River Brock, Lancashire Case Study Flashcards
What type of catchment does the River Brock drain?
An entirely rural catchment
How long is the River Brock?
17.8km long
Whereabouts is the River Brock located?
In the Forest of Bowland
Where do the headwaters drain?
In steep millstone grit hills in the north and in carboniferous limestone in the south.
What type of material is on the high moors?
Peat
What is the lower catchment overlain by?
Boulder clay
Is the flow completely natural?
The flow is almost completely natural
What do Myerscough Agricultural College have a licence for?
Abstracting a maximum of 45.46m3 daily and 16,529.9m3 annually
What does the regime of the river depend upon?
The pattern of rainfall
Which year was a particularly wet one?
2012
Which month received the most rainfall in 2012? What was the exact number?
December 225mm
Which month received the least rainfall in 2012? What was the exact number?
March 31mm
How does the rainfall level for Chipping, Lancashire differ between 1995 and 2012?
Almost 2X higher in 2012 than in 1995
In 1995- Jan was the driest month and Nov was the wettest
Where was the most severe flooding?
The village of St Michael’s on Wyre
When were the severe floods at St Michael’s on Wyre?
October 1980
What has been put in place since this flood?
Comprehensive flood protection
Where has a flood storage basin been built?
At Catterall to the north of the River Wyre in the area of St Michael’s
What is the flood storage basin for?
A one-in-fifty-years flood
What is the capacity of the flood storage basin?
1.7million m3 of floodwater
What has been raised and strengthened and where?
Embankments in the lowland area close to the River Wyre.
What are warnings issued for as a part of the flood protection in St Michael’s?
One-in-five-years floods
How many sandbags does the council store?
2000
What are given out by the council?
Sandbags
Where is there a 1 in 100 years probability of flooding?
In the area of St Michael’s to the south of the River Wyre
What does the steep sided nature of the Brock Valley mean?
Flooding is not a problem until the river approaches the confluence with the River Wyre.
Why is the confluence with the River Wyre much flatter?
It is a former glacial outwash plain.
Why is St Michaels a low priority for the environment agency?
The land use is agricultural
