Geomorphological Impacts of Dams and Irrigation Projects
Geomorphological Impacts of Dams and Irrigation Projects
Questions
What is the primary geomorphological impact of dam construction?
- Erosion
- Deposition
- Landslides
- Flooding
How do dams affect the sediment budget of a river?
- They increase the sediment load.
- They decrease the sediment load.
- They have no effect on the sediment load.
- They change the composition of the sediment load.
What is the term for the process by which sediment is deposited upstream of a dam?
- Aggradation
- Degradation
- Erosion
- Sedimentation
What is the term for the process by which sediment is eroded downstream of a dam?
- Aggradation
- Degradation
- Erosion
- Sedimentation
How do dams affect the morphology of a river channel?
- They make the channel wider.
- They make the channel narrower.
- They make the channel deeper.
- They make the channel shallower.
How do dams affect the sediment transport capacity of a river?
- They increase the sediment transport capacity.
- They decrease the sediment transport capacity.
- They have no effect on the sediment transport capacity.
- They change the composition of the sediment transport capacity.
What is the term for the process by which a river channel adjusts to a change in sediment load?
- Aggradation
- Degradation
- Erosion
- Sedimentation
How do dams affect the geomorphic diversity of a river?
- They increase the geomorphic diversity.
- They decrease the geomorphic diversity.
- They have no effect on the geomorphic diversity.
- They change the composition of the geomorphic diversity.
How do dams affect the ecological health of a river?
- They improve the ecological health.
- They degrade the ecological health.
- They have no effect on the ecological health.
- They change the composition of the ecological health.
What are some of the geomorphological impacts of irrigation projects?
- Erosion
- Deposition
- Salinization
- Waterlogging
How do irrigation projects cause erosion?
- By increasing the amount of water flowing through a river.
- By decreasing the amount of water flowing through a river.
- By changing the sediment load of a river.
- By changing the geomorphic diversity of a river.
How do irrigation projects cause deposition?
- By increasing the amount of water flowing through a river.
- By decreasing the amount of water flowing through a river.
- By changing the sediment load of a river.
- By changing the geomorphic diversity of a river.
How do irrigation projects cause salinization?
- By increasing the amount of water flowing through a river.
- By decreasing the amount of water flowing through a river.
- By changing the sediment load of a river.
- By changing the geomorphic diversity of a river.
How do irrigation projects cause waterlogging?
- By increasing the amount of water flowing through a river.
- By decreasing the amount of water flowing through a river.
- By changing the sediment load of a river.
- By changing the geomorphic diversity of a river.
What are some of the ways to mitigate the geomorphological impacts of dams and irrigation projects?
- Using sediment bypass channels.
- Planting vegetation along riverbanks.
- Using terraces and contour farming.
- All of the above