This week 52 years ago, the construction of the Aswan High Dam started in Egypt. The total length is 3,830 meters, it is 980 meters wide and it has a reservoir of 111 cubic kilometer of water.
After the discovery of increased seismic activity in the reservoir of the Hoover Dam (USA) and in the reservoir of the Three Gorges Dam (China), the debate in China on the impact of dams went on. Now there is even a myth going around that the Three Gorges Dam influences the rotation of the earth.
And did you know that the largest dam in the world is the Nurek Dam in Tajikistan? With its 300 m height it is a massive piece of engineering. This dam is used for power generation, but dams can serve many functions including flood prevention, water supply, recreation and land reclamation.
Watch these videos to find out more on gains, losses, social and environmental impacts: Damming the Mekong, The problem of the Ohrid eel, Bujigali - six stories of resettlements or check out the Large Dam video category.