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Dissertations / Theses on the topic 'Topographic flow'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Marklund, Lars. "Topographic Control of Groundwater Flow." Doctoral thesis, KTH, Mark- och vattenteknik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11153.

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Gravity is the main driving force for groundwater flow, and both landscape topography and geology distribute the effects of gravity on groundwater flow. The groundwater table defines the distribution of the potential energy of the water. In humid regions where the bedrock permeability is relatively low and the soil depth is sufficiently shallow, the groundwater table closely follows the landscape topography and, thus, the topography controls the groundwater circulation in these regions. In this thesis, I investigate multi-scale topography-controlled groundwater flow, with the goal of systemat

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2

Holt, Jason Tempest. "Topographic influences on Kelvin-Helmholtz instability." Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295515.

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3

Marks, Kathryn Jean. "Enhanced flood hydraulic modelling using topographic remote sensing." Thesis, University of Bristol, 2001. http://hdl.handle.net/1983/e9866673-d6aa-49b5-964c-ed984940801c.

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4

Wichura, Henry. "Topographic evolution of the East African Plateau : a combined study on lava-flow modeling and paleo-topography." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5236/.

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The East African Plateau provides a spectacular example of geodynamic plateau uplift, active continental rifting, and associated climatic forcing. It is an integral part of the East African Rift System and has an average elevation of approximately 1,000 m. Its location coincides with a negative Bouguer gravity anomaly with a semi-circular shape, closely related to a mantle plume, which influences the Cenozoic crustal development since its impingement in Eocene-Oligocene time. The uplift of the East African Plateau, preceding volcanism, and rifting formed an important orographic barrier and tec

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5

Milne, Fraser Dalton. "Topographic and material controls on the Scottish debris flow geohazard." Thesis, University of Dundee, 2008. https://discovery.dundee.ac.uk/en/studentTheses/eb4a6b03-8024-4818-8e92-ce1fd3c77209.

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Debris flows can be considered the most significant geological hazard in areas of high relief in Scotland having impacted upon slope foot infrastructure several times in recent years. The potency of this geohazard is anticipated to increase over the coming decades due to a climatologically enforced upturn in debris flow frequency. In thisresearch material and topographic controls on debris flow activity are investigated using a combination of field and laboratory based analysis of debris flows at six study sites across upland Scotland. Centrifuge modelling is also used to simulate theinitiatio

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6

Rizo, Steven R. "Quantifying the Effect of Topographic Slope on Lava Flow Thickness: A First Step to Improve Lava Flow Volume Estimation Methods." Scholar Commons, 2018. http://scholarcommons.usf.edu/etd/7222.

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The volume of lava flows provide important information on the magnitude of volcanic eruptions, and accurate volumes are necessary to produce reliable models of lava flow emplacement or constrain the internal structure of volcanoes. The most accurate lava flow volumes are obtainable when the topography before and after an eruption are both known, but information for the topography before lava flow emplacement is absent in non-historic lava flows. To calculate the volume of non-historic lava flows, this pre-emplacement topography needs to be reconstructed. Common methods for this include using i

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7

CUCCHIARO, SARA. "Assessing sediment dynamics and check dams efficiency in a debris-flow catchment using multi-temporal topographic surveys." Doctoral thesis, Università degli Studi di Trieste, 2019. http://hdl.handle.net/11368/2962385.

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Torrent control works have always been a fundamental tool for preventing torrential hazard in mountain catchments, where the sediment transport phenomena as debris flows are one of the most dangerous geomorphic processes affecting small steep basins. The linkages between sediment source areas on the hillslopes and channel network, along with the temporal and spatial distributions of channel storage, are key controls of debris-flow occurrence and magnitude. Consequently, the prevention of natural hazards related to debris-flows requires a better understanding of sediment dynamic. Among the hydr

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8

Nasser, Antoine-Alexis. "Advancing the representation of flows along topography in z-coordinate ocean models." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS446.

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Les fonds marins exercent un contrôle majeur sur la circulation océanique. La représentation discrète de la topographie dans les modèles de circulation générale océanique (OGCM) géopotentiels crée des marches artificielles qui produisent des effets néfastes pour la simulation des courants. Cette thèse vise à établir des solutions adaptées pour résoudre les effets adverses des marches dans les OGCM. A partir de configurations idéalisées et en explorant le potentiel de la méthode de Pénalisation des Volumes de Brinkman (BVP), nous étudions la sensibilité des courants simulé aux frontières en mar

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9

Raja, Keshav Jayakrishnan. "Internal waves and mean flow in the presence of topography." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAU006/document.

