Final answer:
The statement that is NOT a disadvantage of dams and reservoirs is that they increase normal downstream flooding; in fact, dams typically help control flooding. Common disadvantages include environmental disruption, displacement of communities, and obstruction of fish migration.
Step-by-step explanation:
The statement that is NOT a disadvantage of dam and reservoir systems is d. Dams and reservoirs increase normal downstream flooding. While dams and reservoirs do have various disadvantages, such as leading to devastating flooding if there is a failure, displacing people behind the dam, disrupting ecosystems, and disrupting migration of some fish, they do not increase normal downstream flooding. In fact, one of the advantages of dam and reservoir systems is flood control, where reservoirs can collect water during wet times and store it for use during dry spells.
The statement that is NOT a disadvantage of dam and reservoir systems is: Dams and reservoirs increase normal downstream flooding. Generally, one of the advantages of dams is their ability to provide flood control by regulating water flow downstream. The common disadvantages of dam and reservoir systems include the following:
- Dams and reservoirs can lead to devastating flooding if there is a failure.
- Dams and reservoirs often displace people who lived in the area that becomes the reservoir.
- Dams and reservoirs disrupt ecosystems by altering natural water habitats and flow regimes.
- Dams and reservoirs impede the migration of fish such as salmon, affecting their spawning processes.
Nonetheless, it is important to note that every dam and reservoir is different, and impacts can vary based on design, location, and management.