Vázquez Suñé, Enric
Total activity: 234
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GHS - Hydrogeology Group
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  • Urban groundwater contamination by residues of UV filters

     Jurado Elices, Anna; Gago Ferrero, Pablo; Vázquez Suñé, Enric; Carrera Ramírez, Jesús; Pujades Garnes, Estanislao; Díaz Cruz, Sílvia; Barceló Culleres, Damià
    Journal of hazardous materials
    Vol. 271, p. 141-149
    DOI: 10.1016/j.jhazmat.2014.01.036
    Date of publication: 2014-04-30
    Journal article

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    The occurrence and fate of UV filters (UV F) in an urban aquifer in correlation with (1) the spatial distribution of UV Fin Barcelona's groundwater, (2) the depth of the groundwater sample, (3) the physicochemical properties of the target compounds, (4) the recharge sources, and (5) the redox conditions of the Barcelona aquifers, were studied for the first time. The highest groundwater concentrations and the largest number of detected UV F were observed in an aquifer recharged by a polluted river (around 55 ng/L in SAP-4). In contrast, the urbanized areas had lower concentrations (around 20 ng/L in MPSP-1). Two pathways can be identified for UV F to enter the aquifers: (1) leakage of row sewage from the sewage network in urbanized areas and (2) wastewater treatment plant (WWTP) effluents discharged into the river. Measured concentrations of UV F were significantly much lower than those estimated from the waste water proportion in groundwater samples suggesting that UV F might undergo transformation processes in both reducing and oxidizing conditions. (c) 2014 Elsevier B.V. All rights reserved.

    The occurrence and fate of UV filters (UV F) in an urban aquifer in correlation with (1) the spatial distribution of UV Fin Barcelona's groundwater, (2) the depth of the groundwater sample, (3) the physicochemical properties of the target compounds, (4) the recharge sources, and (5) the redox conditions of the Barcelona aquifers, were studied for the first time. The highest groundwater concentrations and the largest number of detected UV F were observed in an aquifer recharged by a polluted river (around 55 ng/L in SAP-4). In contrast, the urbanized areas had lower concentrations (around 20 ng/L in MPSP-1). Two pathways can be identified for UV F to enter the aquifers: (1) leakage of row sewage from the sewage network in urbanized areas and (2) wastewater treatment plant (WWTP) effluents discharged into the river. Measured concentrations of UV F were significantly much lower than those estimated from the waste water proportion in groundwater samples suggesting that UV F might undergo transformation processes in both reducing and oxidizing conditions. (c) 2014 Elsevier B.V. All rights reserved.

  • GIS-based hydrogeochemical analysis tools (QUIMET)

     Velasco Mansilla, Domitila Violeta; Tubau Fernandez, Isabel; Vázquez Suñé, Enric; Gogu, Constantin Radu; Gaitanaru, D; Alcaraz, M.; Serrano Juan, Alejandro; Fernandez Garcia, Daniel; Garrido, T; Fraile, J; Sanchez Vila, Francisco Javier
    Computers and geosciences
    Vol. 70, p. 164-180
    DOI: 10.1016/j.cageo.2014.04.013
    Date of publication: 2014-09
    Journal article

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    A software platform (QUIMET) was developed to improve the sorting, analysis, calculations, visualizations, and interpretations of hydrogeochemical data in a GIS environment. QUIMET is composed of a geospatial database plus a set of tools specially designed for graphical and statistical analysis of hydrogeochemical data. The geospatial database has been designed to include organic and inorganic chemical records, as well as relevant physical parameters (temperature, Eh, electrical conductivity). The instruments for analysis cover a wide range of methodologies for querying, interpreting, and comparing groundwater quality data. They include, among others, chemical time-series analysis, ionic balance calculations, correlation of chemical parameters, and calculation of various common hydrogeochemical diagrams (Salinity, Schoeller-Berkaloff, Piper, and Stiff). The GIS platform allows the generation of maps of the spatial distribution of parameters and diagrams. Moreover, it allows performing a complete statistical analysis of the data including descriptive statistic univariate and bivariate analysis, the latter including generation of correlation matrices and graphics. Finally, QUIMET offers interoperability with other external platforms. The platform is illustrated with a geochemical data set from the city of Badalona, located on the Mediterranean coast in NE Spain. (C) 2014 Elsevier Ltd. All rights reserved.

