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UPC: C/ Jordi Girona 31, (08034 - Barcelona) - IDAEA: C/ Jordi Girona 18-26, (08034 - Barcelona)

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Formación, cursos, eventos y seminarios

Webinar: Aplicación de la tomografía eléctrica marina continua y otros métodos en el estudio de acuíferos costeros

Webinar cycle in Hydrogeology and geochemistry

EACH THURSDAY (free of charge)

live in: https://meet.google.com/snb-qdkn-eex   

 

HYDROGEOLOGY GROUP

(Associated Unit CSIC-UPC, Barcelona)

 

Next webinar: Thursday, January 28 , 2021

Starting time: 12:15 (Central European Time)

Duration: 1h

 

This week’s Guest Speaker: Albert Folch, Profesor Lector

 

Title of the talk: Aplicación de la tomografía eléctrica marina continua y otros métodos en el estudio de acuíferos costeros.

 

Abstract:

 

Los acuíferos costeros no son solo importantes como recurso hídrico para las poblaciones costeras, sino que también lo son por la descarga de agua subterránea al mar y sus impactos en los ecosistemas. Con el objetivo de entender mejor los procesos que tienen lugar en este tipo de acuíferos, el Grupo de Hidrología Subterránea (UPC-CSIC), juntamente con otros grupos de investigación (UAB, UB, etc.) construyeron un site experimental en tierra de 60X40 metros altamente monitorizado. Actualmente esta investigación se está ampliando costa afuera (offshore) y a mayor escala con la aplicación de la tomografía eléctrica marina continua como parte del Proyecto TerraMar (Agencia Catalana del Agua). Con la ayuda de una embarcación se han realizado perfiles marinos para medir la resistividad del subsuelo marino cubriendo un área de 3 km2 en junio y octubre de 2020. En esta presentación se mostrarán los primeros datos obtenidos en dichas campañas. Complementariamente se compararan los resultados obtenido con otros métodos de caracterización de la descarga como los isótopos de radio presentándose también algunas de las otras líneas de investigación que se están desarrollando

 

Link to Presentation

Webinar: Supercritical CO2 intrusion into caprocks: experimental observations and numerical simulations

Webinar cycle in Hydrogeology and geochemistry

EACH THURSDAY (free of charge)

live in: https://meet.google.com/snb-qdkn-eex   

 HYDROGEOLOGY GROUP

(Associated Unit CSIC-UPC, Barcelona)

 Next webinar: Thursday,  21 January

Starting time: 12:15 (CentralEuropean Time)Duration: 1h

 

Supercritical CO2 intrusion into caprocks: experimental observations and numerical simulations

 

Iman Rahimzadeh Kivi

 ABSTRACT

 Geologic storage of carbon dioxide (CO2), mainly in deep saline aquifers, has emerged as a key solution to reach the Paris Agreement goal of limiting the global temperature increase below 2ºC and effectively mitigate climate change. The injected CO2 is less dense at the storage condictions than the resident brine and tends to flow upward by buoyancy. Therefore, to achieve the primary objective of permanently storing CO2 underground during geological time scales, the host reservoir should be overlain by a low-permeability and high-entry pressure caprock that prevents CO2 escaping from the storage formation. Meanwhile, the caprock sealing capacity is of particular significance and yet to be assessed in more detail. In this presentation, we aim at shedding light on the flow processes governing potential CO2 leakage through shaly caprocks ‎by ‎combining experimental observations and ‎‎numerical simulations‎. We present breakthrough experiments on Opalinus Clay, which is a representative caprock for CO2 storage. These experiments reproduce supercritical CO2 intrusion and flow through the caprock sample under representative reservoir conditions. Next, we address numerical simulation of the breakthrough experiments using a two-phase flow model in deformable porous media to provide a mechanistic interpretation of experimental observations. Overall, we conclude that CO2 leakage through the caprock is dominated by molecular diffusion rather than by rapid bulk volumetric advection.    

Presentation: link

Webinar: Geostatistical analysis and stochastic simulation of functional data in groundwater hydrology

Webinar cycle in Hydrogeology and geochemistry

EACH THURSDAY (free of charge)

live in: https://meet.google.com/snb-qdkn-eex   

 HYDROGEOLOGY GROUP

(Associated Unit CSIC-UPC, Barcelona)

 Next webinar: Thursday, January 14 , 2021

Starting time: 12:15 (Central European Time)

Duration: 1h

 This week’s Guest Speaker: Alberto Guadagnini, Professor Politécnico de Milano

 Title of the talk:

Geostatistical analysis and stochastic simulation of functional data in groundwater hydrology

Abstract:

We address recent advances in the geostatistical analysis and stochastic simulation of functional data which are common to groundwater hydrology scenarios. Specifically, we consider the potential of such approaches to (a) analyze soil particle-size curves (PSCs) in a small-scale heterogeneous aquifer and (b) assess Natural Background Levels (NBLs) of target chemical species in large-scale aquifer systems. The study is viewed in the context of field works yielding observations which can be rendered in the form of heterogeneous and high-dimensional data.

With reference to the first scenario, we take advantage of the availability of sedimentological characterizations in the form of functional or distributional data (e.g., cumulative distribution or probability density functions). Unlike approaches that focus solely on a few selected features of PSCs (e.g., selected quantiles), the approach we consider yields kriged estimates or stochastic realizations of the spatial distribution of entire particle-size curves. The methodology provides us with the ability to project the entire information content embedded within the data onto a computational grid, with the final aim of characterizing unsampled locations in the system.