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Les ondes internes jouent un rôle important dans de nombreux processus dans les océans.L’interaction entre les vagues internes et la topographie océanique a longtemps été un champ de recherche actif. Pourtant, il reste beaucoup de questions sur le sujet. Dans cette thèse, deux processus principaux sont examinés, à savoir la réflexion de faisceaux d’ondes internes sur une pente, et la génération d’ondes sous le vent sur un obstacle tridimensionnel, en utilisant des expériences de laboratoire et des simulations numériques.La réflexion non linéaire d’un faisceau d’onde interne sur une pente unifo

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10

Skopovi, Ivan 1976. "The role of background flow variations in stratified flows over topography." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35632.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.<br>Includes bibliographical references (leaves 89-91).<br>As the atmosphere and oceans feature density variations with depth, the flow of a density-stratified fluid over topography is central to various geophysical and meteorological applications and has been studied extensively. For reasons of convenience and mathematical tractability, the majority of theoretical treatments of stratified flow over a finite-amplitude obstacle assume idealized background flow conditions, namely constant free-stream ve

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11

Monville, Rémy. "Couplages et ondes topographiques dans les noyaux planétaires." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. https://theses.hal.science/tel-04661653.

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En complément des observations magnétiques, la dynamique des noyaux liquides des planètes peut être explorée en mesurant leur rotation. Par exemple, à certaines échelles de temps, le couplage entre le noyau liquide et le manteau terrestre peut être estimé par ces mesures. La dissipation d'énergie associée aux nutations est contrainte par les mesures de rotation de la Terre, tandis que le couple sur l'axe de rotation est fourni par la mesure de la durée du jour. Dans les deux cas, les données ne concordent pas bien avec nos modèles actuels de couplages noyau-manteau. Pour interpréter ces observ

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12

Kiss, Andrew Elek, and Andrew Kiss@anu edu au. "Dynamics of laboratory models of the wind-driven ocean circulation." The Australian National University. Research School of Earth Sciences, 2001. http://thesis.anu.edu.au./public/adt-ANU20011018.115707.

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This thesis presents a numerical exploration of the dynamics governing rotating flow driven by a surface stress in the " sliced cylinder " model of Pedlosky & Greenspan (1967) and Beardsley (1969), and its close relative, the " sliced cone " model introduced by Griffiths & Veronis (1997). The sliced cylinder model simulates the barotropic wind-driven circulation in a circular basin with vertical sidewalls, using a depth gradient to mimic the effects of a gradient in Coriolis parameter. In the sliced cone the vertical sidewalls are replaced by an azimuthally uniform slope around the

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13

Thompson, LuAnne. "Flow over finite isolated topography." Thesis, Woods Hole, Mass. : Woods Hole Oceanographic Institution, 1990. http://catalog.hathitrust.org/api/volumes/oclc/23822687.html.

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14

Mengesha, Yoseph Gebrekidan. "Atmospheric boundary-layer flow over topography data analysis and representations of topography /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ39212.pdf.

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15

Hughes, Christopher William. "The effect of topography on ocean flow." Thesis, University of Oxford, 1992. http://ora.ox.ac.uk/objects/uuid:37b3f6b2-ce5f-45b3-b2ed-3325518b06bb.

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The rôle which topography plays in constraining ocean flow is investigated in several ways, mostly aimed at application to the Southern Ocean where topography is known to be important. The physics of topographic Rossby waves is discussed in some depth and a description of ocean flow in terms of a sum of topographic normal modes is developed. It is shown that the apparent incompleteness of topographic modes can often be circumvented by including a function which absorbs the nett input of potential vorticity. Some subtle problems with this description are dealt with, and a calculation of topogra

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16

Baldwin, Duncan Johnathan. "Boundary layer flow over three dimensional topography." Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307078.

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17

Tudball, Morgan J. "Electrified thin-film flow over inclined topography." Thesis, Loughborough University, 2018. https://dspace.lboro.ac.uk/2134/36253.

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We consider both a long-wave model and a first-order weighted-residual integral boundary layer (WIBL) model in the investigation of thin film flow down a topographical incline whilst under the effects of a normal electric field. The liquid is assumed to be a perfect dielectric, although is trivially extended to the case of a perfect conductor. The perfect dielectric case with no topography includes a simple modified electric Weber number which incorporates the relative electrical permittivity constant into itself. Linear stability analysis is carried out for both models, and critical Reynolds

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18

Holmes, Damian J. "Gravity waves in uniform windflow over topography." Thesis, University of Surrey, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336449.

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19

Gaberšek, Saša. "The dynamics of gap flow over idealized topography /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/10098.

