🧱 1. #Dam Definition: A wall built across a river or stream to block or store water. Purpose: Store water for irrigation, drinking, or industrial use. Generate hydroelectric power. Control floods by regulating river flow. Example: Hoover Dam (USA), Aswan High Dam (Egypt). 🌊 2. #Dyke Definition: A wall built to stop flooding from the sea or rivers. Purpose: Protect low-lying land from being flooded. Often used in coastal or riverbank areas. Example: The Netherlands has many dykes to prevent sea