Relevant bibliographies by topics / Geology, General / Dissertations / Theses
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Dissertations / Theses on the topic 'Geology, General'

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Published: 4 June 2021
Last updated: 30 January 2023

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1

Abdurahman, Zuber. "Geology and geochemistry of the Chenaux gabbro, near Renfrew, Ontario." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5056.

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2

Cullen, R. D. "Structural geology and metamorphism of archean volcanic and sedimentary rocks at Fenton Lake, Slave Province, N.W.T." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5794.

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3

Billur, Basak. "Geology And Petrology Of Beypazari Granitoids: Yassikaya Sector." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605577/index.pdf.

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Beypazari Granitoid is a low temperature and shallow-seated batholite intruded the Tepek&ouml<br>y metamorphic rocks of the Central Sakarya Terrane. Composition of the granitoid varies from granite to diorite. The granitoid is unconformably overlain by Palaeocene and Eocene rock units. Thus the age is probably Late Cretaceous. The Beypazari Granitoid comprises mafic microgranular enclaves. The granitoid mainly consists of quartz, plagioclase, orthoclase and minor amphibole, biotite, chlorite, zircon, sphene, apatite, and opaque minerals. Plagioclase shows sericitation whereas biotite and hornb
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4

Stevenson, Mark Andrew. "Carbon cycling in Arctic lakes : sedimentary biomarker reconstructions from Disko Island, West Greenland." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/46579/.

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A palaeolimnological study of three lakes on Disko Island, West Greenland was conducted across a hydrogeomorphic landscape gradient, to reconstruct principally changes in algal pigments, lipid biomarkers and carbon isotopes (δ13C) to investigate carbon cycling at multiple scales and resolutions. All three records reconstructed recent change on Disko, with records from lake Disko 2 additionally spanning since ~7640 cal. yr BP and lake Disko 4 since ~1260 cal. yr BP. Changes in sedimentary proxies were broadly consistent with the spatially and temporally heterogeneous environmental change known
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5

Dassow, Jessica Maria Irmgard. "Sensing and understanding the resilience of sandstone." Thesis, University of Glasgow, 2019. http://theses.gla.ac.uk/41087/.

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When stones are incorporated into buildings their mineralogical composition and texture alters to adapt to the new environmental conditions. One of the most common building stones in Scotland is sandstone. Due to its high porosity and mineralogical composition sandstones can be prone to weathering. Scotland's diverse stone built heritage is endangered by frequent changes in environmental conditions such as cyclic wetting and drying and temperature changes caused by insolation. Buildings also face increased pressure through climate change. In Scotland, the decay of sandstone is a serious proble
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6

Cuthbertson, Alan J. S. "The motion of fine sand particles in turbulent open channel shear flows over porous bed conditions." Thesis, University of Glasgow, 2001. http://theses.gla.ac.uk/2489/.

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The current study aims to investigate the physical mechanisms controlling fine sediment transport within open channel shear flows over porous beds, with particular emphasis on the role of flow turbulence in particle settling and deposition processes. Preliminary visualisation experiments used a VHS camera to observe the near-bed motion of sand particles and their behaviour within the surface layer of a rhombically-packed bed of uniform spheres. Measurement of near-bed particle trajectories indicate that turbulent particle fall velocities w's are generally larger than fall velocities measured i
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7

McGinty, Kevin. "The stress-strain behaviour of Bothkennar clay." Thesis, University of Glasgow, 2006. http://theses.gla.ac.uk/2608/.

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This thesis describes the findings of an experimental and numerical investigation into the mechanical behaviour of a soft clay. Chapter 1 outlines the need for continued research on soft clay behaviour. The aims and objectives of the work are set out, as well as the structure of the research. The mechanical behaviour of soft clays has been reported by a large number of researchers and the findings of thee are considered in Chapter 2. A review of Bothkennar clay is given. Chapter 3 sets out the details of two constitutive models, whose purpose is to model the efforts of plastic anisotropy and d
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8

Voulgari, Chrysoula. "Engineering modelling of the progressive retreat of cliffs." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/91958/.

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In this thesis, the morphologic evolution of uniform c, φ slopes subject to successive failures is investigated. The research is conducted in two parts; the analytical part (employing the limit analysis upper bound method) and the experimental (by small scale model tests). An experimental prototype model to study the influence of water infiltration on the morphologic evolution of natural cliffs subject to progressive retreat is presented. A set of small scale laboratory tests is designed to investigate successive failures. The failure is reached by applying rainfall on the slope through a rain
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9

Madun, Aziman. "Seismic evaluation of vibro-stone column." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3370/.

