Search Results - "Scheibe, D."

Intercomparison of 3D pore-scale flow and solute transport simulation methods by Yang, Xiaofan, Mehmani, Yashar, Perkins, William A., Pasquali, Andrea, Schönherr, Martin, Kim, Kyungjoo, Perego, Mauro, Parks, Michael L., Trask, Nathaniel, Balhoff, Matthew T., Richmond, Marshall C., Geier, Martin, Krafczyk, Manfred, Luo, Li-Shi, Tartakovsky, Alexandre M., Scheibe, Timothy D.

“…•Reports a large 3D benchmark study of pore-scale modeling methods.•Codes and methods varied widely in complexity and computational demand.•Both macroscopic…”
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Subsurface biogeochemistry is a missing link between ecology and hydrology in dam-impacted river corridors by Graham, Emily B., Stegen, James C., Huang, Maoyi, Chen, Xingyuan, Scheibe, Timothy D.

“…Global investment in hydropower is rapidly increasing, fueled by a need to manage water availability and by incentives promoting renewable energy sources. This…”
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Hybrid models of reactive transport in porous and fractured media by Battiato, Ilenia, Tartakovsky, Daniel M., Tartakovsky, Alexandre M., Scheibe, T.D.

“…► We present a hybrid model that links computations at the pore and continuum scales. ► The hybrid algorithm is capable of handling highly localized…”
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Representing Organic Matter Thermodynamics in Biogeochemical Reactions via Substrate-Explicit Modeling by Song, Hyun-Seob, Stegen, James C., Graham, Emily B., Lee, Joon-Yong, Garayburu-Caruso, Vanessa A., Nelson, William C., Chen, Xingyuan, Moulton, J. David, Scheibe, Timothy D.

“…Predictive biogeochemical modeling requires data-model integration that enables explicit representation of the sophisticated roles of microbial processes that…”
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Mixing-induced precipitation: Experimental study and multiscale numerical analysis by Tartakovsky, A.M, Redden, G, Lichtner, P.C, Scheibe, T.D, Meakin, P

“…Laboratory experiments, pore-scale simulations, and continuum (Darcy) -scale simulations were used to study mixing-induced precipitation in porous media. In…”
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From legacy contamination to watershed systems science: a review of scientific insights and technologies developed through DOE-supported research in water and energy security by Dwivedi, Dipankar, Steefel, Carl I, Arora, Bhavna, Banfield, Jill, Bargar, John, Boyanov, Maxim I, Brooks, Scott C, Chen, Xingyuan, Hubbard, Susan S, Kaplan, Dan, Kemner, Kenneth M, Nico, Peter S, O’Loughlin, Edward J, Pierce, Eric M, Painter, Scott L, Scheibe, Timothy D, Wainwright, Haruko M, Williams, Kenneth H, Zavarin, Mavrik

“…Abstract Water resources, including groundwater and prominent rivers worldwide, are under duress because of excessive contaminant and nutrient loads. To help…”
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Apparent Decreases in Colloid Deposition Rate Coefficients with Distance of Transport under Unfavorable Deposition Conditions:  A General Phenomenon by Li, Xiqing, Scheibe, Timothy D, Johnson, William P

“…The transport of polystyrene microspheres was examined in packed glass beads under a variety of environmentally relevant ionic strength and flow conditions…”
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Modeling of streamflow in a 30 km long reach spanning 5 years using OpenFOAM 5.x by Chen, Yunxiang, Bao, Jie, Fang, Yilin, Perkins, William A, Ren, Huiying, Song, Xuehang, Duan, Zhuoran, Hou, Zhangshuan, He, Xiaoliang, Scheibe, Timothy D

“…Developing accurate and efficient modeling techniques for streamflow at the tens-of-kilometers spatial scale and multi-year temporal scale is critical for…”
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Geochemical and Microbial Community Attributes in Relation to Hyporheic Zone Geological Facies by Hou, Z., Nelson, W. C., Stegen, J. C., Murray, C. J., Arntzen, E., Crump, A. R., Kennedy, D. W., Perkins, M. C., Scheibe, T. D., Fredrickson, J. K., Zachara, J. M.

