Lesson 6 Task 1 Answers
1. B - Dam
2. The dam helps to hold back flood waters and control the flow of water within the river's channel.
3. The first way it affects the environment negatively is that it causes large areas of land behind the dam to be flooded permanently to create the reservoir. This can destroy habitats. The second way it affects the environment negatively is that is reduces the amount of water that flows downstream. This can again destroy habitats as it reduces the amount of water available for ecosystems. Finally it can be negative for the environment as water that is in the reservoir flows slower than in the normal river channel, which can cause the water quality to be decreased.
4. Soft engineering does not involve building artificial structures, but takes a more sustainable and natural approach to managing the potential for river flooding.
5. Hard engineering involves building artificial structures which try to control rivers. They tend to be more expensive.
2. The dam helps to hold back flood waters and control the flow of water within the river's channel.
3. The first way it affects the environment negatively is that it causes large areas of land behind the dam to be flooded permanently to create the reservoir. This can destroy habitats. The second way it affects the environment negatively is that is reduces the amount of water that flows downstream. This can again destroy habitats as it reduces the amount of water available for ecosystems. Finally it can be negative for the environment as water that is in the reservoir flows slower than in the normal river channel, which can cause the water quality to be decreased.
4. Soft engineering does not involve building artificial structures, but takes a more sustainable and natural approach to managing the potential for river flooding.
5. Hard engineering involves building artificial structures which try to control rivers. They tend to be more expensive.