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Ground improvement work is crucial in enhancing the characteristics of weak soils commonly encountered in Civil Engineering, and one such technique commonly used is vibro-stone columns. An assessment of the effectiveness of such an approach is critical to determine whether the quality of the works meets the prescribed requirements. Conventional quality testing suffers limitations including: limited coverage (both area and depth) and problems with sampling quality. Traditionally quality assurance measurements use laboratory and in-situ invasive and destructive tests. However geophysical approac
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10

Bui, Man T. "Influence of some particle characteristics on the small strain response of granular materials." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/72977/.

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The key parameters representing the small strain response of geomaterials are the very small strain shear modulus, Gmax, shear modulus degradation G/Gmax, and damping ratio. These are also important parameters in the design of foundations where only small deformation takes place. A review of the literature suggests that shear modulus and damping ratio at small strain are significantly influenced by void ratio and mean effective stress. They are also influenced by other parameters such as confinement time, anisotropy, number of loading cycles, and OCR, etc. However, there was little evidence in
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11

Rees, Emily V. L. "Methane gas hydrate morphology and its effect on the stiffness and damping of some sediments." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/79442/.

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Gas hydrates are ice–like compounds found in deep sea sediments and permafrosts. Concise detection and quantification of natural methane gas hydrate deposits, will allow for a more robust assessment of gas hydrate as a potential energy resource or natural geohazard. Current seismic methods, used to identify and quantify gas hydrates, have proved to be unreliable in providing accurate information on the extent of natural gas hydrate deposits, due to the lack of understanding on how gas hydrate affects the host sediment. Direct measurement of some hydrate bearing sediment properties has been mad
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12

D'Apolito, Carlos. "Landscape evolution in Western Amazonia : palynostratigraphy, palaeoenvironments and diversity of the Miocence Solimões Formation, Brazil." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6781/.

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During the Miocene (23.03 to 5.33 Ma), western Amazonia experienced major changes in its geography and biodiversity as a response to Andean uplift. To better understand these changes, the palynology of the Solimões Formation (NW Brazil) is presented with the objective of providing age control, and establishing palaeoenvironments and pollen richness within the framework of geological and climatic events. The ninety-five palynological samples yield 491 palynomorphs, of which 76 pollen and 25 spores are new. Correlation with a nearby calibrated biozonation resulted in ages from 18.7 to 10.7 Ma (l
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13

Omeru, Tuviere. "Mass transport deposits : implications for reservoir seals." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/64667/.

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This thesis uses a combination of two-dimensional (2D) and three-dimensional (3D) seismicreflection data to investigate the morphology and internal architecture of mass transport deposits (MTDs) from the west Nile delta, offshore Egypt and from the Deepwater Taranaki Basin, New Zealand. The overall aim of the project is to gain an improved understanding of the impact of MTDs on hydrocarbon seals. To this end a novel seismic based classification for MTDs that is directly mappable onto the problem of defining their potential as sealing sequences is proposed based on results of investigations fro
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14

Gamboa, Davide Alexandre. "An integrated seismic-scale analysis of reservoir compartmentalisation on continental margins : the Espirito Santo Basin, SE Brazil." Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/24180/.

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Deepwater continental margins constitute one of the ultimate exploration frontiers where giant oilfields have been discovered. These comprise reservoirs units affected by multi‐scale compartmentalisation resultant from stratigraphic, structural and/or diagenetic processes that compromise the lateral and/or vertical connectivity of permeable strata. A 3D seismic dataset from the deepwater Espírito Santo Basin (SE Brazil) was analysed to assess and quantify the architectural elements that influence the compartmentalisation of reservoir units. Mass‐Transport Deposits (MTDs) have growing importanc
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15

Campanile, Daniel J. "The post-breakup evolution of the western Indian high-elevation passive margin." Thesis, Connect to e-thesis, 2007. http://theses.gla.ac.uk/38/.

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Thesis (Ph.D.) - University of Glasgow, 2007.<br>Ph.D. thesis submitted to the Department of Geographical and Earth Sciences, Physical Sciences Faculty, University of Glasgow, 2007. Includes bibliographical references. Print version also available.
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16

Campbell, Nicola S. "The use of rockdust and composted materials as soil fertility amendments." Thesis, University of Glasgow, 2009. http://theses.gla.ac.uk/617/.

