Browsing by Author "Fernández García, Daniel"
Now showing items 21-40 of 47
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Elimination of the reaction rate 'scale effect': application of the Lagrangian reactive particle-tracking method to simulate mixing-limited, field-scale biodegradation at the Schoolcraft (MI, USA) site
(2017-12)
Article
Open AccessMeasured (or empirically fitted) reaction rates at groundwater remediation sites are typically much lower than those found in the same material at the batch or laboratory scale. The reduced rates are commonly attributed ... -
Enhanced NAPL removal and mixing with engineered injection and extraction
(2022-04)
Article
Open AccessAquifer remediation with in-situ soil washing techniques and enhanced oil removal typically involves the injection of liquid solutions into the geological formation to displace and mobilize non-aqueous phase liquids (NAPLs). ... -
Evaluación de las medidas de humedad de suelo generadas con datos disgregados de satélite a escala de parcela agrícola
(2017)
Conference report
Open AccessEl interés de medir la humedad de suelo a escala de parcela de cultivo mediante teledetección ha aumentado debido a la fácil disponibilidad de los datos y, que a diferencia de los sensores de humedad de suelo, no es necesario ... -
Evidence of groundwater vulnerability to climate variability and economic growth in coastal Kenya
(Elsevier, 2020-07)
Article
Open AccessClimate change and future abstraction regimes will influence the availability of groundwater resources. To alleviate any potential negative effects on aquifer systems and dependent industrial and human uses, it is important ... -
Generalizing Agarwal's method for the interpretation of recovery tests under non-ideal conditions
(2018-09)
Article
Open AccessPumping tests are performed during aquifer characterization to gain conceptual understanding about the system through diagnostic plots and to estimate hydraulic properties. Recovery tests consist of measuring head response ... -
GIS-based software platform for managing hydrogeochemical data
(Springer, 2016)
Part of book or chapter of book
Restricted access - publisher's policyIn over three decades, The Handbook of Environmental Chemistry has established itself as the premier reference source, providing sound and solid knowledge about environmental topics from a chemical perspective. Written by ... -
Guía técnica para la evaluación de la problemática del subsuelo asociada a compuestos organoclorados
(2004-01)
Research report
Open AccessLa protecció dels sòls contaminats és un dels requeriments medioambientals fixats per la llei de residuos 10/1994 i el real decret 9/2005. Fruit d’aquests i altres canvis normatius derivats de la nova cultura medioambiental, ... -
Improving degradation of emerging organic compounds by applying chaotic advection in Managed Aquifer Recharge in randomly heterogeneous porous media
(2017-05)
Article
Open AccessImproving degradation rates of emerging organic compounds (EOCs) in groundwater is still a challenge. Although their degradation is not fully understood, it has been observed that some substances are preferably degraded ... -
Improving the accuracy of risk prediction from particle-based breakthrough curves reconstructed with kernel density estimators
(2015-06)
Article
Open AccessWhile particle tracking techniques are often used in risk frameworks, the number of particles needed to properly derive risk metrics such as average concentration for a given exposure duration is often unknown. If too few ... -
Lagrangian modeling of reactive transport in heterogeneous porous media with an automatic locally adaptive particle support volume
(2018-10)
Article
Open AccessThe particle support volume is crucial for simulating reactive transport with Lagrangian methods as it dictates the interaction among particles. Assuming that it is constant in space, the particle support volume can be ... -
Mathematical equivalence between time-dependent single-rate and multirate mass transfer models
(2015-05)
Article
Open AccessThe often observed tailing of tracer breakthrough curves is caused by a multitude of mass transfer processes taking place over multiple scales. Yet, in some cases, it is convenient to fit a transport model with a single-rate ... -
Modeling reactive multi-component multi-phase flow for Geological Carbon Sequestration (GCS) with Matlab
(2023-03)
Article
Restricted access - publisher's policyWe present a reactive multi-component multi-phase flow program for simulating Geological Carbon Sequestration (GCS), an approach that reduces carbon emissions by storing in deep subsurface formations. The program, called ... -
Multiprocessing for the particle tracking model MODPATH
(Wiley, 2022-12)
Article
Open AccessParticle tracking has several important applications for solute transport studies in aquifer systems. Travel time distribution at observation points, particle coordinates in time and streamlines are some practical results ... -
On the formation of multiple local peaks in breakthrough curves
(2015-04)
Article
Open AccessThe analysis of breakthrough curves (BTCs) is of interest in hydrogeology as a way to parameterize and explain processes related to anomalous transport. Classical BTCs assume the presence of a single peak in the curve, ... -
Optimal reconstruction of non-symmetric travel time density distributions using a new kernel density estimator
(2013)
Conference report
Open Access -
Optimal reconstruction of reaction rates from particles distributions
(2010-05-07)
Conference report
Open AccessRandom walk particle tracking methodologies to simulate solute transport of conservative species constitute an attractive alternative for their computational efficiency and absence of numerical dispersion. Yet, problems ... -
Particle density estimation with grid-projected and boundary-corrected adaptive kernels
(Elsevier, 2019-09)
Article
Open AccessThe reconstruction of smooth density fields from scattered data points is a procedure that has multiple applications in a variety of disciplines, including Lagrangian (particle-based) models of solute transport in fluids. ... -
Probabilistic human health risk assessment of degradation-related chemical mixtures in heterogeneous aquifers: risk statistics, hot spots, and preferential channels
(2015-06)
Article
Open AccessThe increasing presence of toxic chemicals released in the subsurface has led to a rapid growth of social concerns and the need to develop and employ models that can predict the impact of groundwater contamination on human ... -
Random-walk modeling of reactive transport in porous media with a reduced-order chemical basis of conservative components
(2021-04)
Article
Open AccessIn this work we employ a reduced-order basis of conservative chemical components to model reactive transport using a Lagrangian (particle tracking) method. While this practice is well-understood in the Eulerian (grid-based) ... -
Solute transport in bounded porous media characterized by Generalized Sub-Gaussian log-conductivity distributions
(Elsevier, 2021-01)
Article
Open AccessThere are increasing evidences that probability distributions and associated statistical moments of a variety of hydrogeological and soil science variables and their spatial increments display distinctive scale-dependent ...
