A5006696147- Groundwater flow and contamination studies
- Fluid Dynamics and Turbulent Flows
- Meteorological Phenomena and Simulations
- Oceanographic and Atmospheric Processes
- Mine drainage and remediation techniques
- Tropical and Extratropical Cyclones Research
- Ocean Waves and Remote Sensing
- Climate variability and models
- Groundwater and Isotope Geochemistry
- Wind and Air Flow Studies
- Hydraulic Fracturing and Reservoir Analysis
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- Marine Biology and Ecology Research
- Hydrocarbon exploration and reservoir analysis
- Solar and Space Plasma Dynamics
- Soil and Unsaturated Flow
- DNA and Biological Computing
- DNA and Nucleic Acid Chemistry
- Environmental Monitoring and Data Management
- CO2 Sequestration and Geologic Interactions
- Marine and fisheries research
- Navier-Stokes equation solutions
- Geological formations and processes
- Geophysical and Geoelectrical Methods
University of Wisconsin–Madison
2014-2025
OAI Consulting (United States)
2015-2024
University of Michigan–Flint
2024
British Association for Immediate Care Scotland
2023
Georgia Institute of Technology
2023
Woods Hole Oceanographic Institution
2023
University of British Columbia
2012-2022
North Carolina State University
2022
Morehead State University
2022
Hudbay Minerals (Canada)
2021
[1] Permeability, the ease of fluid flow through porous rocks and soils, is a fundamental but often poorly quantified component in analysis regional-scale water fluxes. Permeability difficult to quantify because it varies over more than 13 orders magnitude heterogeneous dependent on direction. Indeed, at regional scale, maps permeability only exist for soil depths 1–2 m. Here we use an extensive compilation results from hydrogeologic models show that (>5 km) consolidated unconsolidated...
Conventional modeling of mass transport in groundwater systems usually involves use the dispersion‐convection equation with large values porous medium dispersivity to account for macroscopic dispersion. This work describes a concept which accounts dispersion not as large‐scale diffusion process but mixing caused by spatial heterogeneities hydraulic conductivity. The two‐dimensional spatially autocorrelated conductivity field is generated first‐order nearest‐neighbor stochastic process....
A stochastic analysis of two‐dimensional steady state groundwater flow in a bounded domain is carried out by using Monte Carlo techniques. The divided into set square blocks. nearest‐neighbor process model used to generate multilateral spatial dependence between hydraulic conductivity values the block system. Both statistically isotropic and anisotropic autocorrelation functions are considered. This leads realistic representation variations discrete medium. Results simulations provide...
Anthony, A., J. Atwood, P. August, C. Byron, S. Cobb, Foster, Fry, A. Gold, K. Hagos, L. Heffner, D. Q. Kellogg, Lellis-Dibble, Opaluch, Oviatt, Pfeiffer-Herbert, N. Rohr, Smith, T. Smythe, Swift, and Vinhateiro. 2009. Coastal lagoons climate change: ecological social ramifications in U.S. Atlantic Gulf coast ecosystems. Ecology Society 14(1): 8. https://doi.org/10.5751/ES-02719-140108
Forced turbulence in a rotating frame is studied using numerical simulations triply periodic box. The random forcing three dimensional and localized about an intermediate wavenumber kf. results show that energy transferred to scales larger than the scale when rotation rate large enough. scaling of spectrum approaches E(k)∝k−3 for k<kf. Almost all k<kf lies two-dimensional (2D) plane perpendicular z-axis, thus large-scale motions are quasi-2D with E(k)≈E(kh,kz=0), where kh kz...
Abstract This paper is the first in a four‐part series that describes application of decision analysis to engineering design for projects which hydrogeological environment plays an important role. The methodology well‐suited containment facilities at new waste‐management facilities, purge‐well networks contaminant remediation applications, or drainage systems geotechnical projects. It based on risk‐based philosophy design. involves coupling three separate models: model risk‐cost‐benefit...
The mechanical response of a fault zone during an earthquake may be controlled by the diffusion excess heat and fluid pressures generated frictional heating. In this study we formulate model which incorporates effects heating on thermal, hydrologic, small patch failure surface. This is used to examine parameters that control determine their critical range values where thermal pressurization significant. problem has two time scales: characteristic slip duration for pressurization. set...
We consider two-dimensional flow stirred by a small-scale, white-in-time random noise in the zero viscosity limit. Numerical simulations show that, after transient state, an inertial-range energy spectrum E(k)\ensuremath{\propto}${\mathit{k}}^{\mathrm{\ensuremath{-}}\mathit{x}}$ with x=5/3\ifmmode\pm\else\textpm\fi{}0.05 is established inverse cascade process. This range grows time until Bose condensate formed at largest scales system (k\ensuremath{\approxeq}1). Prior to formation statistics...