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This thesis aims to investigate the use of two materials: rockdust and greenwaste compost for use as soil fertility amendments. A field trial was conducted over three years to investigate the impact these materials had on plant yield, plant nutrient content, soil chemistry and soil microbial communities in direct comparison with chemical fertilizer and farmyard manure. There were annual applications of compost, manure and chemical fertilizer in spring with one rockdust application in the autumn prior to the first year of the trial. Two harvests were carried out each year in summer and autumn t
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17

Mellor, Christopher Joseph. "Arctic water source dynamics, stream habitat and biodiversity in a changing climate : a field-based investigation in Swedish Lappland." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3689/.

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The dynamic interaction between different water sources plays a key role in the structure and functioning of Arctic stream systems. Ice melt, snowmelt, groundwater and rainfall mix to produce a diverse range of physicochemical conditions. The heterogeneous habitat matrix created is home to a variety of cold stenothermic species. Recent trends in earth surface temperatures associated with global warming have co-in sided with a reduction in global glacier mass balance and a hastening in the onset of spring thaw. This field based study investigated the physicochemical habitat diversity within a g
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18

Ben-Shaban, Yousef Ali. "Radionuclide movement and geochemistry in intertidal sediments in South West Scotland." Thesis, University of Glasgow, 1989. http://theses.gla.ac.uk/40925/.

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This thesis describes a study of the distribution and behaviour of natural and manmade radionuclides in the intertidal environment of south west Scotland. This work is particularly concerned with transport processes affecting radionuclides and with the application of radionuclides as tracers of natural environmental processes. Results are presented for study sites at Ardmore Bay in the Clyde Sea Area and Skyreburn Bay, Wigtown Martyr's Stake and Netherclifton in the Solway Firth with the radionuclides investigated being 134Cs, 137Cs, 210Pb, 238Pu, 239. 240Pu 241 Am, 238U, 232Th and 230Th. The
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19

Jones, Kimberley. "The application of iron oxide based photocatalysts in chromium photoredox chemistry." Thesis, University of Central Lancashire, 2011. http://clok.uclan.ac.uk/2811/.

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Chromium(VI) is a reactive and highly toxic pollutant species which is present in certain industrial effluent streams as well as sea water and polluted ground water. Chromium(III), however, is relatively inert and less toxic. Conventional methods used to eliminate Cr(VI) from aqueous phase include its reduction to Cr(III) at acidic pH by reaction with strong reducing agents such as thiosulphate, FeSO4 and SO2, followed by precipitation as hydroxide in alkaline media. However, this procedure is not suitable for Cr(VI) elimination in dilute aqueous solutions. Thus, semiconductor photocatalysis h
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20

Simon, Margit Hildegard. "Ocean and land climate dynamics off southeast Africa during the late Pleistocene : a multi-proxy approach." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/69701/.

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The Agulhas Current transport of heat and salt from the Indian Ocean into the South Atlantic around South Africa (Agulhas leakage), can affect the Atlantic Meridional Overturning Circulation (AMOC) and, thus, influence global climate. Upper water column reconstructions in the southwest Indian Ocean over the past 100 kyr based on marine sediments from the core region of the Agulhas Current suggest that surface ocean temperature, salinity and planktonic foraminiferal assemblage records from the Agulhas Current exhibit high variability on orbital to millennial timescales. A high degree of similar
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21

Hicks, Stephen Paul. "Seismic properties and processes along the subduction plate interface : the Februrary 2010 Mw 8.8 Maule, Chile earthquake." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2036999/.

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The seismogenic zone of subduction margins has the potential to generate some of the world’s largest earthquakes. A detailed study of the 2010 Mw 8.8 Maule, Chile rupture has enabled interpretation of the controls that govern subduction zone seismic behaviour across the earthquake cycle. In this thesis, we focus on two aspects of the central Chile margin: (1) imaging physical properties in the forearc and along the plate interface; (2) assessing source complexity of megathrust ruptures. We exploit a dataset of seismic body wave onset times from local aftershocks recorded on a temporary network
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22

Bezerra, Luiz Josà Cruz. "CaracterizaÃÃo dos tabuleiros prÃ-litorÃneos do Estado do CearÃ." Universidade Federal do CearÃ, 2009. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=3314.

