Lecture 22 - Flood Risk Modelling & Assessment for Extreme Events Flashcards
1
Q
What is Natural Flood Management (NFM)?
A
A catchment based approach, to reduce impact of floods and droughts (Improve Biodiversity)
2
Q
What is the aim of NFM?
A
To reduce flood peak and arrival times downstream
3
Q
NFM achieved through 4 approaches which are:
A
- Increasing Storage/ Capacity
- Increasing Catchment & Channel Roughness
- Increasing Losses (increasing amount of water draining into ground
- de-synchronising peak flows from tributaries
4
Q
Examples of Natural Recovery
A
- Hedge and tree planting
- Peat restoration
- Contour Ploughing
5
Q
Examples of Design Restoration
A
- Slowing flow
- Woody debris or leaky dams
- Restoring meanders
6
Q
Examples of Enhance Engineering
A
- Online and offline storage areas
- Enhancing flood plain to delay filling and maximise channel capacity