  • Deep enclosures versus pumping to reduce settlements during shaft excavations

     Pujades Garnes, Estanislao; Vázquez Suñé, Enric; Carrera Ramírez, Jesús; Vilarrasa Riaño, Victor; De Simone, Silvia; Jurado Elices, Anna; Ledesma Villalba, Alberto; Ramos Schneider, Gonzalo; Lloret Morancho, Antonio
    Engineering geology
    Vol. 169, p. 100-111
    DOI: 10.1016/j.enggeo.2013.11.017
    Date of publication: 2014-02-04
    Journal article

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    Deep excavations in aquifers may be constructed by combining pumping with the cut and cover method. The enclosures are often deepened more than structurally needed, in order to diminish the risk of heave or fluidisation inside the excavation, and to reduce pumping rates and the associated settlements outside jet-grouting piles are sometimes adopted for lengthening. We analysed the water-proofing efficiency of jet-grouting and the need for water isolation in preconsolidated sediments. We used data obtained from two shaft excavations during the construction of the high speed train tunnel in Barcelona, located adjacent to the Sagrada Familia Basilica. Jet-grouting was characterised using pumping tests before and after the construction of the enclosure. The effectiveness of deepened enclosures was evaluated by comparing settlements caused and discharges required for several dewatering scenarios. Differences between them lie in the depth of the enclosures. Settlements were calculated analytically, using the drawdown obtained from a hydrogeological model, and numerically employing a hydro-mechanical model. Results show that jet-grouting reduced the permeability of the soil (90% reduction, from 5.5 to 0.6 m/d). However, this reduction only affected the pile area, so that the necessary pumping rate and the settlements outside the enclosure were only reduced by 40%. Results also show that settlements due to groundwater pumping are fairly smooth (i.e., differential settlements are small) with low absolute values. Moreover, they recover when pumping ceases. This rather elastic and stiff behaviour reflects the preconsolidated nature of the sediments in Barcelona and the fact that drawdowns concentrate at depth, where the soil is most compact, causing little change in effective stress near the soil surface. Under these conditions, pumping does not pose a serious risk to settlements, and excavation costs can be lowered by constructing the enclosure at the minimum depth required structurally. Also, an intense control of the pumping process may help reducing the conventional safety factors against heave.

    Deep excavations in aquifers may be constructed by combining pumping with the cut and cover method. The enclosures are often deepened more than structurally needed, in order to diminish the risk of heave or fluidisation inside the excavation, and to reduce pumping rates and the associated settlements outside jet-grouting piles are sometimes adopted for lengthening. We analysed the water-proofing efficiency of jet-grouting and the need for water isolation in preconsolidated sediments. We used data obtained from two shaft excavations during the construction of the high speed train tunnel in Barcelona, located adjacent to the Sagrada Familia Basilica. Jet-grouting was characterised using pumping tests before and after the construction of the enclosure. The effectiveness of deepened enclosures was evaluated by comparing settlements caused and discharges required for several dewatering scenarios. Differences between them lie in the depth of the enclosures. Settlements were calculated analytically, using the drawdown obtained from a hydrogeological model, and numerically employing a hydro-mechanical model. Results show that jet-grouting reduced the permeability of the soil (90% reduction, from 5.5 to 0.6 m/d). However, this reduction only affected the pile area, so that the necessary pumping rate and the settlements outside the enclosure were only reduced by 40%. Results also show that settlements due to groundwater pumping are fairly smooth (i.e., differential settlements are small) with low absolute values. Moreover, they recover when pumping ceases. This rather elastic and stiff behaviour reflects the preconsolidated nature of the sediments in Barcelona and the fact that drawdowns concentrate at depth, where the soil is most compact, causing little change in effective stress near the soil surface. Under these conditions, pumping does not pose a serious risk to settlements, and excavation costs can be lowered by constructing the enclosure at the minimum depth required structurally. Also, an intense control of the pumping process may help reducing the conventional safety factors against heave.