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A zona costeira cearense tem aproximadamente 600 km de extensÃo, distribuÃda em diversas unidades geoambientais. O foco deste trabalho sÃo os Tabuleiros PrÃ-LitorÃneos, moldados em rochas da FormaÃÃo Barreiras, de Paleodunas e Dunas. O plano amostral à composto de 71 poÃos rasos totalizando 360 amostras distribuÃdas por toda zona de Tabuleiros. Por intermÃdio de anÃlises granulomÃtricas, teor de carbonato, morfoscopia, geomorfologia por sensoriamento remoto e determinaÃÃo dos teores de metais em 9. Pelos parÃmetros analisados foi descoberto que a zona de dunas costeiras (paleodunas) nÃo se lim
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23

Lukes, Laura. "Analysis of Model-driven vs. Data-driven Approaches to Engaging Student Learning in Introductory Geoscience Laboratories." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/9906.

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Increasingly, teachers are encouraged to use data resources in their classrooms, which are becoming more widely available on the web through organizations such as Digital Library for Earth System Education, National Science Digital Library, Project Kaleidoscope, and the National Science Teachers Association. As "real" data becomes readily accessible, studies are needed to assess and describe how to effectively use data to convey both content material and the nature of scientific inquiry and discovery. In this study, we created two introductory undergraduate physical geology lab modules for cal
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Sirinyildiz, Tunc. "Integration Of Geophysical - Geological Data Using Geographic Information Systems." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/1206374/index.pdf.

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This study attempts to integrate geophysical data with other spatial data using Geographic Information Systems (GIS). The study is carried out in a part of Galatean Volcanic Province, north of Ankara. Gravity, magnetic, topographic, rock type and volcanic eruption center data are the data layers used in the study. All data layers are converted to raster format with a grid spacing of 100 m. The first step in the analysis is the pair-wise analyses of all data layers. For the geophysical data, different layers for the depths of 1 to 5 km are generated. All paired analyses indicate that geophysic
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25

Johnson, Richard Michael. "Torrent erosion in Lake District mountain catchments." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/1659/.

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This thesis investigates torrent erosion in Lake District mountain catchments, Northern England. A nested research approach was used. Detailed investigations were undertaken at two case study sites (Iron Crag, Raise Beck) together with a survey of torrents across the Skiddaw and Helvellyn massifs. At Iron Crag an annual sediment budget was constructed by monitoring hillslope, channel and fan processes. Particle size characteristics of sediments, and the history of fan development were investigated. Results show channel and bank sediments are the main source of material supplied to the fan. Lar
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26

Li, Yao. "Shear behaviour of sand in bi-directional direct simple shear tests." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/37279/.

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In geotechnical engineering, soil is subject to shear stress, as well as normal stress. In many cases, soil is sheared along multiple directions, such as an embankment under earthquake loading and foundation soil of a structure under a complex loading. In recent years, significant research has been devoted to understanding the static and cyclic shear behaviour of sand under complex stress conditions. To investigate the shear behaviours of soils, a few testing devices have been specifically developed. The most commonly used apparatuses are direct shear, direct simple shear, and hollow cylinder
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27

Mathers, Hannah. "The impact of the Minch palaeo-ice stream in NW Scotland : constraining glacial erosion and landscape evolution through geomorphology and cosmogenic nuclide analysis." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5302/.

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The British-Irish Ice Sheet (BIIS) is predicted to have deglaciated rapidly from ~ 18 ka, in response to rising sea level and temperature, similar forcings experienced by modern polar ice sheets. As the main conduits of ice mass loss, the reaction of ice streams to these forcings is thought to have been central in determining the mode and timing of this deglaciation. However, lack of understanding of ice stream influence on the glaciology and deglaciation of ice sheets limits confidence in ice sheet model predictions. NW Scotland is an area of the last BIIS predicted to have been dominated by
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28

Wang, Zhe. "Numerical simulations of geotechnical engineering problems considering the principal stress rotation." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/32610/.

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Soil behaviors are quite complex under dynamic loadings, such as wave loading, earthquake loading, etc, but they share common characteristics that the soil is subjected to considerable principal stress rotations (PSR). PSR can generate plastic deformation even without a change of principal stress magnitudes. Continuous PSR can also generate excess pore water pressures and cumulative shear strains in undrained condition. Therefore, the PSR from the dynamic loadings can accelerate undrained soil liquefaction because it can cause cumulative plastic volumetric deformations. Ignoring PSR induced de
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Curioni, Giulio. "Investigating the seasonal variability of electromagnetic soil properties using field monitoring data from Time-Domain Reflectometry probes." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4255/.

