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Tesis sobre el tema "Processus estuaire"

Autor: Grafiati

Publicado: 25 de mayo de 2024

Última modificación: 31 de julio de 2025

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1

Ndom, Birane. "Salinisation de l'estuaire de la Casamance : modélisation des processus physiques." Electronic Thesis or Diss., Sorbonne université, 2025. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2025SORUS064.pdf.

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L'estuaire du fleuve Casamance, au sud du Sénégal, est une zone d'intense activité économique mais son fonctionnement hydrodynamique demeure peu documenté. Depuis une période de recherche active dans les années 80, les études sont rares, entraînant un manque de données pour établir une base de référence de l'estuaire et suivre son évolution. Cet estuaire connaît d'importantes fluctuations de salinité : durant la saison sèche (novembre-juin), il s'inverse et sa salinité croit vers l'amont, atteignant 50 psu en saison sèche puis 20 psu en saison humide (juillet-septembre). L'objectif de cette th

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2

Le, Normant Catherine. "Modélisation numérique tridimensionnelle des processus de transport des sédiments cohésifs en environnement estuarien." Toulouse, INPT, 1995. http://www.theses.fr/1995INPT014H.

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Cette these porte sur la modelisation numerique tridimensionnelle du transport en suspension des sediments cohesifs en estuaire. Dans un premier temps, le modele numerique telemac-3d, qui simule les ecoulements tridimensionnels en riviere et en mer, a fait l'objet de nouveaux developpements afin de representer les processus propres aux sediments fins (phenomene de floculation, mouvements de la creme de vase, consolidation du fond vaseux). L'etude d'un estuaire schematique a montre les capacites du code a simuler les phenomenes caracteristiques des environnements estuariens: propagation de la m

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3

Boukortt, Nour El Imene. "Biogéochimie d’un estuaire soumis aux hypoxies : processus de recyclage benthique des nutriments et des métaux associés dans la Loire." Electronic Thesis or Diss., Angers, 2024. http://www.theses.fr/2024ANGE0034.

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L'hypoxie est un problème qui s'est largement répandu au cours du 20ème siècle. Un apport excessif en nutriments favorise la production de matière organique qui, lors de sa dégradation, provoque une baisse d'oxygénation pouvant atteindre des niveaux critiques pour les organismes vivants. Dans les estuaires macrotidaux comme la Loire, la demande en oxygène est accrue dans la zone de turbidité maximale (ZTM), une caractéristique clé de ces derniers. La ZTM agit comme un réacteur hétérotrophe générant une demande locale en OD. De plus, la Loire a subi une longue histoire d’enrichissement en nutri

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4

Voltz, Baptiste. "Dynamique de la matière organique au sein dans les estuaires picards : caractérisation des faciès biosédimentaires et quantification des processus de minéralisation benthique." Thesis, Littoral, 2020. http://www.theses.fr/2020DUNK0579.

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Les estuaires assurent une production élevée et le transfert d'une grande quantité de matière organique (MO) du continent vers l'océan. Une étape importante pour comprendre les échanges de MO à l'interface continent - océan, le long de la côte française de la Manche Orientale, est d'établir un bilan de MO dans les trois plus grands estuaires : la Canche, l'Authie et de la Somme. Dans ce but, il a été réalisé une description sédimentologique et biologique du sédiment de surface et une caractérisation élémentaire et isotopique distinguant l'origine de la MO sédimentaire. La caractérisation du sé

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5

Lesourd, Sandric. "Processus d'envasement d'un estuaire macrotidal : zoom temporel du siecle a l'heure ; application a l'estuaire de la seine." Caen, 2000. http://www.theses.fr/2000CAEN2049.

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La problematique de cette these engagee dans le cadre du programme seine-aval, est de comprendre et de caracteriser les mecanismes d'envasement de l'estuaire macrotidal de la seine. La cartographie de la couverture sedimentaire de rouen jusqu'a la baie de seine est presentee. Dans l'embouchure, les facies sedimentaires etaient grossiers au xixeme siecle et envases actuellement. Une interpretation de l'evolution a l'echelle du siecle est proposee. Une etude faciologique des depots est realisee. Les modalites de la sedimentation sont etudiees sur une courte echelle de temps. La variation de la n

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6

Orseau, Sylvain. "Dynamique sédimentaire d'un estuaire tropical sous influence amazonienne : Le cas de l'estuaire du Mahury." Thesis, Littoral, 2016. http://www.theses.fr/2016DUNK0450.