  • Dewatering of a deep excavation undertaken in a layered soil

     Pujades Garnes, Estanislao; Vázquez Suñé, Enric; Carrera Ramírez, Jesús; Jurado Elices, Anna
    Engineering geology
    Vol. 178, p. 15-27
    DOI: 10.1016/j.enggeo.2014.06.007
    Date of publication: 2014-08-21
    Journal article

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    In order to carry out deep excavations under the water table in urban environments, the safety of the work site and of the adjacent buildings is a major cause for concern. One of the most common and effective methods of undertaking these excavations involves combining the cut and cover method with a dewatering system. The success of a construction depends on the stability of the excavation bottom, the effects produced outside the excavation by dewatering (soil movements) and/or the state of the enclosure (defects in the diaphragm walls). This study proposes a realistic multidisciplinary procedure to address these issues. The work emphasizes the importance of soil characterisation and underlines the need to perform a Watertightness Assessment Test (WTAT) before the excavation stage. The procedure was applied to the excavation of a deep shaft of the High Speed Train (HST) tunnel in Barcelona. An earlier geological characterisation at large scale ruled out the use of deep pumping wells. However, a subsequent hydrogeological characterisation, which involved borehole logging, grain size analyses, Natural Gamma Ray and pumping tests, revealed the presence of thin transmissive layers inside the low hydraulic conductivity materials. The dewatering system was designed by considering different model scenarios and the safest design was selected for the excavation. Depths of the enclosure and of the pumping wells differed in accordance with the scenarios. The impacts (settlements due to pumping) and the stability in each scenario were computed. The state of the enclosure underwent a WTAT before the start of the excavation, but after constructing the enclosure, to verify its low permeability. The test consisted in pumping inside the enclosure and monitoring the groundwater behaviour outside the enclosure. Numerical interpretation of this test showed a defect in the diaphragm walls below the excavation bottom. Since this defect was not repaired because of its location (below the bottom of the excavation), the dewatering system had to be redesigned to ensure safety. Surface settlements, which were also a source of concern, were small. They were computed using coupled hydro-mechanical models.

    In order to carry out deep excavations under the water table in urban environments, the safety of the work site and of the adjacent buildings is a major cause for concern. One of the most common and effective methods of undertaking these excavations involves combining the cut and cover method with a dewatering system. The success of a construction depends on the stability of the excavation bottom, the effects produced outside the excavation by dewatering (soil movements) and/or the state of the enclosure (defects in the diaphragm walls). This study proposes a realistic multidisciplinary procedure to address these issues. The work emphasizes the importance of soil characterisation and underlines the need to perform a Watertightness Assessment Test (WTAT) before the excavation stage. The procedure was applied to the excavation of a deep shaft of the High Speed Train (HST) tunnel in Barcelona. An earlier geological characterisation at large scale ruled out the use of deep pumping wells. However, a subsequent hydrogeological characterisation, which involved borehole logging, grain size analyses, Natural Gamma Ray and pumping tests, revealed the presence of thin transmissive layers inside the low hydraulic conductivity materials. The dewatering system was designed by considering different model scenarios and the safest design was selected for the excavation. Depths of the enclosure and of the pumping wells differed in accordance with the scenarios. The impacts (settlements due to pumping) and the stability in each scenario were computed. The state of the enclosure underwent a WTAT before the start of the excavation, but after constructing the enclosure, to verify its low permeability. The test consisted in pumping inside the enclosure and monitoring the groundwater behaviour outside the enclosure. Numerical interpretation of this test showed a defect in the diaphragm walls below the excavation bottom. Since this defect was not repaired because of its location (below the bottom of the excavation), the dewatering system had to be redesigned to ensure safety. Surface settlements, which were also a source of concern, were small. They were computed using coupled hydro-mechanical models.

  • The use of GIS-based 3D geological tools to improve hydrogeological models of sedimentary media in an urban environment

     Velasco Mansilla, Domitila Violeta; Gogu, Constantin Radu; Vázquez Suñé, Enric; Garriga, Adan; Ramos, E.; Riera, J.; Alcaraz, M.
    Enviromental Earth science
    Vol. 8, num. 68, p. 2162-2145
    DOI: 10.1007/s12665-012-1898-2
    Date of publication: 2013-04-01
    Journal article

