River Brock, Lancashire Case Study Flashcards Preview

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Flashcards in River Brock, Lancashire Case Study Deck (27)
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1
Q

What type of catchment does the River Brock drain?

A

An entirely rural catchment

2
Q

How long is the River Brock?

A

17.8km long

3
Q

Whereabouts is the River Brock located?

A

In the Forest of Bowland

4
Q

Where do the headwaters drain?

A

In steep millstone grit hills in the north and in carboniferous limestone in the south.

5
Q

What type of material is on the high moors?

A

Peat

6
Q

What is the lower catchment overlain by?

A

Boulder clay

7
Q

Is the flow completely natural?

A

The flow is almost completely natural

8
Q

What do Myerscough Agricultural College have a licence for?

A

Abstracting a maximum of 45.46m3 daily and 16,529.9m3 annually

9
Q

What does the regime of the river depend upon?

A

The pattern of rainfall

10
Q

Which year was a particularly wet one?

A

2012

11
Q

Which month received the most rainfall in 2012? What was the exact number?

A

December 225mm

12
Q

Which month received the least rainfall in 2012? What was the exact number?

A

March 31mm

13
Q

How does the rainfall level for Chipping, Lancashire differ between 1995 and 2012?

A

Almost 2X higher in 2012 than in 1995

In 1995- Jan was the driest month and Nov was the wettest

14
Q

Where was the most severe flooding?

A

The village of St Michael’s on Wyre

15
Q

When were the severe floods at St Michael’s on Wyre?

A

October 1980

16
Q

What has been put in place since this flood?

A

Comprehensive flood protection

17
Q

Where has a flood storage basin been built?

A

At Catterall to the north of the River Wyre in the area of St Michael’s

18
Q

What is the flood storage basin for?

A

A one-in-fifty-years flood

19
Q

What is the capacity of the flood storage basin?

A

1.7million m3 of floodwater

20
Q

What has been raised and strengthened and where?

A

Embankments in the lowland area close to the River Wyre.

21
Q

What are warnings issued for as a part of the flood protection in St Michael’s?

A

One-in-five-years floods

22
Q

How many sandbags does the council store?

A

2000

23
Q

What are given out by the council?

A

Sandbags

24
Q

Where is there a 1 in 100 years probability of flooding?

A

In the area of St Michael’s to the south of the River Wyre

25
Q

What does the steep sided nature of the Brock Valley mean?

A

Flooding is not a problem until the river approaches the confluence with the River Wyre.

26
Q

Why is the confluence with the River Wyre much flatter?

A

It is a former glacial outwash plain.

27
Q

Why is St Michaels a low priority for the environment agency?

A

The land use is agricultural