“…The hyporheic zone (HZ) is the active ecotone between the surface stream and groundwater, where exchanges of nutrients and organic carbon have been shown to…”
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Effects of incomplete mixing on multicomponent reactive transport by Tartakovsky, A.M., Tartakovsky, G.D., Scheibe, T.D.

“…Darcy-scale description of multicomponent reactive transport can significantly over-predict the extent of mixing-controlled reactions. Here we present a…”
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A smoothed particle hydrodynamics model for reactive transport and mineral precipitation in porous and fractured porous media by Tartakovsky, A.M, Meakin, P, Scheibe, T.D, Wood, B.D

“…A numerical model based on smoothed particle hydrodynamics (SPH) was used to simulate reactive transport and mineral precipitation in porous and fractured…”
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A novel construct for scaling groundwater–river interactions based on machine-guided hydromorphic classification by Hou, Zhangshuan, Ren, Huiying, Murray, Christopher J, Song, Xuehang, Fang, Yilin, Arntzen, Evan V, Chen, Xingyuan, Stegen, James C, Huang, Maoyi, Gomez-Velez, Jesus D, Duan, Zhuoran, Perkins, William A, Richmond, Marshall C, Scheibe, Timothy D

“…Abstract Hydrologic exchange between river channels and adjacent subsurface environments is a key process that influences water quality and ecosystem function…”
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Regulation-Structured Dynamic Metabolic Model Provides a Potential Mechanism for Delayed Enzyme Response in Denitrification Process by Song, Hyun-Seob, Thomas, Dennis G, Stegen, James C, Li, Minjing, Liu, Chongxuan, Song, Xuehang, Chen, Xingyuan, Fredrickson, Jim K, Zachara, John M, Scheibe, Timothy D

“…In a recent study of denitrification dynamics in hyporheic zone sediments, we observed a significant time lag (up to several days) in enzymatic response to the…”
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Machine Learning Analysis of Hydrologic Exchange Flows and Transit Time Distributions in a Large Regulated River by Ren, Huiying, Song, Xuehang, Fang, Yilin, Hou, Z Jason, Scheibe, Timothy D

“…Hydrologic exchange between river channels and adjacent subsurface environments is a key process that influences water quality and ecosystem function in river…”
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A fluid pressure and deformation analysis for geological sequestration of carbon dioxide by Xu, Zhijie, Fang, Yilin, Scheibe, Timothy. D., Bonneville, Alain

“…We present a fluid pressure and deformation analysis for geological sequestration of carbon dioxide based on a simplified hydro-mechanical model. This model…”
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Groundwater Contamination, Subsurface Processes, and Remediation Methods: Overview of the Special Issue of Water on Groundwater Contamination and Remediation by Mays, David, Scheibe, Timothy

“…This special issue of Water brings together ten studies on groundwater contamination and remediation. Common themes include practical techniques for plume…”
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WHONDRS-GUI: a web application for global survey of surface water metabolites by Lin, Xinming, Ren, Huiying, Goldman, Amy E, Stegen, James C, Scheibe, Timothy D

“…The Worldwide Hydrobiogeochemistry Observation Network for Dynamic River Systems (WHONDRS) is a consortium that aims to understand complex hydrologic,…”
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Pore-scale simulation of intragranular diffusion: Effects of incomplete mixing on macroscopic manifestations by Scheibe, Timothy D., Hou, Zhangshuan, Palmer, Bruce J., Tartakovsky, Alexandre M.

“…Diffusive mass transfer into and out of intragranular micropores (“intragranular diffusion”) plays an important role in the transport of some groundwater…”
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Model-based analysis of mixed uranium(VI) reduction by biotic and abiotic pathways during in situ bioremediation by Zhao, Jiao, Scheibe, T.D., Mahadevan, R.

“…Given the numerous unknowns and uncertainties in sediment systems, understanding of the mechanisms of U(VI) reduction is still at the stage of improvement…”
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Pore-scale simulation of microbial growth using a genome-scale metabolic model: Implications for Darcy-scale reactive transport by Tartakovsky, G.D., Tartakovsky, A.M., Scheibe, T.D., Fang, Y., Mahadevan, R., Lovley, D.R.

“…•We model microbially-mediated iron reduction at the pore scale.•We simulate microbial metabolism using a genome-scale modeling approach.•We compare the…”
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