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    A software platform was developed to facilitate the development of 3D geological models of sedimentary media for hydrogeological modelling, especially for urban environments. It is composed by a geospatial database and a set of tools that enable the user to perform an accurate stratigraphic analysis. The geospatial database is used for the management of a large amount of different data types coming from different sources (geophysical logs, borehole logs, hydraulic tests, etc.). Its structure allows us to store accurate and very detailed geological borehole-log description that can be straightforwardly generalized and further upscaled. The set of stratigraphic analysis instruments, working within a Geographical Information System (GIS) environment, has been set up to facilitate the geological data interpretation. Detailed stratigraphic columns of the selected boreholes can be generated using customized queries. Creating automatically a geological profile is further possible by displaying the boreholes lithological columns and the geophysical and geotechnical field-tests¿ results together with the defined stratigraphic units. Based on an interactive analysis environment is created, where the user is able to analyze and to define the possible existing correlation surfaces, units, and faults. The obtained information represented by the geological units/subunits can be then converted within a 3D environment. The resulted 3D features could be used within the same GIS environment or by external software packages for further stochastic analysis or to build up 3D geological and hydrogeological models. Starting from an accurate and very detailed geological description, the software allows us to represent in three dimensions (3D) the heterogeneity of the sedimentary media and their spatial distribution. Thus, it shows how connectivity implemented into hydrogeological models among the different sedimentary bodies plays an important role.

    A software platform was developed to facilitate the development of 3D geological models of sedimentary media for hydrogeological modelling, especially for urban environments. It is composed by a geospatial database and a set of tools that enable the user to perform an accurate stratigraphic analysis. The geospatial database is used for the management of a large amount of different data types coming from different sources (geophysical logs, borehole logs, hydraulic tests, etc.). Its structure allows us to store accurate and very detailed geological borehole-log description that can be straightforwardly generalized and further upscaled. The set of stratigraphic analysis instruments, working within a Geographical Information System (GIS) environment, has been set up to facilitate the geological data interpretation. Detailed stratigraphic columns of the selected boreholes can be generated using customized queries. Creating automatically a geological profile is further possible by displaying the boreholes lithological columns and the geophysical and geotechnical field-tests’ results together with the defined stratigraphic units. Based on an interactive analysis environment is created, where the user is able to analyze and to define the possible existing correlation surfaces, units, and faults. The obtained information represented by the geological units/subunits can be then converted within a 3D environment. The resulted 3D features could be used within the same GIS environment or by external software packages for further stochastic analysis or to build up 3D geological and hydrogeological models. Starting from an accurate and very detailed geological description, the software allows us to represent in three dimensions (3D) the heterogeneity of the sedimentary media and their spatial distribution. Thus, it shows how connectivity implemented into hydrogeological models among the different sedimentary bodies plays an important role. Results are shown consisting in a case study located in the Besòs River Delta, in the metropolitan area of Barcelona, on the Mediterranean coast in NE Spain.

  • Occurrence of 95 pharmaceuticals and transformation products in urban groundwaters underlying the metropolis of Barcelona, Spain

     López-Serna, Rebeca; Jurado Elices, Anna; Vázquez Suñé, Enric; Carrera Ramírez, Jesús; Petrovic, Mira; Barceló Culleres, Damià
    Environmental pollution
    Vol. 174, p. 305-315
    DOI: 10.1016/j.envpol.2012.11.022
    Date of publication: 2013-01
    Journal article

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  • Emerging organic contaminants in groundwater in Spain: A review of sources, recent occurrence and fate in a European context

     Jurado Elices, Anna; Carrera Ramírez, Jesús; Vázquez Suñé, Enric; López de Alda, Miren; Pujades Garnes, Estanislao; Barceló Culleres, Damià
    Science of the total environment
    Vol. 440, p. 82-94
    DOI: 10.1016/j.scitotenv.2012.08.029
    Date of publication: 2012
    Journal article

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    This paper reviewed the presence of emerging organic contaminants (EOCs) that have been found in the groundwater in Spain in both, rural and urban areas. The list of compounds included pesticides, pharmaceutical active compounds (PhACs), selected industrial compounds, drugs of abuse (DAs), estrogens, personal care products and life-style compounds. The main sources of pollution and possible pathways have been summarised in this review. EOCs are likely to enter to the aquifer mainly through the effluents of waste water treatment plants (WWTPs) and are present in groundwater at concentrations of ng/L to μg/L. The most studied compounds in Spanish groundwater were pesticides followed by industrial compounds and PhACs. It is important to mention that compared to other water bodies, such as rivers, groundwater is considerably less contaminated, which may be indicative of the natural attenuation capacity of the aquifers. However, some EOCs have sometimes been detected at higher concentration levels in the aquifer than in the rivers, indicating the need for further research to understand their behaviour in the aquifers. For a wide array of compounds, their maximum concentrations show values above the European groundwater quality standard for individual pesticides (0.1 μg/L). Therefore, to preserve groundwater quality against deterioration it is necessary to define environmental groundwater thresholds for the non-regulated compounds.

