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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Fluid mud modelling

Crapper, Martin January 1995 (has links)
No description available.
2

The use of corn pollen and glass beads to estimate fine particulate organic matter retention /

Ehrman, Terrence Patrick, January 1994 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 55-68). Also available via the Internet.
3

Theoretical modeling and experimental studies of particle-laden plumes from wastewater discharges

Li, Chunying, Anna. January 2006 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2006. / Title proper from title frame. Also available in printed format.
4

Factors influencing sediment re-suspension and cross-shore suspended sediment flux in the frequency domain /

Kularatne, Kottabogoda Angidigedera Samantha Rangajeewa. January 2006 (has links)
Thesis (Ph.D.)--University of Western Australia, 2006.
5

The effects of urbanization on the streambed sediment characteristics in a ridge and valley watershed /

Thames, Brantley Allison, January 2005 (has links) (PDF)
Thesis (M.S.) -- University of Tennessee, Knoxville, 2005. / Title from title page screen (viewed on July 5, 2005). Thesis advisor: John S. Schwartz. Document formatted into pages (x, 146 p. : col. ill., maps (some col.)). Vita. Includes bibliographical references (p. 84-89).
6

Interannual variability of nearbed sediment flux and associated physical processes on the Eel River shelf, Northern California, USA /

Guerra, Josefa Varela. January 2004 (has links)
Thesis (Ph. D.)--University of Washington, 2004. / Vita. Includes bibliographical references (leaves 108-113).
7

Observations of cross-shore sediment transport and formulation of the undertow /

Guannel, Gregory E. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2010. / Printout. Includes bibliographical references (leaves 121-131). Also available on the World Wide Web.
8

Measurements and modeling of suspended-sediment transport on the northern California continental shelf /

Sherwood, Christopher R. January 1995 (has links)
Thesis (Ph.D.)--University of Washington, 1995. / Vita. Includes bibliographical references (leaves [163]-173).
9

The application of a two-dimensional sediment transport model in a Cumberland Plateau mountainous stream reach with complex morphology and coarse substrate

Johnson, Daniel Hale. January 2008 (has links) (PDF)
Thesis (M.S.)--University of Tennessee, Knoxville, 2008. / Title from title page screen (viewed on Sept. 23, 2009). Thesis advisor: John S. Schwartz. Vita. Includes bibliographical references.
10

Processus d’incision des rivières à fond rocheux - simulations numériques en éléments discrets / Bedrock river incision process - a discrete element method based simulation

Aubert, Guilhem 03 December 2014 (has links)
Des études de terrain, expérimentales et numériques ont été menées pour rendre compte de l'incision des rivières à fond rocheux par le transport sédimentaire. Toutefois, le caractère fluctuant du système étudié rend difficile l'établissement de lois générales. La thèse s'articule autour de l'analyse des résultats fournis par un programme informatique qui simule la mise en mouvement de sédiments par un écoulement turbulent. La modélisation et l'intégration des interactions entre les sédiments et le fluide ainsi que les contacts entre sédiments se basent sur la description mécanistique du système. La validation du modèle numérique a été effectuée par la comparaison de paramètres dont les valeurs pour des rivières naturelles ou expérimentales sont abondantes dans la littérature. Le nombre de Shields critique de mise en mouvement, la relation entre la vitesse du fluide et le débit de sédiment sont ces grandeurs de références. Le travail échangé entre les sédiments et le fond est comptabilisé et ce flux d'énergie est rattaché au taux d'érosion avec des paramètres mécaniques de la roche. Nous avons établi une relation entre le taux d'érosion et le nombre de Shields. Les variations du taux d'incision avec masse de sédiment présente dans le lit de la rivière montrent que nous reproduisons le « tool-effect » et le « cover-effect ». Nous prédisons l'existence d'un nombre de Shields critique propre à l'incision qui est supérieur au nombre de Shields critique de transport. Les travaux échangés entre la couverture sédimentaire et les parois du canal permettent de quantifie le taux d'érosion latérale. Les travaux échangés au sein de la couverture sédimentaire sont utilisés pour évaluer le taux d'usure des sédiments. À partir du bilan de puissance du sous-système couverture sédimentaire, nous proposons un scénario pour la croissance du chenal d'une rivière à fond rocheux. Plusieurs études paramétriques rendent compte de l'influence de la rugosité du fond, du coefficient de restitution et de la gravité. / Field measurements, empirical studies and numerical approaches had been led in order to explain bedrock river incision due to transport of sediments. However, the studied system is roughly fluctuating, what make difficult to establish general laws. The thesis is based on the analysis of data extracted from a numerical code that simulate the motion of sediment by a turbulent flow. The interactions between the sediments and the fluid and the contact between sediments are modeled on physical basis and integrated following the principles of mechanics. The numerical process has been validated by comparison between two parameters extracted from natural rivers and experimental setup. The critical Shields number for sediment transport and the relationship between flow velocity and flux of sediments has been compared to values taken from literature. The work of dissipative forces between sediments and bedrock is computed. We propose a quantification of vertical incision rate based on rock resistance parameters. We have established a relationship between incision rate and Shields number that fit with a power law. We reproduce the two antagonistic effects that rules incision process: tool-effect and cover-effect. We predict the existence of a critical Shields number for incision that is higher than sediment transport threshold. We quantify the lateral incision rate with the work of dissipative forces between channel benches and sediments. We also quantify the attrition rate of the sediments with the value of energy dissipated within the sediment cover. The power balance of the sub-system sediment cover gives basis that lead to a scenario for bedrock river channel growth. Other results about influence of bedrock roughness, coefficient of restitution and surface gravity on incision rate are exposed.

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