Now showing items 70-89 of 104

    Nomsothermal multiphase flow of brine and gas through saline media 

    Olivella Pastallé, Sebastià (Date of defense: 1995-07-12)

    Presentamos una formulación nueva para el análisis de problemas Termo-hidro-mecánicos en medios salinos. Esta formulación incluye, desde la obtención de ecuaciones de balance de masa, momento y energía hasta su resolución ...

    Occurrence and fate of emerging contaminants in urban groundwater. A case study : Barcelona 

    Jurado Elices, Anna (Date of defense: 2013-10-21)

    Ensuring good water quality is becoming a major challenge in urban areas. Urban aquifers may suffer pollution from different recharge sources such as water leakage from sewer and septic systems, seepage from rivers, seawater ...

    Passive Seismic Protection of Cable-Stayed Bridges Applying Fluid Viscous Dampers under Strong Motion 

    Valdebenito, Galo E. (Date of defense: 2009-05-29)

    Terremotos recientes han demostrado la gran vulnerabilidad de algunos puentes ante movimiento fuerte. Los de tipo atirantado constituyen una tipología estructural muy atractiva, y que actualmente es empleada para muchos ...

    Processes affecting the efficiency of limestone, aragonite and dolostone in passive treatments for AMD 

    Offeddu, Francesco G. (Date of defense: 2015-10-30)

    Waters from mines (acid mine drainage-AMD), contain elevated concentrations of SO-24, Fe and other contaminant metals, which can persist in the environment during centuries. The purpose of AMD treatments is to retain metals ...

    Proposal of energy spectra for earthquake resistant design based on turkish registers 

    Yazgan, Ahmet Utku (Date of defense: 2012-09-07)

    This work proposes design energy spectra in terms of an equivalent velocity, intended for regions with design peak acceleration 0.3 g or higher. These spectra have been derived through linear and nonlinear dynamic analyses ...

    Propuesta de espectros de energía para proyecto sismorresistente basados en registros de Colombia 

    Bravo González, Diego Andrés (Date of defense: 2010-06-18)

    Energy input spectra applicable to the seismic design of structures in moderate-to-high seismicity regions such as Colombia are proposed. They are derived from the bilinear envelope of individual spectra obtained for 144 ...

    Radar de subsuelo.Evaluación para aplicaciones en arqueología y en patrimonio histórico-artístico 

    Pérez Gracia, María de la Vega (Date of defense: 2001-10-26)

    .<br/>El georradar es una herramienta cada vez más utilizada en diferentes ámbitos geológicos, medioambientales y de Ingeniería Civil, así como en estudios de caracterización de yacimientos arqueológicos y de diagnóstico ...

    Recarga a los acuíferos españoles mediante balance hidrogeoquímico 

    Alcalá García, Francisco Javier (Date of defense: 2006-02-06)

    Esta tesis doctoral sienta las bases para calcular la recarga por la lluvia a los acuíferos por balance del ión cloruro (CMB), estimando en régimen estacionario y discutiendo su valor distribuido para todo el territorio ...

    Reconstrucción y análisis de ocurrencias regionales de múltiples eventos de movimientos en masa generados por lluvias históricas en los pirineos 

    Portilla Gamboa, Modesto Eusebio (Date of defense: 2014-10-28)

    En este documento de Tesis Doctoral, se presenta la recopilación, reconstrucción y análisis de los inventarios de movimientos en masa (MM) y los campos de lluvias para tres eventos históricos en los Pirineos, de los que ...

    Rendimiento, desgaste y abrasividad en excavación mecanizada de túneles en terrenos heterogéneos 

    González Páez, Claudia Verónica (Date of defense: 2014-10-20)

    Una base de datos de 33 km de registros de túnel de EPB en la zona de Barcelona se ha examinado en detalle desde el punto de vista de recambio de herramientas de corte y rendimiento de la excavación mecanizada. La base de ...

    Riego y fertilización nitrogenada en maíz (zea mays l.): efecto sobre el rendimiento del cultivo y la contaminación subterránea por nitratos 

    Poch Massegú, Ricard (Date of defense: 2012-03-30)

    Intensive farming often leads environmental consequences. This is the case of the study area of this thesis: the Empordà, a region with a variety of intensive crops (fruits, cereals, forage,...) and manifest problems of ...

    Risk managment of complex aquifers contaminated by chemical mixtures : numerical tools and human health risk assessment 

    Henri, Christopher (Date of defense: 2015-07-09)

    Human impact on groundwater resources has led to a rapid growth of social concerns worldwide owing to an increasing presence of toxic chemicals released in the subsurface. Risk assessment provides the scientific tool needed ...

    Robust damage detection in smart structures 

    Gharibnezhad, Fahit (Date of defense: 2014-04-07)

    This thesis is devoted to present some novel techniques in Structural Health Monitoring (SHM). SHM is a developing field that tries to monitor structures to make sure that they remain in their desired condition to avoid ...

    Scaling of subsurface processes in heterogeneous aquifers: from hydraulic testing to the use of memory functions 

    Willmann, Matthias (Date of defense: 2008-12-05)

    La heterogeneidad de la conductividad hidráulica es bien conocida, pudiendo cambiar varios órdenes de magnitud en poca distancia. Esto afecta nuestras observaciones de los procesos naturales. Para poder explicar la realidad ...

    Seawater intrusion in complex geological environments 

    Abarca Cameo, Elena (Date of defense: 2006-05-05)

    Modelling seawater intrusion (SWI) has evolved from a tool for understanding to a water management need. Yet, it remains a challenge. Difficulties arise from the assessment of dispersion coefficients and the complexity of ...

    Sediment-water interaction in a water reservoir affected by acid mine drainage : experimental and modeling 

    Torres Sánchez, Ester (Date of defense: 2013-11-15)

    The discharge of acid mine drainage into a water reservoir may seriously affect the water quality. In this setting, sediment is commonly thought to act as a sink for pollutants. However, redox oscillations in the bottom ...

    Seismic vulnerability analysis of midheight steel buildings in Bogotá 

    Montaña Peña, Miguel Ángel (Date of defense: 2015-02-09)

    A number of mid-height steel buildings have been erected recently in Bogotá. Their seismic risk might be high, given the new microzonation of Bogotá and the lack of comprehensive previous studies; noticeably, the response ...

    Sequence Stratigraphy as a tool for water resources management in alluvial coastal aquifers: application to the Llobregat delta (Barcelona, Spain) 

    Gámez Torrent, Desiré (Date of defense: 2007-12-20)

    Most coastal aquifers undergo seawater intrusion. Mitigating this risk depends on a sound knowledge of flow mechanisms, well located and constructed wells, an effective management, suitable policies and the desire to ...

    Simulació numèrica del moviment del sòl produït per terratrèmols. Aplicació a moviments febles i forts. 

    Figueras Vila, Sara (Date of defense: 1994-07-06)

    La Tesi s'emmarca en els estudis de risc sísmic que es duen a terme en Servei Geològic de Catalunya, la contribució d'aquest treball a aquests estudis ha consistit en la determinació precisa del moviment sísmic que es pot ...

    Técnicas innovadoras para la evaluación del riesgo sísmico y su gestión en centros urbanos: Acciones ex ante y ex post 

    Carreño, M. L. (Martha Liliana) (Date of defense: 2006-09-14)

    The objectives of this thesis are: the ex ante seismic risk evaluation for urban centers, the disaster risk management evaluation and the ex post risk evaluation of the damaged buildings after an earthquake. A complete ...