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La migration des bancs de vase observée le long des côtes Guyanaises génère des problématiques de navigation, particulièrement pour l'unique port de commerce de Guyane localisé dans l'estuaire du Mahury. La dynamique hydrosédimentaire de cet estuaire mésotidal et l'influence des bancs sur cette dernière sont très peu renseignées. Les principaux résultats de cette étude mettent en évidence l'importance relative du débit et des courants de marée sur la dynamique des sédiments fins. Bien que l'asymétrie de la marée soit dominée par le flot, les courants de jusant sont prédominants en saison humid

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7

Cordier, Mateo. "Ecosystème estuarien et système économique régional: faisabilité d'une intégration par modélisation input-output : application au cas de l'habitat halieutique dans l'estuaire de la Seine." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209905.

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Le modèle input-output régional environnementalisé développé dans la thèse de M. Cordier suggère qu’il serait possible de restaurer 25% des surfaces naturelles de nourriceries de poissons détruites dans l’estuaire de la Seine entre 1834 et 2004. Le modèle suggère que la mesure de restauration pourrait augmenter de 15% à 23% la biomasse de soles produite dans l’estuaire par rapport à une situation sans mesure. Quant à l’effet des coûts de restauration sur les agrégats macroéconomiques (PIB, emploi, etc.), il génère une diminution qui ne dépasse pas 0,5% par rapport à une situation sans mesure.

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8

Verney, Romaric. "Processus de contrôle de la dynamique des sédiments cohésifs : Mesures in situ, mesures expérimentales et modélisation : Application à l'estuaire de Seine." Rouen, 2006. http://www.theses.fr/2006ROUES032.

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Les forçages hydrodynamiques influençant les vasières intertidales de l'estuaire de Seine ont été calculés dans le système Seine. Ces forçages induisent des érosions de plusieurs millimètres à plusieurs centimètres. La connaissance des processus d'érosion/dépôt a permis la réalisation d'un modèle semi-empirique 1DV de l'évolution des vasières intertidales. Les processus de floculation et de défloculation des matières en suspension (MES) naturelles de l'estuaire de Seine ont été étudiés en laboratoire. Les tests cinétiques effectués à partir du suivi annuel des MES ont permis d'évaluer les para

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9

Normandeau, Alexandre. "Processus gravitaires tardi-quaternaires dans les canyons et chenaux sous-marins du Saint-Laurent (Est du Canada)." Doctoral thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/25907.

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Tableau d'honneur de la Faculté des études supérieures et postdorales, 2014-2015<br>Les canyons et chenaux sous-marins sont formés par des courants de densité subaquatiques et sont les principaux conduits par lesquels les sédiments continentaux atteignent les milieux marins profonds. Plusieurs canyons et chenaux sous-marins incisent les marges de l’estuaire et du golfe du Saint-Laurent jusqu’à une profondeur de ≥ 300 m. Des données hydroacoustiques et sédimentologiques récemment acquises ont permis d’analyser en détail la morphologie et les processus sédimentaires tardi-quaternaires qui ont mo

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10

Yang, Chengfan. "Li isotope study of Yangtze River sediments : new constraints on climate, weathering and carbon cycle relationships." Electronic Thesis or Diss., Sorbonne université, 2020. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2020SORUS433.pdf.

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Au cours de ce travail, j’ai réalisé une série d'études dans le bassin du Changjiang (Yangtze), afin de mieux comprendre l'influence de ces effets.Tout d'abord, l'exploitation du barrage des Trois Gorges (TGD) a modifié la composition géochimique des sédiments en aval. Depuis 2003, les sédiments venant des hauts bassins ont été en grande partie retenus en amont, tandis que les sédiments précédemment déposés dans le bassin moyen-inférieur ont été progressivement remis en suspension. Ces processus expliquent l’évolution géochimique des sédiments exportés vers la mer de Chine. En deuxième partie,

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11

Trentesaux, Alain. "Enregistrement de processus sédimentaires pléistocènesExemples de plates-formes détritiques et de bassins profondsMer du Nord et mers de Chine." Habilitation à diriger des recherches, Université des Sciences et Technologie de Lille - Lille I, 2005. http://tel.archives-ouvertes.fr/tel-00140889.

