Hard Engineering River Management

What is one advantage of building dams and reservoirs?

• They can provide leisure activities such as water sports.
• They are the cheapest option available.
• They do not impact the river ecosystem.
• They require no maintenance.

What is a disadvantage of channel straightening?

• It is a very inexpensive solution.
• It reduces the need for dredging.
• It can increase sedimentation and flood risk downstream.
• It can improve navigation and trade links.

How do embankments help manage flood risk?

• By making the river deeper and wider.
• By raising the river bank to hold more water.
• By diverting water to flood relief channels.
• By creating dams that stop water flow.

What is a key benefit of flood relief channels?

• They are always aesthetically pleasing.
• They can enhance property values and reduce insurance premiums.
• They require no maintenance once built.
• They increase the likelihood of flooding downstream.

What is a disadvantage of dams and reservoirs?

• They are simple to construct.
• They displace people and farmland.
• They help maintain river biodiversity.
• They can generate hydroelectric power.

Why might channel straightening increase flood risk downstream?

• It reduces the need for dredging.
• It improves the habitat for fish.
• It causes a loss of energy leading to deposition.
• It allows for faster water flow without obstruction.

What is a potential environmental downside of using concrete for embankments?

• They improve the aesthetic value of the river.
• They are the most cost-effective solution.
• They can destroy river habitats and biodiversity.
• They provide essential habitats for wildlife.

What is the purpose of a flood relief channel?

• To enhance fishing opportunities.
• To divert excess water during high discharge periods.
• To create a permanent barrier against flooding.
• To increase the water flow into the main river.

Which of the following is a disadvantage of using embankments?

• They effectively increase biodiversity.
• They are less expensive than other methods.
• They require no monitoring or repairs.
• They can be visually unappealing and disrupt habitats.

What is one advantage of channel straightening in river management?

• It allows for better control of sedimentation.
• It can protect local properties from flooding.
• It requires no engineering work.
• It is the cheapest method available.