Peatlands have sequestered atmospheric carbon dioxide (CO2) for millennia and can also act as significant sources of atmospheric methane (CH4). Hydrological…”
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Identifying discrete geologic structures that produce anomalous hydraulic response: An inverse modeling approach by Ronayne, Michael J, Gorelick, Steven M, Caers, Jef

“…Subsurface hydraulic response is controlled by discrete geologic structures in a variety of aquifer settings. In this work, we analyze data from the…”
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Influence of conduit network geometry on solute transport in karst aquifers with a permeable matrix by Ronayne, Michael J.

“…► Percolation algorithm used to generate 3D karstic conduit networks. ► Numerical study of solute advection in synthetic aquifers with embedded networks. ►…”
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Demonstration of Sustainable Development of Groundwater through Aquifer Storage and Recovery (ASR) by Alqahtani, Abdulaziz, Sale, Tom, Ronayne, Michael J., Hemenway, Courtney

“…Sustained pumping of groundwater can lead to declining water levels in wellfields and concerns regarding the sustainability of groundwater resources. Aquifer…”
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Changes to inter-aquifer exchange resulting from long-term pumping: implications for bedrock groundwater recharge by Cognac, Kristen E., Ronayne, Michael J.

“…Extensive pumping of aquifer systems alters the water budget components for individual aquifer units. This study evaluated long-term changes in…”
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Snowpack relative permittivity and density derived from near‐coincident lidar and ground‐penetrating radar by Bonnell, Randall, McGrath, Daniel, Hedrick, Andrew R., Trujillo, Ernesto, Meehan, Tate G., Williams, Keith, Marshall, Hans‐Peter, Sexstone, Graham, Fulton, John, Ronayne, Michael J., Fassnacht, Steven R., Webb, Ryan W., Hale, Katherine E.

“…Depth‐based and radar‐based remote sensing methods (e.g., lidar, synthetic aperture radar) are promising approaches for remotely measuring snow water…”
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Comparison of a karst groundwater model with and without discrete conduit flow by Saller, Stephen P., Ronayne, Michael J., Long, Andrew J.

“…Karst aquifers exhibit a dual flow system characterized by interacting conduit and matrix domains. This study evaluated the coupled continuum pipe-flow…”
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Form‐based river restoration decreases wetland hyporheic exchange: Lessons learned from the Upper Colorado River by Sparacino, Matthew S., Rathburn, Sara L., Covino, Timothy P., Singha, Kamini, Ronayne, Michael J.

“…Restoration of river–wetland systems to recover lost ecosystem services and restore consistent flood regimes is commonly directed at modifying in‐channel…”
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Geological modeling of submeter scale heterogeneity and its influence on tracer transport in a fluvial aquifer by Ronayne, Michael J., Gorelick, Steven M., Zheng, Chunmiao

“…We developed a new model of aquifer heterogeneity to analyze data from a single‐well injection‐withdrawal tracer test conducted at the Macrodispersion…”
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Forecasting Groundwater Contaminant Plume Development Using Statistical and Machine Learning Methods by McConnell, Liz, Karimi Askarani, Kayvan, Cognac, Kristen E., Mack, E. Erin, Bartlett, Craig, Ronayne, Michael J., Blotevogel, Jens

“…Forecasting groundwater contaminant plume development is critical for determining risks to downgradient receptors and predicting the time to site closure…”
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Estimating Aquifer Properties Using Derivative Analysis of Water Level Time Series from Active Well Fields by Lewis, Alan R., Ronayne, Michael J., Sale, Thomas C.

“…Water level time series from groundwater production wells offer a transient dataset that can be used to estimate aquifer properties in areas with active…”
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Relationships between vegetation type, peat hydraulic conductivity, and water table dynamics in mountain fens by Crockett, Audrey C., Ronayne, Michael J., Cooper, David J.

“…The ecohydrologic function of fens is characterized by feedbacks between biological and hydrologic processes. Vegetation composition is one important factor…”
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Effects of groundwater pumping on the sustainability of a mountain wetland complex, Yosemite National Park, California by Cooper, David J., Wolf, Evan C., Ronayne, Michael J., Roche, James W.

“…•Fens are perennially saturated, peat-accumulating, groundwater dependent ecosystems.•We quantified/modeled the effects of groundwater pumping on fens.•Pumping…”
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Groundwater dynamics in mountain peatlands with contrasting climate, vegetation, and hydrogeological setting by Millar, David J., Cooper, David J., Ronayne, Michael J.

“…•Groundwater dynamics were investigated in two contrasting mountain peatlands.•Hydrological field investigations were combined with empirical…”
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Analysis of managed aquifer recharge for retiming streamflow in an alluvial river by Ronayne, Michael J., Roudebush, Jason A., Stednick, John D.

“…•Numerical modeling of managed aquifer recharge system designed to retime streamflow.•Framework using capture concepts is developed to analyze stream-aquifer…”
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Effective permeability of porous media containing branching channel networks by Ronayne, Michael J, Gorelick, Steven M

“…We study the effective permeability of two-dimensional binary systems characterized by a network of branching channels embedded in a uniform matrix material…”
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Field characterization of hydraulic conductivity in a heterogeneous alpine glacial till by Ronayne, Michael J., Houghton, Tyler B., Stednick, John D.

“…► We characterize the hydraulic conductivity of a glacial till in the Rocky Mountains. ► Compared to continental glacial tills, the K values are orders of…”
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Field characterization of hydraulic conductivity in a heterogeneous alpine glacial till by RONAYNE, Michael J, HOUGHTON, Tyler B, STEDNICK, John D

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