River Quaggy Restoration Scheme Flashcards Preview

AS Geography > River Quaggy Restoration Scheme > Flashcards

Flashcards in River Quaggy Restoration Scheme Deck (19):
1

What river is Quaggy a tributary of?

River Ravensbourne

2

Since when has river Quaggy been heavily managed and how?

1960s

- Artificial channels, culverts diverted water away from Greenwich

3

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

Lewisham and Greenwich

- Needed protecting

4

Who proposed the scheme

Locals - formed Quaggy Waterways Actions Group 1990

5

When was the scheme introduced?

2002

6

7 parts of scheme

- 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

Where was a new channel cut through at

Sutcliffe Park

8

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

Chinbrook Meadows

300 meters removed

9

Why did some culverts remain

To take some water underground when discharge very high

10

Why was a new lake formed?

To store water when culverts full

11

Why was the park lowered and shaped like a floodplain

Naturally collects water = stops water flowing downstream and flooding Lewisham

12

What characteristic of the area made this scheme possible?

Lots of green space

13

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

85,000 m^3

35 Olympic swimming pools

14

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

600 in Lewisham and Greenwich

15

What effect did the removal of concrete banks have?

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

16

2 other environmental benefits

- 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

What award did the scheme win and when?

Natural Environment category 2007

'Waterways Renaissance Award' and 'Living Wetland Award'

18

4 factors show effectiveness of scheme

- No major flooding since project completed
- Long term and sustainable
- low cost compared to hard engineering
- Few maintenance costs

19

Where does the river quaggy run through?

South east London