Hard engineering Flashcards
(12 cards)
What is the primary function of dams and reservoirs?
Controls river flow by blocking the river and creating a reservoir behind the dam
Dams allow for controlled water release.
List three positive aspects of dams and reservoirs.
- Energy production (HEP)
- Water storage
- Flood control
Dams can also provide recreational opportunities.
What is a negative consequence of creating a reservoir?
Loss of farmland and homes due to reservoir creation
Displacement of people is also a significant issue.
True or False: Dams and reservoirs can affect fish breeding.
True
Ecosystem impacts include altering natural habitats.
What happens to reservoirs over time?
Reservoir silts up over time
This can reduce storage capacity.
What does straightening channels involve?
Removing meanders from the river channel
This changes the natural flow of the river.
List two positives of channel straightening.
- Speeds up movement of water
- Allows easy navigation for boats
This can benefit transportation and reduce travel time.
What is a negative consequence of channel straightening?
May increase flood risk downstream
Faster discharge can lead to rapid flooding in other areas.
Fill in the blank: Embankments are used to ______ the banks of the river.
artificially raise
This increases channel capacity.
List two positives of embankments.
- Increased river capacity
- New river bank habitats may be created
This can enhance biodiversity.
What is a negative aspect of embankments?
Expensive
They can also be visually unattractive if made from concrete.
True or False: Embankments are guaranteed to prevent flooding.
False
They may fail and lead to more serious flooding.
