Relevant bibliographies by topics / Lagrangian dispersal models / Dissertations / Theses
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Dissertations / Theses on the topic 'Lagrangian dispersal models'

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Published: 4 May 2024

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1

Ross, Rebecca E. "Investigating the role of larval dispersal models in the development of an 'ecologically coherent' network of deep sea marine protected areas." Thesis, University of Plymouth, 2016. http://hdl.handle.net/10026.1/6560.

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There is currently worldwide pressure to establish Marine Protected Area (MPA) networks which are self-sustaining and will persistently protect habitats and species. In order for MPA networks to be effective, the species targeted for conservation must be able to disperse between protected areas and maintain a gene-flow necessary for population sustainability and persistence. This warrants new research on how to quantify and map faunal dispersal to ensure that protection will be effective and sustainable. Population genetic methods have merit, with the ability to track parentage and gene flow b
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2

Guillaumot, Charlène. "Modelling the response of Antarctic marine species to environmental changes. Methods, applications and limitations." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2021. http://www.theses.fr/2021UBFCK020.

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Parmi les outils qui permettent de mieux comprendre les systèmes naturels, la modélisation écologique a connu un essor particulièrement important depuis une vingtaine d’années. Les modèles écologiques, représentation simplifiée d’une réalité complexe, permettent de mettre en avant les facteurs environnementaux qui déterminent la niche écologique des espèces et de mieux comprendre leur réponse aux changements de l’environnement. Dans le cas des faunes marines antarctiques, la modélisation écologique fait face à plusieurs défis méthodologiques. Les jeux de données de présence des espèces sont tr
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3

Lönnell, Niklas. "Dispersal of bryophytes across landscapes." Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-100064.

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Dispersal, especially long-distance dispersal, is an important component in many disciplines within biology. Many species are passively dispersed by wind, not least spore-dispersed organisms. In this thesis I investigated the dispersal capacity of bryophytes by studying the colonization patterns from local scales (100 m) to landscape scales (20 km). The dispersal distances were measured from a known source (up to 600 m away) or inferred from a connectivity measure (1–20 km). I introduced acidic clay to measure the colonization rates over one season of a pioneer moss, Discelium nudum (I–III). I
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4

Goncalves, Juliana Bittencourt. "EMPREGO DE UM MODELO DE DISPERSÃO TURBULENTO NO ESTUDO DA UNIVERSALIDADE DA TAXA DE DISSIPAÇÃO DA ENERGIA." Universidade Federal de Santa Maria, 2010. http://repositorio.ufsm.br/handle/1/10254.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>This study employed different autocorrelation functions and Maclaurin series expansions in the derivation of expressions describing the dissipation rate of turbulent kinetic energy. These expressions have the same functional form, but are described in terms of different numerical coefficients. The values obtained for the numerical coefficients were used in a Lagrangian stochastic dispersion model to simulate the dispersion of contaminants in the Planetary Boundary Layer (PBL). The simulation results were compared with concentrati
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5

Riffel, Morgana Silva Franco. "Simulação da dispersão de poluentes por modelo lagrangeano em condições de vento fraco." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/12011.

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Neste trabalho, a partir de dados rotineiramente medidos em estações meteorológicas de superfície, estimamos os parâmetros de escala da Camada Limite Planetária (CLP) do experimento OLAD (Over Land Atmospheric Dispersion). Esses parâmetros são muito importantes no processo de dispersão, especialmente no cálculo das parametrizações para os modelos de dispersão atmosférica. Simular o processo de dispersão de poluentes na atmosfera sob a condição de vento fraco é uma tarefa difícil. Nesse sentido, realizamos a implementação e avaliação de um modelo de partícula lagrangeano semi-analítico, denomin
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6

Zacharias, Daniel Constantino. "Desenvolvimento do STFM (Spill, Transport and Fate Model): Modelo computacional lagrangeano de transporte e degradação de manchas de óleo." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/14/14133/tde-08052018-192547/.

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Os derramamentos de petróleo são consequência inevitável e indesejável da produção e transporte do petróleo e seus derivados. A maioria desses derramamentos são relativamente pequenos, mas alguns deles são grandes o suficiente para causar significativo impacto ambiental. Nessas situações, os modelos computacionais são ferramentas importantes para estimar a trajetória, dimensionamento e comportamento do óleo derramado no ambiente marinho, sendo determinantes na elaboração de planos de ação e trabalho das equipes de resposta. O transporte e destino de óleo offshore derramado são regidos majorita
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7

Sallet, Marieli, and Marieli Sallet. "Desenvolvimento de um modelo lagrangeano para dispersão de poluentes em condições de vento fraco." Universidade Federal de Pelotas, 2007. http://repositorio.ufpel.edu.br/handle/ri/2183.

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Made available in DSpace on 2014-08-20T14:25:46Z (GMT). No. of bitstreams: 1 dissertacao_marieli_sallet.pdf: 231023 bytes, checksum: f445526b62fbfcde40fb1bc5ca90923a (MD5) Previous issue date: 2007-02-23<br>Currently, the search for analytical solutions for the dispersion problems is one of the main research subjects in the pollutant dispersion modeling. These solutions become important due to the intention to obtain dispersion models that generate reliable results in a small computational time, which are of great interest for regulatory air quality applications. Lagrangian particle mo
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8

Stefanello, Michel Baptistella. "Desenvolvimento de um modelo lagrangiano para estimar a dispersão de escalares passivos em condições de meandro do vento horizontal." Universidade Federal de Santa Maria, 2017. http://repositorio.ufsm.br/handle/1/12408.