Numerical simulations are used to study homogeneous, forced turbulence in three-dimensional rotating, stably stratified flow the Boussinesq approximation, where rotation axis and gravity both z ˆ-direction. Energy is injected through a isotropic white-noise forcing localized at small scales. The parameter range studied corresponds Froude numbers smaller than an O (1) critical value, below which energy transferred scales larger values of ratio N / f from ≈1/2 ∞, Brunt–Väisälä frequency twice...
The Global Ocean Observing System (GOOS) and its partners have worked together over the past decade to break down barriers between open-ocean coastal observing, scientific disciplines, operational research institutions. Here we discuss some GOOS successes challenges from decade, present ideas for moving forward, including highlights of 2030 Strategy published in 2019. OceanObs'09 meeting Venice 2009 resulted a remarkable consensus on need common set guidelines global ocean observing...
The purpose of this paper is to provide an independent, comprehensive, critical review the ‘‘renormalization group’’ theory turbulence developed by Yakhot and Orszag [J. Sci. Comput. 1, 3 (1986)]. first part a confirmation their basic for Navier–Stokes equations, followed discussion approximations in scale removal procedure. main examines YO derivations velocity-derivative skewness transport equation energy dissipation rate ℰ. An algebraic error derivation corrected. Several problems are...
Forced rotating turbulence is simulated within a periodic box of small aspect ratio. Critical parameter values are found for the stability 2D inverse cascade energy in presence 3D motions at scales. There critical rotation rate below which forcing leads to an equilibrated state, while slightly larger rate, drives cascade. It shown that and forward cascades can coexist. This study relevant geophysical flows, contains physics beyond scope quasigeostrophic models.
The direct discharge of groundwater into the coastal zone has received increased attention in last few years. We now know that this process represents an important pathway for material transport between land and sea. Groundwater often contains higher concentrations dissolved nutrients other components than does river water; thus, it can play role health ecosystems.
▪ Abstract The renormalization-group (RG) analysis of turbulence, based primarily on KG Wilson's coarse-graining procedure, leads to suggestive results for turbulence coefficients and models. Application the method evolved from contributions many authors received widespread attention following 1986 work V Yakhot SA Orszag. Yakhot-Orszag involves basic scale-removal as well additional hypotheses approximations; their is reviewed here with an attempt clarify those approximations. Discussion...
The modeling technique developed in paper l (Forster and Smith, this issue) of two‐part study provides a quantitative means for assessing the impact factors controlling groundwater flow systems mountainous terrain. Conditions to be examined include surface topography (slope profile, relief, three‐dimensional form), geology (permeability thermal conductivity), climate (available infiltration, presence extent alpine glaciers, temperature conditions), regional heat flux. Modeling results...
A continuum approach has been developed for modeling mass transport in fractured rocks. It involves a new application of particle‐tracking method which physical is simulated terms velocity and the variations velocity. Statistics describing particle motion come from observing actual pattern discrete subdomain. This subdomain small but representative piece much larger continuum. In effect, forced to mimic that The model successfully duplicates patterns anisotropic dispersion predicted by de...
The Ocean Observatories Initiative (OOI) is an integrated suite of instrumented platforms and discrete instruments that measure physical, chemical, geological, biological properties from the seafloor to sea surface.The OOI provides data address large-scale scientific challenges such as coastal ocean dynamics, climate ecosystem health, global carbon cycle, linkages among volcanism life.The Cyberinfrastructure currently serves over 250 terabytes arrays.These are freely available users...
Fluid circulation, heat transfer, and the development of thermal springs are examined for vertical fault zones with anisotropic permeability internal heterogeneity. Interactions between thermally driven convective circulation in zone topographically groundwater flow through surrounding country rock mapped space (permeability versus permeability) compared to earlier results homogeneous, isotropic zones. Simulations a 4–10 times more permeable strike than dip direction show that field steady...
Numerical simulations are used to study a series of reduced models homogeneous, rotating flow at moderate Rossby numbers is the wavenumber in plane perpendicular axis rotation, and (iii) strong cyclone/anticyclone asymmetry favour cyclones. Non-resonances, defined as complement near resonances, act reduce energy transfer large scales.
Introduction of a data set for second potential field provides an approach to deal with limitations in the inverse problem. We examine how temperature measurements can be used improve resolution model parameters constructing steady state groundwater flow system. The is applicable cross‐sectional models vertical components fluid flow. In media low hydraulic conductivity, thermal regime conductive and do not carry direct information on hydrogeologic regime. more permeable systems however,...