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20

Veremieiev, Sergii. "Gravity-driven continuous thin film flow over topography." Thesis, University of Leeds, 2011. http://etheses.whiterose.ac.uk/1688/.

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This thesis is directed primarily at a systematic theoretical investigation of gravity-driven thin film flow over various topographical features, the effect of inertia being of particular interest. The problem is solved using a hierarchy of models based, in order of decreasing complexity, on (i) the full Navier-Stokes system of equations; (ii) a depth averaged form of the latter; (iii) the lubrication equations. Every effort has been made to solve the underlying discrete equation set in each case efficiently using state-of-the-art solution strategies, thus guaranteeing accurate and mesh-indepe

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21

Risch, Stephan Hermann. "Large-scale wave interactions in baroclinic flow with topography." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312449.

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22

Draghicescu, Anca. "The influence of bed topography on ice sheet flow." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365045.

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23

McVicar, Alistair J. "Numerical simulations of flow-topography interaction using unstructured grids." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/10014.

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Eddies and jets are important components of global ocean momentum and heat budgets but are typically unresolved in low resolution global climate models. Herein, they are evaluated with an idealised model set–up that incorporates barotropic flow, past a cylinder on a β –plane. The flow dynamics are a function of two non–dimensional numbers: the Reynolds number and the [Symbol appears here. To view, please open pdf attachment] –parameter. The model used, Fluidity–ICOM, utilises unstructured meshes and a new stable mixed discontinuous/continuous finite element pair (P1DGP2). Unstructured meshes d

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24

Brown, Harmony Rose. "Numerical simulations of stratified fluid flow over topography near resonance." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p1450159.

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Thesis (M.S.)--University of California, San Diego, 2008.<br>Title from first page of PDF file (viewed Mar. 25, 2008). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 83-85).

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25

Oikonomou, Emmanouil Konstantiou. "Stationary phase internal waves generated by flow along sloping topography." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242690.

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26

Davis, Kevin S. (Kevin Scott) 1975. "Flow of nonuniformly stratified fluid of large depth over topography." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9409.

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27

Abdalla, Ayad A. "Bilayer channel and free-surface thin film flow over topography." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/8819/.

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The work presented in this thesis focuses on gravity driven bilayer flow over a functional surface containing topography, with both liquids taken to be perfectly immiscible. Two such problems are considered and investigated systematically: (i) when the flow is confined between two rigid surfaces ("channel flow"); (ii) for the case of free-surface film flow down an inclined plane ("free-surface flow"). Both problems are underpinned by rigorous and comprehensive mathematical derivations, and the governing equation sets, resulting from application of the long-wave approximation, solved numericall

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28

Sinha, Bablu. "The influence of mesoscale eddies and topography on southern ocean flow." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239650.

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29

Vo, Johnathan Hiep. "Modeling flow encountering abrupt topography using hybridizable discontinuous Galerkin projection methods." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113970.

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Thesis: S.M., Massachusetts Institute of Technology, Computation for Design and Optimization Program, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 85-89).<br>In this work novel high-order hybridizable discontinuous Galerkin (HDG) projection methods are further developed for ocean dynamics and geophysical fluid predictions. We investigate the effects of the HDG stabilization parameter for both the momentum equation as well as tracer diffusion. We also make a correction to our singularity treatment algorithm for nailing down a numerically consisten

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30

Epifanio, Craig Charles. "High-drag states and lee vortices in stratified flow over topography /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/10072.

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31

Lu, Zhiming. "Numerical simulation of internal waves in stratified fluid flow over topography." Thesis, Loughborough University, 2004. https://dspace.lboro.ac.uk/2134/35028.

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The main purpose of this thesis is to investigate internal solitary wave generation and evolution in density-stratified fluid flows over both two-dimensional and three-dimensional bottom topographies using mainly numerical methods supported by some theoretical results. The numerical scheme to solve the forced KdV, KPII and KPI equation is a combination of the Runge–Kutta and Crank–Nicholson methods; a pseudo-spectral method is used to solve the two-dimensional fully nonlinear Euler equations in the streamfunction-vorticity form. The numerical results for a stratified flow over a two-dimensiona

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32

Carlin, Mattia. "The response of river bar topography to the hydrological flow regime." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/312573.

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Alternate bars are large-scale bedforms characterised by an ordered sequence of scour zones and depositional diagonal fronts alternating along channel banks, which are typical of straight channelized rivers. Due to their high relief and migration properties, they represent a problem in river management, because they affect navigation, increase the flooding risk and interact with instream structures. For this reason, in the last decades many studies took the challenge of defining suitable criteria able to describe their morphometric properties. Theoretical, experimental and numerical works hav

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33

Carlin, Mattia. "The response of river bar topography to the hydrological flow regime." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/312573.