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De leur source continentale à leur lieu de stockage ultime, les particules sédimentaires détritiques vont être produites en fonction de la nature et de l'intensité des processus continentaux : climat, contexte géodynamique. Sur les plates-formes, elles vont subir l'action des agents hydrodynamiques, vont se déplacer, constituer des corps sédimentaires qui seront préservés ou non selon la nature et l'intensité des processus : agitation s.l., apports sédimentaires, création d'espace par subsidence et variation du niveau marin... Enfin, dans les domaines océaniques profonds, elles vont se déposer

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12

Webley, James A. C. "The ecology of the mud crab (Scylla serrata): their colonisation of estuaries and role as scavengers in ecosystem processes." Thesis, Griffith University, 2008. http://hdl.handle.net/10072/367091.

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Scylla serrata is a portunid crab which can attain a weight of over 2 kg and a carapace width exceeding 250 mm. It is distributed throughout the Indo-West Pacific extending down the east coast of Africa, and both the east and west coasts of Australia. In Australia it is commonly known as the mud crab because it occurs within muddy, mangrove-lined bays and estuaries. Mud crabs are generalist predators eating most small, slow moving animals which they can catch, but they are also vigorous scavengers. Being scavengers, they are readily caught in baited traps set by commercial and recreational fis

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13

Mahamod, Yusuff. "Sedimentary processes in the Dwyryd Estuary." Thesis, Bangor University, 1989. https://research.bangor.ac.uk/portal/en/theses/sedimentary-processes-in-the-dwyryd-estuary(ca0aea23-480c-4032-ba10-12a9adee740c).html.

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This study aims to describe and quantify the important sedimentary processes which control the dispersal and accumulation of sediment in the Dwyryd Estuary, adjacent to Tremadog Bay in West Wales. It is shown that sedimentation in the estuary is dominantly control by fast tidal currents, and in the bay by weak tidal currents. Landward transport of coastal sediments by tidal currents is the residual sediment transport path. The spatial distribution of textural parameters of the estuarine sediments is related to the strength of tidal currents as well as the morphology and bathymetry of the study

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14

Mendes, Renato Paulo dos Santos. "The Douro estuarine plume: detection, processes and dynamics." Doctoral thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/17073.

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Doutoramento em Física<br>O Douro é um dos maiores rios da Península Ibérica, constituindo a maior descarga de água doce para o Oceano Atlântico na costa noroeste portuguesa. A sua pluma estuarina tem particular relevância na dinâmica costeira e na modulação de fenómenos biogeoquímicos. São objetivos desta dissertação contribuir para a compreensão dos processos físicos associados à geração e propagação da pluma estuarina do Rio Douro no oceano, assim como para o conhecimento dos seus padrões de dispersão e da forma como estes alteram a hidrologia e a circulação costeira, considerando os

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15

Marion, Claire. "Processus de sédimentation fine en domaine estuarien macrotidal : approche trans-disciplinaire et multi-échelles : application à l'estuaire de l'Authie, Nord de la France." Littoral, 2007. http://www.theses.fr/2007DUNK0188.

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Les mécanismes contrôlant la dynamique des sédiments fins en milieu estuarien sont complexes du fait de la multiplicité des processus en action et de leurs interactions diverses et encore souvent mal comprises. L’étude de la dynamique des sédiments fins regroupe quelques uns des enjeux environnementaux fondamentaux. En raison de leur forte affinité avec une large gamme de contaminants métalliques et organiques, les particules fines sont en mesure de concentrer la pollution provenant à la fois du bassin versant et du milieu marin et dont les risques respectifs sont croissants (agriculture, traf

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16

Coffey, Michael. "The behaviour of trace metals in the Humber Estuary, U.K." Thesis, University of East Anglia, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240991.

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17

Dyson, Kirstie Elizabeth. "Biodiversity and ecosystem processes in heterogeneous environments /." St Andrews, 2008. http://hdl.handle.net/10023/698.

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18

Souza, Rogério Riker de. "Modelagem numérica da circulação de correntes de maré na Baía de Marajó e Rio Pará (PA)." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3147/tde-19092006-154712/.

