|
Rivers - Revision
Notes
The earth’s
crust is modified by fluvial processes which result in distinctive landforms.
Long and cross profiles, processes of erosion (hydraulic power, corrosion,
corrasion, attrition), transport (traction, saltation, suspension, solution)
and deposition.
How a river profile changes downstream and the relative importance of
the processes at work such as the typical V shaped valley in the upper
course where vertical corrasion dominates.
The characteristics and formation of waterfalls, gorges, meanders, ox-bow
lakes, levees, flood plains and deltas.
Students will be expected to be able to name an example, describe each
feature and to explain its formation making reference to the processes
at work.
Recognise and describe fluvial features on Ordnance Survey maps and photographs.
There is an opportunity in this section to revise OS skills as well as
to introduce photographic interpretation etc.
The interaction between people and fluvial environments.
River basin management issues – the causes and effects of flooding in
river basins in the context of both LEDCs and MEDCs.
River basin management issues should be studied in the context of both
LEDCs eg. Bangladesh and MEDCs eg. the European floods of the 1990’s or
the Gloucester floods. One case study from the MEDW and LEDW should be
chosen to study the physical and human causes of flooding and the impact
of the floods.
TV news is a good source of up to date information.
The short, medium and long term strategies used to attempt to manage the
floods.
Contemporary issues concerning use of ‘hard’ v ‘soft’ strategies and attempts
to achieve sustainability.
The social, economic, environmental and political issues that have an
impact upon strategies and the values and attitudes of interested groups.
Flood management should include efforts to prevent flooding and strategies
used to ameliorate the impact. Students should be aware of how and why
the methods used are different between the LEDW and MEDW and now currently
there is a move away from hard engineering e.g. dams on the Colorado to
softer approaches e.g. flood plain zoning, improved warning system. |
visit these
web links to help you revise for the rivers section
1. Learn
on the Internet
main page =
www.bbc.co.uk
2.
BBC - basic revision
3.
S-Cool pages - quite good
4.
UK Flooding Case study
5.
US Geological Society - Big US floods - where they happen and why
6.
Environment Agency Flood pages
7.
Lynmouth flood disaster
8.
Bangladesh floods 1 (BBC)
9.
Bangladesh Flood 1998
9.
Bangladesh Flood Warning Centre
|