List any 3 disadvantage of constructing dams on river?

1.	List any 3 disadvantage of constructing dams on river?
Answer» 1. Dams interfere with natural flora and fauna of river system. 2. Dams CREATE atmosphere for breeding of mosquitoes. 3. Dams prevent fish migration. 4. Dams destroy ecology and environment during construction which is irreversible. 5. In hilly REGIONS hills become fragile and keep sliding for years after. 6. Debris obtained during construction somehow flows back into the dam from dumping sites. 7. Its failure can be catastrophic. 8. Downstream farmers are disadvantaged. Marine life suffers. 9. But they have their inherrant ADVANTAGES in controlling floods, providing cheapest HYDRO power.

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List any 3 disadvantage of constructing dams on river?

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