  • Drugs of abuse in urban groundwater. A case study: Barcelona

     Jurado Elices, Anna; Mastroianni, Nicola; Vázquez Suñé, Enric; Tubau Fernandez, Isabel; Carrera Ramírez, Jesús; Pujades Garnes, Estanislao; Postigo, Cristina; López de Alda, Miren; Barceló Culleres, Damià
    Science of the total environment
    Vol. 424, p. 280-288
    DOI: 10.1016/j.scitotenv.2012.02.074
    Date of publication: 2012
    Journal article

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  • Barrier effect of underground structures on aquifers

     Pujades Garnes, Estanislao; López, Ander; Carrera Ramírez, Jesús; Vázquez Suñé, Enric; Jurado Elices, Anna
    Engineering geology
    Vol. 145-146, p. 41-49
    DOI: 10.1016/j.enggeo.2012.07.004
    Date of publication: 2012
    Journal article

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    Impervious structures below the water table modify the natural groundwater flow in aquifers. They act as barriers, causing heads to rise upgradient and to fall downgradient. We define the barrier effect as the increase in head loss across the barrier with respect to the natural conditions prior to construction. We distinguish between regional (the minimum head loss observed at long distances) and local (the maximum head loss observed close to the structure) barrier effects. We use numerical and analytical methods to derive semi-empirical equations to quantify the two barrier effects for semi-permeable, partially penetrating (or fully penetrating but finite in length), and barriers with a by-pass in confined aquifers. The resulting equations depend on the barrier geometry and on the natural head gradient in the aquifer and they are easy to apply. We test their validity at two construction sites, obtaining excellent agreement between the computed and observed barrier effects.

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    A sequence stratigraphic based geological model for constraining hydrogeological modeling in the urbanized area of the Quaternary Besòs delta (NW Mediterranean coast, Spain)  Open access

     Velasco Mansilla, Domitila Violeta; Cabello, P.; Vázquez Suñé, Enric; López Blanco, M.; Ramos, E.; Tubau Fernandez, Isabel
    Geologica acta
    Vol. 10, num. 4, p. 373-393
    DOI: 10.1344/105.000001757
    Date of publication: 2012-12-04
    Journal article

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    The Quaternary Besòs delta is located on the Mediterranean coast in NE Spain. The Besòs Delta Complex includes 3 aquifers constituted by 3 sandy and gravelly bodies, separated by lutitic units. These aquifers supply water for domestic and industrial use in this area. Management of groundwater has been problematic in the Besòs delta since the 1960s, and continues to pose major problems for subsurface engineering works in this highly urbanized region. This study seeks to demonstrate the advantages of detailed geological characterization and modeling for designing and constructing a hydrogeological model. Available information of the subsurface was compiled, integrated and homogenized in a geospatial database. The interpretation of these data enabled us to delimit geological units by means of a sequence stratigraphic subdivision. A three-dimensional facies belt-based model of the Besòs delta was built on the basis of this geological characterization. This model was used to constrain the distribution of hydraulic parameters and thus to obtain a consistent hydrogeological model of the delta, which was calibrated by data of water management and production over the last hundred years. The resulting hydrogeological model yielded new insights into water front displacements in the aquifer during the time-span considered, improving predictions in an attempt to optimize aquifer management.

    The Quaternary Besòs delta is located on the Mediterranean coast in NE Spain. The Besòs Delta Complex includes 3 aquifers constituted by 3 sandy and gravelly bodies, separated by lutitic units. These aquifers supply water for domestic and industrial use in this area. Management of groundwater has been problematic in the Besòs delta since the 1960s, and continues to pose major problems for subsurface engineering works in this highly urbanized region. This study seeks to demonstrate the advantages of detailed geological characterization and modeling for designing and constructing a hydrogeological model. Available information of the subsurface was compiled, integrated and homogenized in a geospatial database. The interpretation of these data enabled us to delimit geological units by means of a sequence stratigraphic subdivision. A three-dimensional facies belt-based model of the Besòs delta was built on the basis of this geological characterization. This model was used to constrain the distribution of hydraulic parameters and thus to obtain a consistent hydrogeological model of the delta, which was calibrated by data of water management and production over the last hundred years. The resulting hydrogeological model yielded new insights into water front displacements in the aquifer during the time-span considered, improving predictions in an attempt to optimize aquifer management.