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A região amazônica possui uma vocação natural para a navegação, uma vez que os rios desempenham um papel preponderante, sendo em muitos casos as únicas alternativas de transporte e comunicação. O trabalho se insere nesse cenário, tendo como objetivo maior a sistematização do conhecimento a respeito da circulação de correntes de maré na Baía de Marajó e Rio Pará (PA), com foco na Área Portuária de Vila do Conde. O melhor entendimento sobre as correntes de maré será um elemento importante para o planejamento portuário e hidroviário interior, além de propiciar um incremento na segurança e otimiza

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19

Al-Enezi, Eqbal Hussain. "Modelling of phosphorus adsorption processes in estuarine and coastal water." Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/54203/.

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This study consists of three parts: (i) Field work and data collection from the Loughor and Severn Estuaries. P adsorption increased with decreasing median sediment size in both estuaries. A positive correlation was found between the P adsorption in sediment and salinity in the Loughor Estuary, whereas a negative correlation was found in the Severn Estuary. Some factors, such as particle grain size, salinity, pH, organic matter, suspended sediment concentration and P concentration were found to control the exchangeable or loosely sorbed P (adsorbed P) in both estuaries. (ii) Laboratory experim

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20

Abril, Gwenaël. "Dynamique du carbone dans les estuaires européens : processus de minéralisation et transfert continent-ocean-atmosphère." Bordeaux 1, 1999. http://www.theses.fr/1999BOR10577.

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Les transferts de carbone entre le continent, l'océan et l'atmosphère sont étudiés dans dix estuaires européens. Une grande partie du carbone organique (COrga) transporté par les fleuves est minéralisée dans les estuaires. Cette minéralisation qui affecte principalement la fraction particulaire est conditionnée par l'origine (phytoplancton fluviatile, rejets anthropiques, sols) et la labilité de ce COrga et le temps de résidence des particules. Les processus de minéralisation sont étudiés en détail dans deux estuaires macrotidaux. Dans la Gironde (France), les cycles de dépôt et de remise en s

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21

MacDonald, Daniel George 1970. "Mixing processes and hydraulic control in a highly stratified estuary." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/16902.

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Thesis (Ph. D .)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2003.<br>Includes bibliographical references (p. 207-214).<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>This thesis utilizes field data from the Fraser River Estuary, a highly stratified system located in southwestern British Columbia, Canada, to investigate the nature of mixing processes in a highly stratified environment, and to extend two-dimensional hydraulic theory to a three dimen

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22

Thurston, William. "Turbulence as a mediator of processes in a macrotidal estuary." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515412.

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23

Kenny, Carolyn. "Nitrogen transformation processes and nitrous oxide evolution in estuarine intertidal zones." Thesis, Royal Holloway, University of London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417365.

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24

Smar, Daina. "An assessment of ecological processes in the Apalachicola estuarine system, Florida." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5506.

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The following is a compilation of field data collected in 2011 and 2012 in Apalachicola, FL as part of a five year study assessing the ecological effects of sea level rise in the northern Gulf of Mexico. Many coastal communities, both natural and developed, will soon be working to mitigate the effects of sea level rise, if they are not already doing so. This thesis investigates the natural patterns of the Apalachicola estuarine system through the collection and analysis of in situ water, sediment, and biomass samples. Additionally, results of the field samples are presented and recommendations

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25

Mhashhash, Aisha Fowzi. "Laboratory and numerical modelling studies of sediment flocculation processes in estuaries." Thesis, Cardiff University, 2018. http://orca.cf.ac.uk/114776/.

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Surface water is one of the fundamental parts of the environment and needs to be protected from all pollution sources for human survival. Urban development and human activities have increased the contamination of coastal and estuarine water due to insufficiently treated sewage, runoff from fertilised agricultural area and lawns and releasing industrial pollutant directly into river and estuaries. Cohesive sediment in estuaries can act as either a source or a sink of many pollutants, such as nutrients and heavy metals. Understanding the interactions between sediment and nutrients in water bodie

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26

Boonphakdee, Thanomsak. "Sources of organic matter and its transportation processes in a tropical river-estuary : the Bangpakong estuary, Thailand." Kyoto University, 2007. http://hdl.handle.net/2433/136568.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第13401号<br>農博第1656号<br>新制||農||948(附属図書館)<br>学位論文||H19||N4297(農学部図書室)<br>UT51-2007-Q802<br>京都大学大学院農学研究科応用生物科学専攻<br>(主査)教授藤原建紀, 教授山下洋, 教授縄田栄治<br>学位規則第4条第1項該当

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27

Weaver, Andrew John. "Numerical and analytical modelling of oceanic/atmospheric processes." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27560.

