River Quaggy Restoration Scheme Flashcards Preview

AS Geography > River Quaggy Restoration Scheme > Flashcards

Flashcards in River Quaggy Restoration Scheme Deck (19)
Loading flashcards...
1
Q

What river is Quaggy a tributary of?

A

River Ravensbourne

2
Q

Since when has river Quaggy been heavily managed and how?

A

1960s

  • Artificial channels, culverts diverted water away from Greenwich
3
Q

Where were urban developments and why did this mean more protection was needed?

A

Lewisham and Greenwich

  • Needed protecting
4
Q

Who proposed the scheme

A

Locals - formed Quaggy Waterways Actions Group 1990

5
Q

When was the scheme introduced?

A

2002

6
Q

7 parts of scheme

A
  • Bring river back above ground
  • Cut new channel and form multifunctional park
  • Re-meandering and removing concrete lining
  • Improved management and quality of park
  • Culverts remained
  • New lake
  • Park lowered and shaped like a floodplain.
7
Q

Where was a new channel cut through at

A

Sutcliffe Park

8
Q

Where was re-meandering carried out and how much concrete lining removed?

A

Chinbrook Meadows

300 meters removed

9
Q

Why did some culverts remain

A

To take some water underground when discharge very high

10
Q

Why was a new lake formed?

A

To store water when culverts full

11
Q

Why was the park lowered and shaped like a floodplain

A

Naturally collects water = stops water flowing downstream and flooding Lewisham

12
Q

What characteristic of the area made this scheme possible?

A

Lots of green space

13
Q

How much water can the park store? How many Olympic swimming pools is this equivalent to?

A

85,000 m^3

35 Olympic swimming pools

14
Q

For how many homes and businesses did the scheme reduce flooding risk for?

A

600 in Lewisham and Greenwich

15
Q

What effect did the removal of concrete banks have?

A

Allowed natural process - erosion and deposition could occur = features formed e.g. Gravel Bars

16
Q

2 other environmental benefits

A
  • Diverse environment for wildlife
  • Wetland environment created by redirecting river to natural course and creating flood storage area = reed beds, wild flower meadows and trees
17
Q

What award did the scheme win and when?

A

Natural Environment category 2007

‘Waterways Renaissance Award’ and ‘Living Wetland Award’

18
Q

4 factors show effectiveness of scheme

A
  • No major flooding since project completed
  • Long term and sustainable
  • low cost compared to hard engineering
  • Few maintenance costs
19
Q

Where does the river quaggy run through?

A

South east London