  • Time-lapse cross-hole electrical resistivity tomography monitoring effects of an urban tunnel

     Bellmunt, F.; Ledo, J.; Queralt, P.; Falgas, E.; Marcuello, A.; Velasco Mansilla, Domitila Violeta; Vázquez Suñé, Enric; Benjumea Moreno, Beatriz
    Journal of applied geophysics
    Vol. 87, p. 60-70
    DOI: 10.1016/j.jappgeo.2012.09.003
    Date of publication: 2012-12
    Journal article

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    Tunnel construction in urban areas has recently become a topic of interest and has increased the use of tunnel boring machines. Monitoring subsurface effects due to tunnel building in urban areas with conventional surface geophysical techniques is not an easy task because of space constraints. Taking advantage of the construction of a new metro line in Barcelona (Spain), a geoelectrical experiment, which included borehole logging and time-lapse cross-hole measurements using permanent electrode deployments, was designed to characterise and to study the subsurface effects of the tunnel drilling in a test site. We present a case study in which the differences between time-lapse cross-hole resistivity measurements acquired before, during and after the tunnel drilling below the test site have been calculated using three different procedures: a constrained time-lapse inversion, a model subtraction and an inversion of the normalised data ratio. The three procedures have provided satisfactory images of the resistivity changes and tunnel geometry, but resistivity changes for the tunnel void were lower than predicted by modelling. This behaviour has been explained by considering a conductive zone around the tunnel. Further, an apparent resistivity pseudosection for the cross-hole data, equivalent to the case of the equatorial dipole¿dipole on the surface, is introduced.

    Tunnel construction in urban areas has recently become a topic of interest and has increased the use of tunnel boring machines. Monitoring subsurface effects due to tunnel building in urban areas with conventional surface geophysical techniques is not an easy task because of space constraints. Taking advantage of the construction of a new metro line in Barcelona (Spain), a geoelectrical experiment, which included borehole logging and time-lapse cross-hole measurements using permanent electrode deployments, was designed to characterise and to study the subsurface effects of the tunnel drilling in a test site. We present a case study in which the differences between time-lapse cross-hole resistivity measurements acquired before, during and after the tunnel drilling below the test site have been calculated using three different procedures: a constrained time-lapse inversion, a model subtraction and an inversion of the normalised data ratio. The three procedures have provided satisfactory images of the resistivity changes and tunnel geometry, but resistivity changes for the tunnel void were lower than predicted by modelling. This behaviour has been explained by considering a conductive zone around the tunnel. Further, an apparent resistivity pseudosection for the cross-hole data, equivalent to the case of the equatorial dipole–dipole on the surface, is introduced.

  • Excavación de un pozo profundo para revisión de una tuneladora en el centro de Barcelona

     Ledesma Villalba, Alberto; Lloret Morancho, Antonio; de Santos, C.; Ramos, Gonzalo; Vázquez Suñé, Enric; Alonso Pérez de Agreda, Eduardo; Pujades Garnes, Estanislao; Carrera Ramírez, Jesús
    Simposio Nacional de Ingeniería Geotécnica
    p. 807-817
    Presentation's date: 2012
    Presentation of work at congresses

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  • Geophysics and hydrogeology : will they ever marry?

     Martinez Landa, Lourdes; Perez Estaun, A.; Vázquez Suñé, Enric; Carrera Ramírez, Jesús
    American Geophysical Union Fall Meeting
    p. H42A-02-
    Presentation's date: 2012-12
    Presentation of work at congresses

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  • Drugs of abuse in urban groundwater. A case study: Barcelona

     Jurado Elices, Anna; Mastroianni, Nicola; Carrera Ramírez, Jesús; Vázquez Suñé, Enric; Tubau Fernandez, Isabel; Pujades Garnes, Estanislao; Postigo, Cristina; López de Alda, Miren; Barceló Culleres, Damià
    European Geosciences Union General Assembly
    p. 791-
    Presentation's date: 2012-04
    Presentation of work at congresses

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  • A methodology for characterizing the hydraulic effectiveness of an annular low-permeability barrier