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Two problems in oceanic/atmospheric modelling are examined in this thesis. In the first problem the release of fresh water from a midlatitude estuary to the continental shelf is modelled numerically as a Rossby adjustment problem using a primitive equation model. As the initial salinity front is relaxed, a first baroclinic mode Kelvin wave propagates into the estuary, while along the continental shelf, the disturbance travels in the direction of coastally trapped waves but with a relatively slow propagation speed. When a submarine canyon extends offshore from the estuary, the joint effect of b

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28

Budi, Santoso Eko. "Tidal anomalies at river entrances and the physical processes which generate them /." St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17707.pdf.

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Yannaccone, John A. "Numerical simulation of the effects of sea level rise on estuarine processes." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/50072.

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The increasing concentration of carbon monoxide and other gases in the earth’s atmosphere is expected to cause temperatures on earth to increase. This condition, known as the greenhouse effect, could cause the sea level to rise due to the partial melting of the polar icecaps and the thermal expansion of the oceans. Such a rise in the sea level would affect the tides, currents, and sediment and salinity distributions within estuaries. To see the nature of these effects, a parametric study was performed on the Rappahannock River in Virginia with a two-dimensional, laterally averaged, time-depe

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30

PERUGINI, ELEONORA. "The Application of Video-Monitoring Data to Understand Coastal and Estuarine Processes." Doctoral thesis, Università Politecnica delle Marche, 2019. http://hdl.handle.net/11566/263695.

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La presente tesi riguarda l’uso dei dati raccolti da una nuova stazione di video monitoraggio, denominata SGS allo scopo di accrescere la conoscenza dei processi idro-morfodinamici caratteristici di una spiaggia sabbiosa naturale tipica della costa Adriatica, in prossimità di un estuario. La stazione è stata installata all’interno del porto di Senigallia e ogni ora registra un video di dieci minuti a 2Hz. In questa tesi, sono stati elaborati i video raccolti dal 2015 al 2017. Le immagini derivanti sono state utilizzate in due differenti analisi: 1) lo studio della capacità di stimare la batime

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31

Rouas, Guy. "Étude et modélisation par éléments finis des processus hydrosédimentaires estuariens." Compiègne, 1996. http://www.theses.fr/1996COMPD884.

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L'objet de ce travail a consisté à proposer et développer une gamme de modèles pour la simulation des processus hydrosédimentaires en estuaires. Dans une première partie, un modèle bidimensionnel vertical aux éléments finis résolvant les équations couplées de l'hydrodynamique, du transport du sel et des sédiments en suspension, et enfin de l'évolution des fonds soumis à l'érosion et au dépôt a été établi. La fermeture du système nécessite l'écriture de relations constitutives complémentaires exprimant les termes turbulents, la vitesse de chute moyenne du sédiment en fonction de sa concentratio

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32

Emptage, Matthew Robert. "Radionuclide distribution in relation to sedimentary processes in the Esk estuary, UK." Thesis, Lancaster University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357310.

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33

Gomes, Filho Jose Gerardo Ferreira. "Pre- and post-settlement processes influencing the distribution of barnacles along estuarine gradients." Thesis, University of Plymouth, 2007. http://hdl.handle.net/10026.1/2409.

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Estuaries are the interface between freshwater systems and the sea, with clearly recognizable changes in the distribution of organisms along various environmental gradients from riverine to fully marine conditions. This thesis studied ecological processes affecting the distribution of marine species along estuarine gradients using both field and laboratory experiments with barnacles as a tractable model system. Elminius modestus Darwin, Semibalanus balanoides Linneaus, Chthamalus montagui Southward are the most common barnacle species found in the intertidal of British estuaries. Surveys perfo

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34

Ali, Ayub. "Physical Processes of a Shallow Subtropical Estuarine System : Coombabah Lake, Gold Coast, Australia." Thesis, Griffith University, 2010. http://hdl.handle.net/10072/366810.

