1. Hydrology and Fluvial Geomorphology Case Study Flashcards
1
Q
What is this case study
A
The Ngongotaha Flood
2
Q
When did it happen
A
29 April 2018
3
Q
What caused it to happen
A
A period of heavy rainfall in the Rotorua district
Overwhelming of streams, wastewater and stormwater
4
Q
What kind of storm was it
A
A 100-year-storm
5
Q
What were the impacts of it
A
Damage to local community
Erosion damage
Demonstrated that the local infrastructure could not handle it
6
Q
What was the damage that it did to the local community
A
It surprised the local residents with its force and speed
Sewage spilled through overflowing manholes
Local wildlife park was flooded
Local Marae was damaged
7
Q
How can flood risks be managed?
A
Afforestation Removal of blocakges Harden river banks Pump stations Diversion channels
8
Q
How could the local infrastructure be improved
A
Develop risk management plan Maintain the stream enlarge the channel Structural works, pumps, dams Building regulations
