Rhedir gan School of Ocean Sciences

20.000 Credyd neu 10.000 Credyd ECTS

Semester 2

Trefnydd: Dr Martin Austin

1. To introduce the basic physical processes involved in sediment transport in the marine environment, including the hydrodynamic (boundary layer) processes associated with currents and waves;
2. Examine differences between the behaviour of coarse and fine sediment in relation to entrainment, deposition and transport (including turbidity currents);
3. Explain the important role of bed forms (ripples, dunes, bars) in wave and current flows;
4. Explain practical approaches for the measurement of sediment transport rates in the sea, and simplified modelling approaches for the estimation of sediment transport rates.

The course will be taught using a combination of lectures, practical sessions, computer exercises and workshops/seminars.

This course provides an introduction to the dynamics of entrainment, transport and deposition of non-cohesive and cohesive sediments in coastal waters. The topics covered include:

• physical mechanisms of sediment transport, and physico-chemical controls of sedimentation;
• tidal and wave boundary layers;
• sediment transport in steady and oscillatory flows;
• initiation of motion and shields criterion;
• bed load motion;
• sediment entrainment and suspension;
• bed forms in steady and oscillatory flow;
• measurement and estimation of sediment transport rates;
• geotechnical and hydraulic interpretation of sediments textures and structures;
• origin and nature of bed forms, ripples, dunes, bars;
• density currents and avalanches: low density turbidity currents versus avalanches.

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You will spend time in the laboratory observing and measuring sediment transport, and learning the basic principles and methods of sampling sediment in the marine environment.

trothwy

Basic understanding of knowledge (subject-specific theories, concepts and principles) of the processes of sediment dynamics based on the directly taught programme; Basic ability to define and solve numerical problems using appropriate techniques, and to interpret the results.

da

Good understanding of knowledge (subject-specific theories, concepts and principles) of the processes of sediment dynamics based on the directly taught programme; Good ability to define and solve numerical problems using appropriate techniques, and to interpret the results.

ardderchog

Thorough understanding of knowledge (subject-specific theories, concepts and principles) of the processes of sediment dynamics based on the directly taught programme; Thorough ability to define and solve numerical problems using appropriate techniques, and to interpret the results.

1. Understand the fluid-seabed interactions that generate the benthic boundary layer, the subsequent form of the boundary layer and the resultant bed shear stresses under steady and oscillatory flows.

2. Be able to quantifiably describe the formation and evolution of sedimentary bedform features, and understand their contribution to wider sediment transport and seabed dynamics.

3. Draw quantitative conclusions about sediment transport based on the analysis of given field data sets

4. Understand the concepts of sediment entrainment leading to bed load sediment transport and the progression to sediment suspension due to the balance of turbulent upthrust and sediment settling.

5. Be able to use Matlab or similar software to manipulate and analyse numerical datasets to provide quantitative answers to sediment transport problems

6. Have demonstrable knowledge of the physical, chemical and biological factors that control cohesion and flocculation processes.

Math	Enw	Disgrifiad	Pwysau
GWAITH CWRS	Sedimentary Bedforms (JB)		20.00
GWAITH CWRS	Particulate Density Currents (JB)		5.00
GWAITH CWRS	24-hour take home assignment (MA + JB)		50.00
GWAITH CWRS	Awel y Mor Cable Route		25.00

		Oriau
Lecture	24 lectures/tutorials/in-class demonstrations, duration 1 hour, 3 times per week	24
Practical classes and workshops	4 practicals on benthic boundary layers, instrumentation, sediment settling and experimental bed form dynamics; 2 hours each	6
Tutorial	5 drop-in help sessions providing support on course materials, 1 hour each	5
Private study	During 'Private Study', students work with field and laboratory data. They tackle two of the assessments (practicals) with reference to reading material and own practical/field data on experimental bed form dynamics and tidal rhythmites. The two remaining assessments (problem sheets) require reference to wider reading linked to material in the course handouts.	157
Seminar	Q&A type sessions with student groups and instructors to solve sedimentary problems.	8

• Rhifedd - Medrusrwydd wrth ddefnyddio rhifau ar lefelau priodol o gywirdeb
• Defnyddio cyfrifiaduron - Medrusrwydd wrth ddefnyddio ystod o feddalwedd cyfrifiadurol
• Hunanreolaeth - Gallu gweithio mewn ffordd effeithlon, prydlon a threfnus. Gallu edrych ar ganlyniadau tasgau a digwyddiadau, a barnu lefelau o ansawdd a phwysigrwydd
• Archwilio - Gallu ymchwilio ac ystyried dewisiadau eraill
• Adalw gwybodaeth - Gallu mynd at wahanol ac amrywiol ffynonellau gwybodaeth
• Dadansoddi Beirniadol & Datrys Problem - Gallu dadelfennu a dadansoddi problemau neu sefyllfaoedd cymhleth. Gallu canfod atebion i broblemau drwy ddadansoddiadau ac archwilio posibiliadau
• Cyflwyniad - Gallu cyflwyno gwybodaeth ac esboniadau yn glir i gynulleidfa. Trwy gyfryngau ysgrifenedig neu ar lafar yn glir a hyderus.
• Gwaith Tîm - Gallu cydweithio'n adeiladol ag eraill ar dasg gyffredin, ac/neu fod yn rhan o dîm gweithio o ddydd i ddydd
• Dadl - Gallu cyflwyno, trafod a chyfiawnhau barn neu lwybr gweithredu, naill ai gydag unigolyn neu mewn grwˆp ehangach

Rhestrau Darllen Bangor (Talis)

http://readinglists.bangor.ac.uk/modules/osx-3006.html

Gorfodol mewn cyrsiau:

• F650: BSC Geological Oceanography year 3 (BSC/GEO)
• F62F: BSc Geological Oceanography year 3 (BSC/GEOF)
• 8S54: BSc Geological Oceanography (with International Experience) year 4 (BSC/GEOIE)
• F7F6: BSc Ocean and Geophysics year 3 (BSC/OGP)
• F652: MSci Geological Oceanography year 3 (MSCI/GO)
• F734: MSci Physical Oceanography year 3 (MSCI/PO)

Opsiynol mewn cyrsiau:

• F841: BSC Coastal Geography year 3 (BSC/COASTG)
• F842: BSc Marine Geography year 3 (BSC/MARG)
• CF17: BSC Marine Biology/Oceanography year 3 (BSC/MBO)
• F700: BSC Ocean Science year 3 (BSC/OS)
• F840: BSc Physical Geography and Oceanography year 3 (BSC/PGO)
• F712: MSci Marine Biology and Oceanography year 3 (MSCI/MBO)
• F71P: MSci Marine Biology and Oceanography with Placement Year year 4 (MSCI/MBOP)