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The description of the effects of the wind meandering in the scalar dispersion is a challenging task, since this type of flow represents a physical state characterized by multiple scales. In this study, a Lagrangian stochastic diffusion model is derived to describe the scalar transport during the horizontal wind meandering phenomenon, occurring in a PBL. The model is derived from the linearization of the Langevin equation and employs a heuristic functional form, which represents the autocorrelation functions of the meandering. The new solutions, which describe the longitudinal and latera
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9

Arbage, Maria Cristina Andres. "Características estatísticas turbulentas associadas ao fenômeno do vento norte no sul do Brasil: aplicação ao problema da difusão de contaminantes." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/3892.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A parameterization for the transport processes in a shear driven planetary boundary layer (PBL) has been established, employing turbulent statistical quantities measured during the north wind phenomenon in southern Brazil. Therefore, observed one-dimensional turbulent energy spectra are compared with a spectral model based on the Kolmogorov arguments. The good agreement obtained from this comparison leads to well defined formulations for the turbulent velocity variances, local decorrelation time scale and eddy diffusivities. Furthe
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10

SANTIAGO, D. I. ""Aplicação de um modelo lagrangiano de trajetória de partículas para modelagem da dispersão em águas rasas e simulação da dispersão no canal de acesso ao porto de Vitória, ES"." Universidade Federal do Espírito Santo, 2007. http://repositorio.ufes.br/handle/10/3873.

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Made available in DSpace on 2016-08-29T15:09:31Z (GMT). No. of bitstreams: 1 tese_2632_Dissertação_Santiago2007.pdf: 18381268 bytes, checksum: ea3070f9b201f73cb61b16da20bc45a9 (MD5) Previous issue date: 2007-02-26<br>Nesta pesquisa um Modelo Lagrangiano de Partículas de Deslocamento Aleatório (MLPDA) desenvolvido para a modelagem da dispersão em águas rasas é acoplado ao modelo hidrodinâmico DIVAST (Depth Integrated Velocity and Solute Transport) para estudar as características dispersivas na região do canal de acesso ao Porto de Vitória. Inicialmente o modelo DIVAST é utilizado na avaliação
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11

Mestres, Ridge Marc. "Three-dimensional simulation of pollutant dispersion in coastal waters." Doctoral thesis, Universitat Politècnica de Catalunya, 2002. http://hdl.handle.net/10803/6382.

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Traditionally, the sea has been considered as the ultimate sink of most pollutions, due to its huge volume and assimilating capacities, and the coastal waters, because of their intermediate position between deep seas and human activities, has been acting as a buffer zone. However, during the past years, the interest in environmental issues in general, and in the conservation of the water quality in coastal regions, in particular, has steadily increased. For coastal waters, this growing interest can be related to the increase in population and industrial activity along rivers and on coastal are
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12

Degrazia, Franco Caldas. "Derivação de escalas de tempo lagrangeanas dependentes da distância da fonte : uma aplicação na dispersão de contaminantes na camada limite planetária neutra e estável." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/148024.

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Existe uma variedade de modelos de dispersão de poluentes, em geral, os modelos gaussianos são usados em todo o mundo por agências ambientais com intuito de regulação. O modelo CALPUFF é um deles. Neste estudo, _e avaliada a influência de escalas de tempo de descorrelação no sistema de modelagem CALPUFF, sob condições atmosféricas neutras. Para fazer isso uma nova parametrização das escalas de tempo descorrelação é proposta. Uma distribuição espectral de um perfil de velocidade euleriana e uma for- mutação da evolução das escalas temporais de descorrelação Lagrangiana são utilizadas como os me
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13

Chen, Cheng-Wei, and 陳政崴. "Predicting seed dispersal using a Lagrangian Stochastic Model." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/z3kvm5.

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碩士<br>國立臺灣大學<br>生物環境系統工程學研究所<br>106<br>The migration and expansion of plant species are determined by the Long-Distance Dispersion (LDD). The more sophisticated mechanistic dispersal model is needed especially for the LDD of the wind-driven seeds. This study simulated the seed dispersion trajectories in the canopy turbulence by using the Lagrangian Stochastic Dispersion Model under different atmospheric stabilities in conjunction with the effect of the intermittency of the turbulent kinetic energy dissipation rate. Also, the effects of friction velocity, seed release height and seed terminal v
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14

Henriques, Mariana Ré Carvalho. "Aplicação de modelação oceânica ao estudo de dispersão de plásticos na zona da Margem Ibérica Ocidental." Master's thesis, 2020. http://hdl.handle.net/10451/48123.

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Tese de mestrado em Ciências Geofísicas (Meteorologia e Oceanografia), Universidade de Lisboa, Faculdade de Ciências, 2020<br>A poluição associada a plásticos marinhos é considerada um dos problemas ambientais mais graves à escala global, sendo hoje um tema de maior relevância na agenda internacional. A caracterização dos plásticos tem sido objeto de diversos estudos, mas a componente de monitorização dos padrões de dispersão é praticamente inexistente na região da Península Ibérica. O objetivo deste estudo foi conjugar técnicas de modelação para um primeiro estudo da concentração/dispersão de
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15

Mullan, Sean. "Tidal sedimentology and geomorphology in the central Salish Sea straits, British Columbia and Washington State." Thesis, 2017. https://dspace.library.uvic.ca//handle/1828/8943.

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Intra-archipelago waterways, including tidal strait networks, present a complex set of barriers to, and conduits for sediment transport between marine basins. Tidal straits may also be the least well understood tide-dominated sedimentary environment. To address these issues, currents, sediment transport pathways, and seabed sedimentology & geomorphology were studied in the central Salish Sea (Gulf and San Juan Islands region) of British Columbia, Canada and Washington State, USA. A variety of data types were integrated: 3D & 2D tidal models, multibeam bathymetry & backscatter, seabed video, gr
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