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Shallow geophysical techniques such as Ground Penetrating Radar (GPR) have been widely used to detect buried utilities. However, these techniques are influenced by ground properties such as the electromagnetic (EM) and geotechnical soil properties. This research focused on the long-term monitoring of these soil properties in the field in order to establish the amount, and the causes, of variation and their impact on GPR results. A Time-Domain Reflectometry monitoring station was developed and was installed in an anthropogenic sandy soil at the University of Birmingham campus (UK). The monitori
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30

Oktay, Emre Hasan. "Finite Element Analysis Of Laboratory Model Experiments On Behavior Of Shallow Foundations Under General Loading." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614210/index.pdf.

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In this study, a series of laboratory model experiments carried on shallow foundations is intended to be simulated through numerical modeling. The laboratory model tests were conducted by Fukui et al. (2005), over square shaped, shallow surfacial foundations located over air-dried Toyoura sand. Tests included centered vertical and combined loading cases on sand with 60% and 80% relative densities. Plastic limit loads obtained from numerical analyses and available analytical solutions in literature are compared to the laboratory test results and the differences are discussed. Employment of Moh
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31

Compson, Zacchaeus Greg. "An Isotopic Examination of Cave, Spring and Epigean Trophic Structures in Mammoth Cave National Park." TopSCHOLAR®, 2004. http://digitalcommons.wku.edu/theses/1102.

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AN ISOTOPIC EXAMINATION OF CAVE, SPRING AND EPIGEAN TROPHIC STRUCTURES IN MAMMOTH CAVE NATIONAL PARK Name: Zacchaeus Greg Compson Date: October 15, 2004 Pages: 56 Directed by: Philip Lienesch, Doug McElroy, Michael Stokes and Richard Bowker Department of Biology Western Kentucky University Abstract High-water events in the Green River result in flow-reversals which flush native and introduced fishes into Mammoth Cave, posing threats to indigenous cave fauna. However, little is known about the trophic interactions between
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Rushton, Elizabeth A. C. "'Under the shade I flourish' : an environmental history of northern Belize over the last three thousand five hundred years." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/27615/.

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Environmental histories are multi-dimensional accounts of human interaction with the environment over time. They observe how and when the environment changes (material environmental histories), and the effects of human activities upon the environment (political environmental histories). Environmental histories also consider the thoughts and feelings that humans have had towards the environment (cultural/ intellectual environmental histories). Using the methodological framework of environmental history this research, located in sub-tropical northern Belize, brings together palaeoecological reco
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Schillereff, Daniel. "Lake sediment records of flood frequency and magnitude." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2007561/.

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The recent spate of floods in many parts of Britain has stimulated substantial interest among scientists, policy makers and the public concerning contemporary trends in flood frequency and magnitude, in particular questioning whether these events exceed historical extremes. However, detecting a clear signal of recent intensification in the flood regime is hampered by the relatively short timescales covered by meteorological and river flow data. Lake sediment sequences have proven a valuable archive of historical flooding over centennial and millennial timescales elsewhere in Europe and globall
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Erol, Gokhan. "Gis-based Microzontion Of Niksar (tokat) Settlement Area For The Purpose Of The Urban Planning." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12611370/index.pdf.

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Niksar (Tokat), is an urban area located in a seismically active zone of Turkey. The aim of this thesis is to prepare GIS-based microzonation map of Niksar settlement area for the purpose of urban planning. Liquefaction, activity, slope, aspect, fault proximity, ground amplification and lithology are considered during the overlay analysis by using Multicriteria Decision Making Analysis (MCDA) of Simple Additive Weighing (SAW) and Analytical Hierarchical Process (AHP) methods. Based on the evaluations, the study area is divided into four different zones, namely, (1) areas suitable for settlemen
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Weber, Robert Joseph. "An experimental study of fractionation of the rare earth elements in poplar plants (Populus eugenei) grown in a calcium-bearing smectite soil." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/935.

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Zha, Yuanyuan, Tian-Chyi J. Yeh, Walter A. Illman, et al. "Incorporating geologic information into hydraulic tomography: A general framework based on geostatistical approach." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/624351.

