How are hydroelectric dams built?

The Three Gorges Dam is the largest hydroelectric dam in the world today. When built, the dam flooded a total area of ​​more than 63,131 hectares of land with 42 billion tons of water causing the Earth to slow down and increase the length of a day by 0.06 microseconds. So, how are dams with such a large scale and reserves built?

Details of the process of building a hydroelectric dam, please see the video below.

After the construction of the dam is completed, the reservoir is fully discharged. This process can happen naturally or with the help of a pump but can take up to several years. During this process, engineers will closely monitor the process to find defects in design or construction and handle them safely. If there are signs of leakage, cracking or erosion, repairs will be carried out immediately so that the dam can operate at its design capacity.

Top 5 largest hydroelectric dams in the world

The Three Gorges Dam, China can produce about 22,500MW of electricity with a construction cost of up to $37 billion.
Itaipu Dam, Brazil/Paraguay with a capacity of up to 14,000MW. The cost of building this dam is 19.6 billion USD.
The Khe Luodu Dam, China has an installed capacity of 13,860 MW. The cost to build this dam is $6.2 billion.
Guri Dam, Venezuela with a capacity of 10,235 MW. The dam is 7,426 meters long and 162 meters high.
Tucuruí Dam, Brazil with a plant installed capacity of 8,370MW

With the increasing level of technology, huge hydroelectric power plants are continuously springing up to meet the increasing global energy needs of people.

The machine system helps the bonsai to control the knife-holding robot arm
Concept video of a nuclear-powered aircraft with a speed of 4,000 km/h
The scene that took place inside the storm was recorded by the self-driving boat
Development of an electric device that separates hydrogen in the air to drive cars