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Estuaries are of immense importance to many communities. It has been estimated that 60 to 80 % of commercial marine fishery resources depend on estuaries for part, or all of, their life cycle. The characteristics of estuarine flow, water quality and sediment conditions are important as they play a critical role in the functionality and health of these systems. This study utilised both field data and numerical modelling technique to help enhance our understanding of the physical processes of a very shallow subtropical estuarine system. This study first quantified various salt flux components wi

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35

Geronilla, Kristina. "Re-presenting the Waterfront: revealing the intersection of human and natural processes." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/35894.

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Water and waterfronts are appealing to almost any person, as a visitor or designer. This study challenges the author's design processes and understanding of the landscape as the sculpted meeting ground, intersecting human and natural physical processes. It progresses from assumptions through collaborated ideas of others in a literature review through case studies of various waterfront situations and finally to the design project of the Jones Point waterfront in Alexandria, Virginia. Here the intermingled aspects from cultural activities over time and local, physical movement of land by water

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Narvaez, Diaz Carla. "Green urchin demography in a subartic ecosystem : patterns and processes." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/33303.

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Dans les environnements littoraux de l’Atlantique Nord, les densités importantes d’oursin vert Strongylocentrotus droebachiensis ont entraîné la décimation des laminaires et l’apparition de grandes étendues dénudées où la biodiversité et les services écosystémiques sont fortement limités. Par contre, l’oursin vert a une grande valeur commerciale et son élevage en aquaculture représente une activité pour laquelle un intérêt grandissant est observé. Toutefois, il s’agit malheureusement d’une pêcherie ayant une évolution temporelle en dents de scie. Une gestion appropriée des populations d’oursin

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Qu, Wenchuan. "Studies on nitrogen cycling processes in Lake Illawarra, New South Wales, Australia." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20050302.161641/index.html.

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Schneider, Suzanne Zvalaren Willey Joan D. "Mercury sources and cycling processes in the Cape Fear River estuary, North Carolina." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2009. http://dc.lib.unc.edu/u?/etd,2906.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2010.<br>Title from electronic title page (viewed Jun. 23, 2010). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Marine Sciences." Discipline: Marine Sciences; Department/School: Marine Sciences.

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Bronikowski, Jason Lee. "Sedimentary environments and processes in a shallow, Gulf Coast Estuary-Lavaca Bay, Texas." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1098.

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Sedimentation rates in sediment cores from Lavaca Bay have been high within the last 1-2 decays within the central portion of the bay, with small fluctuations from river input. Lavaca Bay is a broad, flat, and shallow (<3 m) microtidal estuary within the upper Matagorda Bay system. Marine derived sediment enters the system from Matagorda Bay, while two major rivers (Lavaca & Navidad) supply the majority of terrestrially derived sediment. With continuous sediment supply the bay showed no bathymetric change until the introduction of the shipping channel. Processes that potentially lead to se

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Yasin, Ahmad Raza. "Sedimentary deposits, processes and evolution of the sandy, macrotidal Duddon Estuary, northwest England." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292903.

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Larcombe, Piers. "The post-glacial evolution and present-day sedimentary processes of the Mawddach Estuary." Thesis, Bangor University, 1992. https://research.bangor.ac.uk/portal/en/theses/the-postglacial-evolution-and-presentday-sedimentary-processes-of-the-mawddach-estuary(45824215-5e60-4c6b-b29e-017319409c81).html.

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The Mawddach Estuary and Barmouth Bay now occupy what was a deeply incised glaciated valley at the last ice maximum. This valley is now filled by a complex suite of sediments, up to 75m thick at the present estuary mouth, which record increasing marine influence. A regressive coastline is also present today. In the Bay, Welsh glacial drifts were eroded to form deep depressions, infilled by complex cross- stratified Late- or Postglacial sediments, overlain by a parallel-stratified sequence, perhaps formed behind a coast-parallel morainal barrier. Net sediment transport of the fine sand in the B

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Gao, Guanghai. "Numerical modelling of hydrodynamic and sediment-bacteria interaction processes in estuarine and coastal waters." Thesis, Cardiff University, 2008. http://orca.cf.ac.uk/54738/.

