River Dijle Flashcards
1
Q
Source of river
A
Source is in Wavre and the river flows to Leuven
2
Q
Population of leuven
A
100 000
3
Q
Causes of the hazard
A
- heavy rainfall
- soil was already saturated
- climate change makes heavier rain more likely
- removal of vegetation
- increase in impermeable surfaces
- towns and farmlands built close too river
4
Q
Impacts of the hazard
A
- deaths
- cars swept away
- crops destroyed
- spa race circuit damaged
- buildings collapsed
5
Q
Opportunities of the river
A
- fertile farmland
- kayaking
- leisure activities
- cafes, bars, river side walks
- property boom in the city
- attracts industry such as brewery Inbev
6
Q
Floodplain restoration cost
A
1.4 million
7
Q
Floodplain restoration
A
Ecological approach
- natural flood zone
- egenhoven reservoir
8
Q
Natural flood zone
A
- dismantling drainage ditches to allow water table to rise
- bank vegetation trimmed
- trees allowed to fall into river which slows down the flow
- more meanders formed to slow down the flow
9
Q
Egenhoven reservoir
A
- 400 meter diversion channel
- capable of storing 800 000 meters cubed of water
- creates washland area
- sluice gate can be closed in times of floods
10
Q
Length of diversion channel
A
400 meters
11
Q
How much water can the egenhoven reservoir store
A
800 000 meters cubed
12
Q
Flood in 2021
A
42 died
railways in SW closed
foundations of buildings eroded and buildings collapsed
spa race circuit damaged
crops destroyed
cars swept away
41 000 homes had no electricity
