Module GEOG3461: DYNAMICS OF GRAVEL-BED RIVERS

Department: GEOGRAPHY

GEOG3461: DYNAMICS OF GRAVEL-BED RIVERS

Prerequisites

• Any Level 1 or level 2 module in Geography or other appropriate evidence.

Corequisites

• NONE

Excluded Combination of Modules

• NONE

Aims

• To provide students with an understanding of the interrelations between form and process in gravel-bed rivers, and the implications for how channels adjust to various kinds of forcing.

Content

• Flow in river channels: fluid motion, turbulence, flow resistance, secondary circulation, forces on the bed, variation in space and time.
• Bedload transport: characterisation of river beds, entrainment, transport rates, selective transport. ???
• Channel configuration: armouring and downstream fining, bedforms.
• Reach-scale behaviour: sediment budgets, aggradation & degradation, effects of major floods, effects of selected kinds of direct or indirect human interference.

Learning Outcomes

• Explain the basics of fluid motion and bedload transport.
• Distinguish characteristic types of channel morphology and bedform.

• Relate general principles to specific situations including case studies of channel change.
• Be aware that river behaviour varies according to time and space scales, and can affect & be affected by human activity

• Perform simple calculations explained in lectures/practicals and extract patterns from data. Present logical written and oral arguments.

Modes of Teaching, Learning and Assessment and how these contribute to the learning outcomes of the module

• Lectures will help students understand basic principles and get to grips with the recommended reading selected from the multidisciplinary scientific literature. Some will be case studies, to reinforce students??? understanding of basic principles and show how they can be applied. Last 15 mins of most lectures will be devoted to discussion. Reading lists, handouts, and abbreviated versions of powerpoint lectures will be posted on DUO to assist student learning.
• Field visits will reinforce understanding whilst also showing the complexity of real-world situations. They will involve prior briefing, group work, and individual follow-up. Students will be required to submit a report on one visit (their choice) for summative assessment.
• The written examination will complement the practical-based assessment by testing students??? understanding of basic principles and generic types of channel behaviour, and their ability to explain things clearly and support their argument with appropriate reference to the general literature and case studies.

Teaching Methods and Learning Hours

Summative Assessment

Formative Assessment:

Discussions during lectures and field visits

■ Attendance at all activities marked with this symbol will be monitored. Students who fail to attend these activities, or to complete the summative or formative assessment specified above, will be subject to the procedures defined in the University's General Regulation V, and may be required to leave the University