Flashcards in ✅Case Study - Pickering Beck Deck (24)
What is Pickering Beck?
A river in North Yorkshire
How far does the beck run for?
29km (18 miles)
Which National Park is the beck located in?
The North York Moors
Why is the river prone to flooding?
Due to the steep sided valley that the water runs off into the beck
Which government scheme was piloted in the town?
'Slowing the Flow'
When does the beck flood in particular?
In the summer, flash flooding
How many times was the town flooded between 1999 and 2007?
How much did the 2007 flood cost in damage?
How can rainfall increase chance of flooding?
Rainfall in the area is heavy and hydrographs flashy. Peak discharges fluctuate
How does the geology affect flooding?
It consists on Gritstone and Limestone, permeable and porous allowing the water to flow through. Soil is also soft and sandy, so permeable, slow lag time
How does the local relief affect flooding?
The drainage basin has steep relief in the hills of the North York Moors, decreasing time taken to reach the river
How does the vegetation affect flooding?
Largely moorland shrubs and heather, growing in peat bogs which can soak up water, preventing run off and further flooding. If water is redirected for agriculture or forestry, peat dries out
What are the main land uses in the river catchment area?
Forestry and woodland
How has the town impacted flooding?
Impermeable surface increase run off rates
How have farming practices impacted the river?
Farming has lead to diffuse pollution, lowering the water quality
What was adopted to manage flooding?
A land management technique instead of hard defences
What was constructed at Newtondale?
A large low level bund to hold up to 120,000m3 in flood events to store water
What was planted around the river catchment?
19ha of hydrophillic plant such as alder and willow trees to create a natural barrier to flood flows
What was constructed in the river catchment?
Large woody debris damns, and natural gullies to help water drain from moorlands into forests
How many Large Woody Debris Dams have been constructed in Pickering Beck catchment?
How much farm woodland has been planted?
How many heather bale dams have been constructed?
Why were no-burn zones established?
As burning has the potential to speed up run off by lowering interception and promoting hydrophobic soil conditions