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Alternate bars are large-scale bedforms characterised by an ordered sequence of scour zones and depositional diagonal fronts alternating along channel banks, which are typical of straight channelized rivers. Due to their high relief and migration properties, they represent a problem in river management, because they affect navigation, increase the flooding risk and interact with instream structures. For this reason, in the last decades many studies took the challenge of defining suitable criteria able to describe their morphometric properties. Theoretical, experimental and numerical works h

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34

Du, Jun. "Estimation de l'épaisseur des coulées de lave sur la Lune et le Mercure basée sur la modélisation de la dégradation topographique de cratères d’impact." Thesis, Université Côte d'Azur (ComUE), 2019. http://www.theses.fr/2019AZUR4099.

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Dans cette étude, les cratères partiellement enterrés dans la maria lunaire et dans les plaines lisses septentrionales de Mercure ont été identifiés à l'aide de données récemment acquises concernant l'optique, l'élévation et la composition, et les épaisseurs de coulées de lave proches des cratères partiellement enterrés ont été estimées par modélisation numérique de leur dégradation topographique. Au chapitre 1, je présente d'abord le contexte géologique des plaines volcaniques de la Lune et de Mercure. Ensuite, je vais résumer toutes les méthodes qui ont été utilisées pour estimer l’épaisseur

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35

Gessese, Alelign Fekade. "Algorithms for Bed Topography Reconstruction in Geophysical Flows." Thesis, University of Canterbury. Mechanical Engineering, 2013. http://hdl.handle.net/10092/8673.

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Bed topography identification in open channel and glacier flows is of paramount importance for the study of the respective flows. In the former, the knowledge of the channel bed topography is required for modelling the hydrodynamics of open channel flows, fluvial hydraulics, flood propagation, and river flow monitoring. Indeed, flow models based on the Shallow Water Approximation require prior information on the channel bed topography to accurately capture the flow features. While in the latter, usable bedrock topographic information is very important for glacier flow modellers to accurately p

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36

Bevan, Edward. "Chaotic advection in shallow flows over bed topography." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437158.

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37

Söderberg, Stefan. "Trapped supercritical flows: Numerical simulations with idealized topography." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-392620.

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Numerical simulations of supercritical coastal flows have been performed. The meso-γ-scale model which has been used in this study is non-linear, hydrostatic and has a higher-order turbulence closure. Previous studies of supercritical coastal flows with this model have given rise to some questions and hypotheses, e. g. is the gradual curvature of the main coastal mountains north of Cape Mendocino sufficient to excite an expansion fan? Is the local terrain of Cape Mendocino responsible for the collapse of the marine atmospheric layer (MABL) in Shelter Cove? This study was designed to answer the

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38

Hakes, Kyle Jeffrey. "Tidally Generated Internal Waves from Asymmetric Topographies." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8717.

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Internal waves are generated in stratified fluids, like the ocean, where density increases with depth. Tides are one of the major generation mechanisms of internal waves. As the tides move water back and forth over underwater topography, internal waves can be generated. The shape of the topography plays a major part in the properties of the generated internal wave and the type of wave and energy is known for multiple symmetric topographies, such as Gaussian or sinusoidal. In order to further understand the effects topographic shape plays, the effect of asymmetry on internal waves is investigat

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Petroliagis, Thomas I. "Studies of barotropic flow over topography using a Galerkin Finite Element model." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/23411.

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A finite element shallow-water model is tested with two types of surface topography. The model uses rectangular subdivisions in a vorticity-divergence formulation, and a semi-implicit time discretization. In the first experiment an east-west ridge or valley is placed in a channel with east-west periodic conditions. Linear quasi-geostrophic solutions are derived with the rigid lid assumption. The Rossby waves are successfully simulated in the model with linear solutions as the initial conditions. The model phase speeds are very close to the analytic values when the latter are properly corrected

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ISNARD, ANDRE AUGUSTO. "COMPUTATIONAL INVESTIGATION ON THE FLOW AND ATMOSPHERIC POLLUTANT DISPERSION OVER COMPLEX TOPOGRAPHY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5174@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>O objetivo principal do presente trabalho foi investigar computacionalmente o escoamento e a dispersão de poluentes atmosféricos sobre topografias complexas tridimensionais em escala de laboratório. Foram realizadas simulações numéricas de escoamentos neutros e estavelmente estratificados sobre colinas e também sobre terreno plano. A modelagem matemática, baseada na solução das equações gerais de conservação, inclui o modelo de tensões de Reynolds para a turbulência e um modelo de duas camadas para o tratamento do escoamento na reg

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Lim, Kahn Yung 1976. "Trapped disturbances and effects of tropopause height in stratified flow over topography." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/89314.