When considering large-scale aquifer bodies, the approach allows exploiting the full information content embedded in the probability density function of the variables of interest, as estimated from historical records of chemical observations. As such, the population of the entire distribution functions of concentrations detected across a network of monitoring boreholes within a given aquifer is considered as the object of the spatial analysis. This leads to spatially distributed kriging predictions of NBLs, as well as a robust quantification of the ensuing uncertainty and probability of exceeding given threshold concentration values through stochastic simulation.

Webinar presentation

 

Webinar: Microbial activity enhancement in constructed wetlands operated as bioelectrochemical systems

Webinar cycle in Hydrogeology and geochemistry

EACH THURSDAY (free of charge)

live in: https://meet.google.com/snb-qdkn-eex   

 HYDROGEOLOGY GROUP

(Associated Unit CSIC-UPC, Barcelona)

Next webinar: Thursday, December 3, 2020

Starting time: 12:15 (Central European Time)

Duration: 1h

 

This week’s Guest Speaker:  Marta Fernandez, Ph D Student

 

Title of the talk: Microbial activity enhancement in constructed wetlands operated as bioelectrochemical systems.

 

Abstract:

Bioelectrochemical systems (BES) implemented in treatment wetlands (TW), such as Microbial Fuel Cells (MFC-TW) or Microbial Electrolysis Cells (MEC-TW), are a relative new technology emerged from the need to overcome the high land requirement of conventional treatment wetlands.  Actually, the implementation of BES demonstrated to improve the contaminants removal efficiency in wastewater treatment compared with conventional TW. However, the reasons behind this effect are still unknown.
The purpose of the present work was to elucidate whether the operation of a treatment wetland as an electrochemical system may increase the biomass activity, and to which extent overall increase in biomass activity is able to explain a higher contaminant removal efficiency in BES-TW. To this aim two different techniques (FDA hydrolysis and respirometry) and three configurations (conventional TW, TW operated as MFC and TW operated as MEC) were evaluated.

View presentation here: presentation

Webinar: Sensitivity: an intuitive, multifaced, and fruitful concept

Webinar cycle in Hydrogeology and geochemistry

EACH THURSDAY (free of charge)

live in: https://meet.google.com/snb-qdkn-eex   

 

HYDROGEOLOGY GROUP

(Associated Unit CSIC-UPC, Barcelona)

Next webinar: Thursday, November 26, 2020

Starting time: 12:15 (Central European Time)

Duration: 1h

 

This week’s Guest Speaker: Aronne Dell'Oca, Researcher Politecnico de Milano

 

Title of the talk:

Sensitivity: an intuitive, multifaced, and fruitful concept

 

Abstract

Sensitivity analysis (SA) has become a keyelementacross the diverse steps of the chain that leads to understanding, modeling and (eventually) predicting the behavior (and the associated uncertainty) of systems characterized by a variety of degrees of complexity. In this context, SA may effectively assist a variety ofanalyses, such as factors screening and fixing, uncertainty apportioning, experimental design, efficient model calibration and parameter estimation, as well asgaining enhanced understanding of the system under analysis.The multi-faced capabilities and potentialassociated with SA stem from the intrinsic generality and broadness of the concept of sensitivity. The latter is an (ironically) intuitiveconcept. Research and operational questions framed in this context include: What do we mean by sensitivity? How do we measure/quantify it? What is the purpose of a sensitivity analysis? Is there a best (or most appropriate way) way to measure/define/characterize sensitivity?Here, we present a (forcibly incomplete) survey of diverse flavors of SA, ranging from local to global SA strategies; considering a variety of definitions at the heart of the concept of sensitivity (e.g., statistical moment(s)-, derivative-, information theory-, copula density-based techniques); encompassing SA techniques developed within the context of single- to multi-model approaches. We try to elucidate the purpose of diverse SA methodologies to assist researchers with their (simultaneous and complementary) usage.We conclude by briefly presenting some open challenges which might require novel paradigms in the context of SA.

View presentatio here: presentation

 

Webinar: Biotite reactivity in nitric and oxalic acid at low temperature and acid pH

Webinar cycle in Hydrogeology and geochemistry

EACH THURSDAY (free of charge)

live in: https://meet.google.com/snb-qdkn-eex   

 

HYDROGEOLOGY GROUP

(Associated Unit CSIC-UPC, Barcelona)

 

Next webinar: Thursday, November 12, 2020

Starting time: 12:15 (Central European Time)

Duration: 1h

 

This week’s Guest Speaker: Jordi Cama,  Researcher CSIC

 

Abstract:

Dissolution of phyllosilicates (e.g. biotite) plays a central role in a wide array of geochemical processes occurring in both natural and engineered environments A detailed knowledge of the dissolution reaction mechanisms related to the environmental variables (e.g. pH, temperature, organic matter, chemical affinity or ionic strength) is necessary to better understand the reactivity of phyllosilicates.

To this end, single millimetric, cleaved flakes of biotite are reacted in batch and flow-through experiments to obtain biotite dissolution rates at a temperature range of 25-70 ºC and pH range of 1-3 in the presence of nitric acid and oxalic acid solutions and elucidate the mechanisms that control the overall dissolution reaction. The reacting basal surface is explored using in-situ laser confocal microscopy and ex-situ scanning and phase shifting interferometry.

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