Local scale river catchment case study (Pickering Beck) Flashcards Preview

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Flashcards in Local scale river catchment case study (Pickering Beck) Deck (8)
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1

location

England - Yorkshire

2

why is it susceptible to flooding

geology (gritstone and limestone) so ground quickly becomes saturated- increased surface run off
is also fed by numerous tributaries- increases volume of water in the main channel

3

2007 floods - economic impact in the Yorkshire and Humber region

damage estimated at £2.1 billion

4

compare the river discharge in May and June 2012 at Pickering Beck

4.5 cumecs in June and 0.5 cumecs in May- increased by 9 times- peaks and troughs

5

relief of the area and how this exacerbates flooding

steep relief= faster run off= river reaches bank full discharge quicker. also limits the width of the river- so it holds a smaller volume of water

6

vegetation

'grips' are in place that cut through the peat to improve drainage and create faster run off. result in faster channel flooding.
heather burning also occurs

7

flood management- what are the 3 main principles

to slow water at the top of the catchment
to store water in the middle catchment
to improve water flow passing through the bottom of the catchment

8

example of flood management strategy

woody debris dams- slows down water flow (100 in pickering beck)