     Vilarrasa Riaño, Victor; Carrera Ramirez, Jesus; Jurado Elices, Anna; Pujades Garnes, Estanislao; Vázquez Suñé, Enric
    Engineering geology
    Vol. 120, num. 1-4, p. 68-80
    DOI: 10.1016/j.enggeo.2011.04.005
    Date of publication: 2011-06
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  • Quantitative comparison of impeller-flowmeter and particle-size-distribution techniques for the characterization of hydraulic conductivity variability

     Barahona Palomo, Marco; Riva, Monica; Sanchez Vila, Francisco Javier; Vázquez Suñé, Enric; Guadagnini, Alberto
    Hydrogeology journal
    Vol. 19, num. 3, p. 603-612
    DOI: 10.1007/s10040-011-0706-5
    Date of publication: 2011-02-19
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  • Sedimentary media modelling platform for groundwater management in urban areas

     Gogu, Constantin Radu; Gaitanaru, Dragos; Chitu, Zenaida; Ionita, Angela; Palcu, Marin; Velasco Mansilla, Domitila Violeta; Vázquez Suñé, Enric; Batali, Loreta; Bica, Ioan
    European Geosciences Union General Assembly
    p. 1
    Presentation's date: 2011-04-03
    Presentation of work at congresses

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  • An approach to identify urban groundwater recharge

     Vázquez Suñé, Enric; Carrera Ramírez, Jesús; Tubau Fernandez, Isabel; Sanchez Vila, Francisco Javier; Soler Gil, Albert
    Hydrology and Earth system sciences
    Vol. 14, num. 10, p. 2085-2097
    DOI: 10.5194/hess-14-2085-2010
    Date of publication: 2010
    Journal article

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    Quantitative comparison of impeller flowmeter and particle-size dsitribution techniques for the characterization of hydraulic conductivity variability  Open access

     Barahona Palomo, Marco; Riva, Monica; Sanchez Vila, Francisco Javier; Vázquez Suñé, Enric; Guadagnini, Alberto
    European Geosciences Union General Assembly
    p. 1
    Presentation's date: 2010-05-02
    Presentation of work at congresses

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    Basic univariate statistics and key geostatistical parameters of estimates of hydraulic conductivity obtained at the decimeter scale by two different methods are presented and compared. The two estimates are based on (1) the empirical Kozeny-Carman formulation, and (2) impeller flowmeter tests. The former provides values of conductivity, KGS, based on particle size distributions. Impeller flowmeter techniques allow inferring conductivities, KFM, from measurements of vertical flows within a borehole. Data obtained during an extensive monitoring campaign at an experimental site located near the city of Tübingen, Germany, are considered. Statistics of the natural logarithm of KGS and KFM at the site are similar in terms of mean values (with averages of ln KGS being slightly smaller than those of ln KFM) and differ in terms of variogram ranges and sample variances. The correlation between the two sets of estimates is virtually absent. Additional data from two different sites already presented in the literature allow comparing conductivity estimates from flowmeter and grain-size distributions (or permeameter measurements) taken at adjacent wells and support the finding that KGS and KFM lack correlation. The analysis highlights the difficulty in obtaining meaningful quantitatively comparable hydraulic conductivity data at the decimetric scale.

  • GRUP HIDROLOGIA SUBTERRANEA

     Candela, Lucila; Jimenez Martinez, Joaquin; Batlle Pifarre, Francisco; Barbieri, Manuela; Fernandez Garcia, Daniel; Medina Sierra, Agustin; Saaltink, Maarten Willem; Bolster, Diogo; Martinez Landa, Lourdes; Vázquez Suñé, Enric; Pedretti, Daniele; Velasco Mansilla, Domitila Violeta; Custodio Gimena, Emilio; Dentz, Marco; Carrera Ramírez, Jesús; Jódar Bermúdez, Jorge; Castro Ledesma, Adolfo; Valhondo Gonzalez, Cristina; Silva Rojas, Orlando Enrique; Gogu, Constantin Radu; Pool Ramirez, Maria; de Pourcq, Katrien; Pujades Garnes, Estanislao; Vilarrasa Riaño, Victor; Sanchez Vila, Francisco Javier
    Competitive project

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    A methodology for analysing the drainage system in excavations between sheet pile walls  Open access

