Artificial lakes, also known as reservoirs, are man-made bodies of water created by damming rivers or streams. They serve various purposes, including water supply for drinking and irrigation, hydroelectric power generation, and recreational activities like fishing and boating. These lakes can also help control flooding by storing excess water during heavy rainfall. Additionally, they provide habitats for wildlife and can enhance local ecosystems. Examples of artificial lakes include Lake Mead in the United States and Lake Nasser in Egypt, both of which play significant roles in their respective regions.