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42

Zhang, Xiaoyang. "Soil-erosion modelling at the global scale using remote sensing and GIS." Thesis, King's College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321948.

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Penserini, Brian. "Debris Flow Network Morphology and a New Erosion Rate Proxy for Steepland Basins with Application to the Oregon Coast Range and Cascadia Subduction Zone." Thesis, University of Oregon, 2015. http://hdl.handle.net/1794/19276.

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Reaches dominated by debris flow scour and incision tend to greatly influence landscape form in steepland basins. Debris flow networks, despite their ubiquity, have not been exploited to develop erosion rate proxies. To bridge this gap, I applied a proposed empirical function that describes the variation of valley slope with drainage area in fluvial and debris flow reaches of steepland channel networks in the Oregon Coast Range. I calibrated a relationship between profile concavity and erosion rate to map spatial patterns of long-term uplift rates assuming steady state. I also estimated the ma

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44

Rump, Owen James. "Non-rotating and rotating free surface flows over topography." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1446071/.

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An important effect in atmosphere and ocean dynamics is the drag exerted by topography, in the form of mountain ranges and individual mountains, on incident flows. Because the scale of topographic variations are usually small compared to the resolution of global-scale numerical models, drag effects must often be parameterised. This thesis aims to understand topographic drag in highly idealised numerical models with a view to demonstrating where efforts in parameterisation may be best directed. Specifically, the thesis considers single-layer and one and one half layered flow (where a single lay

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Lindeman, John David. "A numerical study of topographical effects on flow regimes in the lower atmosphere." Fairfax, VA : George Mason University, 2008. http://hdl.handle.net/1920/3063.

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Thesis (Ph.D.)--George Mason University, 2008.<br>Vita: p. 138. Thesis director: Zafer Boybeyi. Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Computational Sciences and Informatics. Title from PDF t.p. (viewed July 3, 2008). Includes bibliographical references (p. 132-137). Also issued in print.

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46

Eberly, Lauren Elizabeth. "Internal Wave Generation Over Rough, Sloped Topography: An Experimental Study." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3437.

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Internal waves exist everywhere in stratified fluids - fluids whose density changes with depth. The two largest bodies of stratified fluid are the atmosphere and ocean. Internal waves are generated from a variety of mechanisms. One common mechanism is wind forcing over repeated sinusoidal topography, like a series of hills. When modeling these waves, linear theory has been employed due to its ease and low computational cost. However, recent research has shown that non-linear effects, such as boundary layer separation, may have a dramatic impact on wave generation. This research has consisted o

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Woodhead, David John. "Computation of air flow over steep and complex topography using terrain-intersecting meshes." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496211.

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48

Cowling, Neil Peter. "Thin film flow over a topography and non-isothermal droplets : a numerical study." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551241.

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Research towards understanding continuous thin film flows and droplet spreading is as relevant today as it ever was. Theoretically, lubrication theory has played a pivotal role with the equations involved requiring numerical solution. The most commonly employed solvers are based upon either a time-splitting or multigrid strategy; no consensus has been reached as to which is the most accurate and efficient. With modern engineering applications demanding solutions at smaller and smaller scales, in turn requiring the use of finer grids to ensure mesh independent solutions, efficiency is a necessa

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Sridhar, Harshitha. "The Impact of Boundary Condition on Groundwater Flow : Topography v/s Recharge Controlled." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-286148.

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Abstract:

Groundwater interactions at a regional scale are of great importance to characterize subsurface flow processes. Extensive researches have been conducted previously to determine the main factors controlling the regional implications on groundwater flux circulation. Groundwater circulation occurs due to variation in the groundwater table (hydraulic gradient) across the spatial scale. Previous research highlighted the correlation between groundwater table with both topography variation and the recharge from precipitation. This study aims to highlight the impact of these boundary conditions. Five

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Zugliani, Daniel. "Two-phase modelling of debris flow over composite topography: theoretical and numerical aspects." Doctoral thesis, Università degli studi di Trento, 2015. https://hdl.handle.net/11572/367641.

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Abstract:

In the mountain territory the majority of the population and of the productive activities are concentrated in the proximity of torrents or over alluvial fans. Here, when intense rainfall occurs, debris flow or hyper-concentrated flow events can produce serious problems to the population with possible casualties. On the other hand, the majority of these problems could be overcome with accurate hazard mapping, disaster prevention planning and mitigation structures (e.g. silt check dams, paved channels, weirs ...). Good and reliable mathematical and numerical models, able to accurately describe t

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