     Jurado Elices, Anna; Bolster, Diogo; Pujades Garnes, Estanislao; Vázquez Suñé, Enric; Carrera Ramírez, Jesús
    International Conference on Tunnel Construction and Underground Structures
    p. 93-98
    Presentation's date: 2009-09-16
    Presentation of work at congresses

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    The development of an underground station below the water table requires rigorous and careful planning. As such an in depth knowledge of the station construction designs and the related hydraulic behavior are required in order to design the most appropriated drainage system. Moreover, it is important to ensure the correct drainage of the excavation site to avoid liquefaction and to minimize water seepage. As an example of underground construction we consider the tunnel for the new line in the Barcelona metropolitan area (Línia 9) through the town of Prat de Llobregat in the Llobregat River’s delta, which is currently under development. Most of the tunnel sections are constructed with Tunnel Boring Machines (TBM) and the stations and the ventilation shafts are constructed using “Cut & Cover” technology between sheet pile walls. A typical station on the L9 line lies partially between the shallow and the main aquifer. Specifically, it is located in the middle layer which in made up of silts and clays. In order to design the most appropriated drainage system we present a methodology whereby we generalize the hydraulic problem. This method enables rapid and efficient estimation of fluxes as well as a general understanding of the problem in a simplified manner.

  • Hydrological modelling of the Vallcebre landslide

     Corominas Dulcet, Jordi; Martín, R; Vázquez Suñé, Enric
    10th Intl. Symp. on Landslides and Engineered Slopes
    p. 1
    Presentation of work at congresses

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  • Estimation of recharge from floods in disconnected stream-aquifer systems

     Vaquez-Suñé, E; Vázquez Suñé, Enric; Capino, B; Abarca, E; Carrera Ramírez, Jesús
    Ground water
    Vol. 45, num. 5, p. 579-589
    Date of publication: 2007-06
    Journal article

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  • Revisión del protocolo a seguir en el proceso de drenaje de las obras del AVE para el tramo l'Hospitalet-Torrassa

     Mascuñano, Eduard; Vázquez Suñé, Enric; Carrera Ramírez, Jesús
    Date: 2007-04
    Report

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  • The groundwater reponse to the tunnel advance: methodology of the groundwater modeling

     Vázquez Suñé, Enric
    ECCOMAS EURO:TUN 2007. ECCOMAS THEMATIC CONFERENCE ON COMUPTATIONAL METHODS IN TUNNELLING
    p. 1-12
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  • La sostenibilitat hidràulica de les ciutats: sobre les aigües subterrànies i d'altres fonts d'aigua

     Carrera Ramirez, Jesus; Vázquez Suñé, Enric; Sanchez Vila, Francisco Javier
    Date of publication: 2006-06
    Book chapter

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  • Optimal design of measures to correct seawater intrusion

     Vázquez Suñé, Enric
    Water resources research
    Vol. 42, num. W09415, p. 1-14
    Date of publication: 2006-09
    Journal article

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  • Groundwater modelling as a tool for the European Water Framework Directive (WFD) application: The Llobregat case

     Vázquez Suñé, Enric
    Physics and chemistry of the Earth
    Vol. 31, num. 17, p. 1015-1029
    Date of publication: 2006-11
    Journal article

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  • Construcció, neteja i desenvolupament de piezòmetres-II (23) L-9

     Jordi, Font; Vázquez Suñé, Enric; Sanchez Vila, Francisco Javier; Carrera Ramírez, Jesús
    Date: 2006-09
    Report

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  • Nota tècnica pou d'atac I

     Vázquez Suñé, Enric; Carrera Ramirez, Jesus
    Date: 2006-02
    Report

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  • Nota tècnica pou d'atac II

     Jordi, Font; Vázquez Suñé, Enric
    Date: 2006-03
    Report

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  • NOTA TÉCNICA SOBRE EL DRENAJE DURANTE LA EXCAVACIÓN DEL TÚNEL DEL AVE TRAMO L'HOSPITALET - TORRASSA

     Vázquez Suñé, Enric; Carrera Ramirez, Jesus; María, Pool; Ander, López; Desiré, Gàmez
    Date: 2006-03
    Report

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  • AVANCE DEL INFORME SOBRE PIES DE PANTALLA EN EL TRAMO HOSPITALET-TORRASSA (pk-300+500 a 302+050) DEL AVE

     Carrera Ramirez, Jesus; Vázquez Suñé, Enric; María, Pool
    Date: 2006-03
    Report

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