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A study has been undertaken to investigate and improve the representation and modelling of a range of various hydrodynamic, biochemical and sediment transport processes relating to the transport of enteric bacteria organisms in estuarine waters. In this study a relatively simple turbulence model was first further investigated to predict the complex three-dimensional flow structure in a flume with vegetation. The main purpose of this part of the study was to try and acquire accurate velocity profiles of complex flows without the need for a more advanced two-equation turbulence model, requiring

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Pidduck, Emma Louise. "The importance of micro-scale processes on the release of macro-nutrients from estuarine suspended sediments." Thesis, University of Plymouth, 2016. http://hdl.handle.net/10026.1/5378.

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The quality of water within an estuary is inseparable from the component parts; suspended particulate matter (SPM) and the balance of macro-nutrients. Long-term temporal variations and the horizontal advection of both SPM and macro-nutrient concentrations are well-constrained, but the vertical fluxes associated with micro-scale processes, such as turbulence and flocculation, are poorly constrained. The importance of three micro-scale processes on the interactions between SPM and inorganic macro-nutrients, nitrate (NO–3 ), ammonium (NH+4) and phosphate (PO3 –4 ), are examined in four field camp

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Duffy, B. "Phase transfer processes affecting the chemistry of iron and manganese in river-estuary systems." Thesis, University of Southampton, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356766.

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Davis, Edgar V. "Circulation and transport processes for the Pocomoke River a tributary to partially mixed estuary /." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/3264.

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Thesis (M.S.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Marine, Estuarine, Environmental Sciences Graduate Program. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Cahyono, M. "Three-dimensional numerical modelling of sediment transport processes in non-stratified estuarine and coastal waters." Thesis, University of Bradford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520623.

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Details are given herein of the development, refinement and application of a higher-order accurate 3-D finite difference model for non-cohesive suspended sediment transport processes, in non-stratified estuarine and coastal waters. The velocity fields are computed using a 2-D horizontal depth-integrated model, in combination with either an assumed logarithmic velocity profile or a velocity profile obtained from field data. Also, for convenience in handling variable bed topographies and for better vertical resolution, a δ-stretching co-ordinate system has been used. In order to gain insight int

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47

Larsen, Genevieve Ruth. "Modelling hydrodynamic processes within Pumicestone Passage, Northern Moreton Bay, Queensland." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16634/1/Genevieve_Larsen_Thesis.pdf.

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Estuaries can be considered as vital natural resources and are unique ecosystems at the interface between terrestrial and marine environments. The increase of population density centred on these coastal features and associated anthropogenic activities such as trade, industry, agriculture and recreation can adversely affect these sensitive environments. The Pumicestone Passage, located in northern Moreton Bay, Australia, is one such estuarine environment where there are concerns about degradation of water quality resulting from rapid land use change. These changes are both immediate to the P

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Larsen, Genevieve Ruth. "Modelling hydrodynamic processes within Pumicestone Passage, Northern Moreton Bay, Queensland." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16634/.

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Estuaries can be considered as vital natural resources and are unique ecosystems at the interface between terrestrial and marine environments. The increase of population density centred on these coastal features and associated anthropogenic activities such as trade, industry, agriculture and recreation can adversely affect these sensitive environments. The Pumicestone Passage, located in northern Moreton Bay, Australia, is one such estuarine environment where there are concerns about degradation of water quality resulting from rapid land use change. These changes are both immediate to the Pas

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Ali, Elham Mahmoud. "Processes and conditions influencing phytoplankton growth and bloom iniation in a macrotidal estuary, Southampton Water." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274569.

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Thomas, Shaun. "The response of anaerobic prokaryotic processes and communities in Severn Estuary sediments to environmental change." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/69981/.

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The Severn Estuary in the south-western UK is one of the most tidally dynamic environments on the planet. However, despite this the sediments of the estuary remain relatively understudied with regards to their biogeochemical potential. The aim of this project was to investigate how the constantly changing sedimentary environment in the estuary, in which millions of tonnes of sediment are eroded and deposited over the tidal cycle, affects the prokaryotes within the sediments and the processes they control, and also to determine what effect environmental changes in the estuarine system might hav

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