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Hydraulic tomography (HT) has become a mature aquifer test technology over the last two decades. It collects nonredundant information of aquifer heterogeneity by sequentially stressing the aquifer at different wells and collecting aquifer responses at other wells during each stress. The collected information is then interpreted by inverse models. Among these models, the geostatistical approaches, built upon the Bayesian framework, first conceptualize hydraulic properties to be estimated as random fields, which are characterized by means and covariance functions. They then use the spatial stati
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Valenzuela, Hernández David Alejandro. "Geopatrimonio de las unidades volcánicas y plutónicas del sector oriental del Lago General Carrera: Selección, caracterización y estrategias de divulgación." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/146094.

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Geólogo<br>Aysén corresponde a la región con menor densidad poblacional de Chile con 0.8 hab/km2 en una superficie de 108.494 km2. Debido a esto actualmente existe un vasto territorio que aún se conserva prístino, lo que da cuenta de la impresionante naturaleza biótica y abiótica, haciendo posible reconocer una diversidad geológica única y propia de la región. Por lo antes mencionado, la región de Aysén representa una zona ideal para proteger el patrimonio geológico presente, lo que ha motivado iniciativas como el programa Transferencia para una estrategia de gestión del patrimonio geológic
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Aliaga, Aliaga Guillermo Enrique. "Caracterización geoquímica de los suelos en la Cuenca de Rancagua (34°S-34°15'S y 70°30'0-71°O). Región del Libertador General Bernardo O'Higgins." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/140777.

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Geólogo<br>El presente trabajo se realizó en el marco del proyecto Geología para el Ordenamiento Territorial y la Gestión Ambiental en el área de Rancagua , desarrollado por el Servicio Nacional de Geología y su objetivo es caracterizar, por medio de la geoquímica, la condición actual de los suelos urbanos y agrícolas en la Depresión Central en el área de Rancagua. La primera metodología utilizada, considera el procesamiento matemático-estadístico de la base de datos obtenida a partir de los análisis químicos de las muestras levantadas en los suelos presentes en el área de estudio. A parti
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Rytel, Alexander L. "Hydrous Mineral Stability in Earth’s Mantle: Implications for Water Storage and Cycling." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1452168411.

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Martínez, López Javier. "Establecimiento y modelización de indicadores vegetales del estado ecológico de humedales mediterráneos semiáridos salinos= Modelling and establishment of plant indicators of ecological status for semiarid mediterranean saline wetlands." Doctoral thesis, Universidad de Murcia, 2014. http://hdl.handle.net/10803/132962.

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En 1971 el convenio internacional RAMSAR sobre la Conservación de los Humedales y las Aves Acuáticas comienza ya a fomentar la investigación sobre los humedales, refiriéndose a la necesidad de una mejor información científica para evaluar correctamente la situación de los mismos. Más recientemente la Directiva Marco Europea del Agua (DMA) establece que son precisos principios comunes para mejorar la protección de las aguas comunitarias en sus aspectos cuantitativos y cualitativos y proteger los ecosistemas acuáticos, así como los humedales que dependen directamente de ellos. Este es el caso de
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Espinosa, Martínez Sara. "Estimación de la recarga media anual de acuíferos : aplicación al Baix Ebre." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/283983.

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To test the applicability of atmospheric chloride deposition balance and soil water balance in the estimation of aquifer recharge , the chosen area is Vall Baixa de I'Ebre. This is a coastal area of semi-arid climate, which is located to the northeast of the Iberian peninsula, between Tortosa and Morella, where field experimentation has been carried out. The aquifer is hydrodynamically complex. It comprises the Plana de La Galera, between the rivers Ebro and La Senia, and part of Els Ports de Beseit-Tortosa, a high mountainous carbonate mass if. The average annual rainfall is 550 mm.yr-1 in th
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Pinyol, Puigmartí Núria Mercè. "Landslides in reservoirs: a coupled thermo-hydromechanical approach." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/6275.

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La ocurrencia de deslizamientos es uno de los principales problemas presentes durante el diseño, construcción y explotación de presas y embalses. La inundación del pie de los taludes, así como el desembalse rápido, pueden provocar primeras roturas o reactivar antiguos deslizamientos, existentes con frecuencia en el entorno de los embalses. Esta Tesis se centra en el caso particular de los deslizamientos en las márgenes de embalses en los que una masa de terreno desliza sobre una superficie de corte bien definida sin que se observe una intensa degradación del material movilizado. En la primera
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Sanderson, Louis M. "Changes in Fish Diversity Due To Hydrologic and Suspended Sediment Variability in the Sandusky River, Ohio: A Genetic Programming Approach." Bowling Green State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1245699638.

