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How would you design a programme of fieldwork and research to investigate
the effectiveness of coastal management schemes?
Porlock (managed retreat) and Minehead (12.6 million hard engineering
schemes) SW Somerset
Cost benefit analysis was used at Minehead we used a land use survey (goad
map) to find out the value of the land being protected. We used this information by
putting it into a cost-benefit ratio our ratio came to 2.08, therefore the benefits
outweighed the costs.
Flood risk can be calculated by multiplying likelihood (height above sea level by
using a portable GPS device) by severity (value of buildings). These results could be
plotted on GE graph software, as colour gradients represent likelihood and height
A bipolar evaluation of defences (from -3 to 3) creates an indication whether the
defences were beneficial for a certain area. E.g. you could see that the Victorian
groynes at Porlock were almost useless, compared to the hard engineering at
Minehead. The results can be plotted on a graph, either above or below the X axis
depending on whether they are positive or negative. However this could be
subjective, so a questionnaire aimed at a stratified sample of local residents would
be advised to improve reliability.
Questionnaires provide quantitative data which could be graphed up and means,
medians and modes could be calculated. Qualitative opinions of key stakeholders
could be typed into wordle.com (a word cloud of key words/phrases) to be
Digital photos of land uses and features can be annotated.
The beach profile can be three dimensionally mapped to reveal areas of weakness
to flooding and erosion this can show cross sections, from which the volume of
sediment could be calculated. This can be done by using clinometers and tape
local newspapers e.g. the West Somerset gazette, news archives on the
internet and local government websites e.g. www.westsomersetonline.gov.uk are
a good source of finding articles about past events. This info can be analysed by
wordle.com for common problems.
Websites such as www.Where'sthepath.co.uk can provide old and new map archives which
can then be used to compare and analyse rates of erosion, land uses and contour lines to
show areas susceptible to flooding over time.
Flood maps e.g. on www.climatechangewales.org.uk can be used to see the prediction of
flooding in specific areas after a particular rise of sea level.