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Willis, Frank Levins. "A Multidisciplinary Approach for Determining the Extents of the Beds of Complex Natural Lakes in Louisiana." ScholarWorks@UNO, 2009. http://scholarworks.uno.edu/td/988.

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In Louisiana, the beds of natural lakes are owned by the state. The locations of property boundary lines separating state property from private lands have usually been set by determining the levels of natural monuments known as ordinary high water marks. The term is confusing and subjective, leading to controversy in reference to its determination. Catahoula Lake in central Louisiana was chosen as a study site because of its large size, its 20-foot variation in water levels, and its low-relief perimeter. Geology, geomorphology, hydrology, archaeology, vegetation, dendrochronology and den
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Fabró, F. (Ferran). "Análisis de la actividad de rayos y de tormentas relacionadas con la producción de rayos gamma terrestres." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/287987.

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Terrestrial Gamma ray Flashes (TGFs) have been known since 20 years ago, but since the first moment of the discovery it was clear that they were related to lightning and thunderstorms. The latest studies revealed that TGFs could be produced during the first stages of the lightning within thunderclouds by a process which is very similar to the X-ray emissions from natural lightning observed from ground or discharges in high voltage laboratory. The study of such phenomena will help to extend and complete the knowledge about lightning and electrical discharges. This study compares geographic, mon
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Pujades, Garnes Estanislao. "Interaction between groundwater and underground constructions." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/127151.

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Underground constructions below the water table may be problematic if the role of groundwater is not properly acknowledged. Difficulties worsen in urban environments. Two aspects should be taken into account in the interaction between underground constructions and groundwater, 1) the impacts caused by the construction in the aquifers and 2) the difficulties that groundwater causes during the construction. Therefore, the design of an underground construction must be minimize the impacts in the underground environment as well as guaranteeing the safety of the workers and the integrity of adjace
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Portilla, Gamboa Modesto Eusebio. "Reconstrucción y análisis de ocurrencias regionales de múltiples eventos de movimientos en masa generados por lluvias históricas en los pirineos." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/284214.

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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 se tenía poco conocimiento: Molló-Queralbs (octubre de 1940), Barruera-Vielha (agosto de 1963) y Berga-Cercs (junio de 2008). De éstos se recopiló información a partir de fuentes secundarias, fotografías aéreas de las respectivas épocas y se obtuvieron los inventarios de movimientos en masa mediante la digitalización de las cicatrices de las roturas con el uso de sistemas de in
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Zambrano, Nájera Jeannette. "Estimación de la producción y transporte de sedimentos en cuencas urbanas pequeñas a escala de evento mediante un modelo de base física basado en SIG." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/299372.

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Huge modifications have been made to landscape or urban watersheds, especially in twentieth century, caused by increases in urbanization have led to progressive increases in runoff flows and therefore sediment production. These conditions are exacerbated in climates with high rainfall intensities and short duration, such as those occurring in the Mediterranean Coast. These sediments especially coarse sediments can cause erosion problems and obstruction of drainage systems which in turns reduce hydraulic capacity. For these reasons, it is more and more important to study of sediment productio
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Lakshmikantha, M. R. "Experimental and theoretical analysis of cracking in drying soils." Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/352470.

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The thesis focuses on the experimental and theoretical aspects of the process of cracking in drying soils. The results and conclusions were drawn from an exhaustive experimental campaign characterised by innovative multidisciplinary aspects incorporating Fracture Mechanics and classical Soil mechanics, aided with image analysis techniques. A detailed study of the previous works on the topic showed the absence of large scale fully monitored laboratory tests, while the existing studies were performed on already cracked soil, rather than focusing on the process of cracking. Also, the absence of a
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Abancó, i. Martínez de Arenzana Clàudia. "Monitoring and geomorphologic characterization of debris flows at catchment scale." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/128677.

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Debris flows are very fast mass movements and are considered as one of the most hazardous phenomenain mountainous regions. Research on this field has strongly improved during the last decades. However,many open questions remain concerning the details of the triggering mechanisms of this type of phenomena and their dynamic behaviour; both of them key points in the hazard assessment. The global purpose of this work is to improve some aspects of the debris-flow hazard assessment atcatchment scale; particularly the estimation of the events¿ magnitude, the determination of their intensity and the
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