Omg! The Best Hydroelectric Dam Ever For Hydroelectric Power!

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Hydroelectric power from hydroelectric dam

Introduction :

Rivers are a great resource for drinking water and food. Without them, it would be difficult to irrigate the land and move people and goods from one town to another. However, in order to be able to survive comfortably along deep rivers, we need to make those interventions called Hydroelectric dams. These dams produce hydroelectric power. For example, since ancient times, people have been constructing dams on the rivers to adjust the flow of water. Of necessity, the primary purpose of constructing dams is to avoid flooding. 

In some particularly humid regions of the world, the water level can rise following heavy rains and this can result in catastrophic flooding. Dams are often built to create a water reservoir which in turn can be used both for general purposes and for agricultural needs. After diverting the waterway, the water in the valley spills and forms a perfect reservoir for such purposes. Unfortunately, a wide region surrounding it also floods, which is why it is so important to evacuate local residents before the building of large dams.

How do hydroelectric dams work

Humans have been harnessing the power of water for thousands of years. The potential energy of water has been used to operate mills, spin pumps and many other uses. However, converting the potential energy of water to electrical energy is a relatively new concept. You need two things to produce electricity using a hydro dam. The abundance of water and a distance in height between the intake and the inlet side of the dam. This difference in depth is referred to as the head. This difference in elevation is referred to as the head. The headwater is located upstream of the dam and the tailwater downstream. The dam separates the headwater and tailwater.

Image by Google| Image source : Wikimedia Commons

Water enters the penstocks through the main inlets. The water then passes through the penstocks until it enters the hydroelectric turbine installed inside the power plant. If the water flows through each runner of the turbine, the runners spin and we receive mechanical energy. Mechanical energy from turbine runners is transmitted to electrical generators which are attached to traditional shafts. We have now converted the water’s potential energy into electrical energy and can distribute this through a transformer and a high-voltage National Grid. To bring an end to the process, the water flows from the power station through the draft tubes until it enters the tailwater. The whole mechanism is continuous, leading to a steady and efficient method of power generation.

Advantages :
  1. Hydroelectric dams provide a continuous and efficient means of supplying adequate water.
  2. They represent a renewable form of energy and produce no waste products.
  3. They’re also very efficient and cheap to operate.
  4. Not just that, but the hydro dams have a very long operational life. Some hydro plants have been in operation for over a hundred years.
Disadvantages :
  1. Hydroelectric dams will greatly damage local ecosystems due to the significant improvements needed to establish the conditions necessary by the dam. These adverse effects are felt by both plants and animals alike. This is by far the greatest downside associated with the hydro dams
  2.  The dams are very expensive to construct and have very high initial costs compared to other types of power plan. Unfortunately, the risk of loss associated with hydro dams is not always minor and the consequences can be devastating. Catastrophic failure of hydro dams can often lead to immediate and large amounts of flooding to much of the area downstream of the dam. 

World’s largest hydroelectric dams

The top 10 world’s largest hydroelectric dams. Hydroelectricity is one of the leaders of the clean energy industry, responsible for more than 16% of global electricity generation, with projected annual growth in demand of 3.1%. China is currently the world’s leading producer of hydroelectric power with 4  dams on the top 10 list, responsible for 17% of domestic electricity demand. Hydroelectricity is an attractive option in the clean energy industry due to its comparatively low cost. Flexibility in terms of supply relative to demand and lower greenhouse gas emissions due to fossil fuel plants. An average home uses 1 MW of power for 6 to 8 months.

1.Three Gorges Dam,China

With a massive generating capacity of 22.5 gigawatts, the three gorges dam is the biggest hydro dam in the world. China had begun dreaming up this dam in 1919 and in 2008 it became alive. It is a beast of a hydro dam and is a marvel of modern engineering. Located in the middle of china this hydropower station supplies power to the middle eastern and southern China that is within 400 to 1000 kilometres. When the three gorges dam was constructed, 39 trillion kilograms of water was drawn from the river Yangtze, built up behind it, which increased the water level to 175 meters above sea level. NASA has calculated that the dam slows the rotation of the earth by 0.06 microseconds.

Image by Google | Image source : Nikkei Asia

2. Itaipu dam-Brazil & Paraguay border

Itaipu Dam is a hydroelectric dam situated on the borders of Paraguay and Brazil.  The resource used to power the dam is the Parana River, which creates a natural buffer between the two countries. Occasionally, this dam has higher production than the number one location. With 14 gigawatts of installed capacity, it is quite impressive. In 1994, the American society of civil engineers chose the Itaipu dam as one of the seven new wonders of the world.

Image by Google | Image source : EOI-Schools of Industrial Organization

3. Xiluodu,China

This dam has a generating capacity of 13,860 MW and provides flood control for the region. It is brand new and it was commissioned in 2013.

Image by Google|Image source : Ilikesuperengineering

4.Guri Dam,Venezuela

The Guri Dam is huge. It is 7,426 meters long and 162 meters tall. It is also very old since it was commissioned in 1978. Currently, it has a generating capacity of 10235 MW. On 7 March 2019, just before 5 p.m. local time, this hydroelectric scheme failed to leave much of Venezuela’s 32 million people in darkness.

Image by Google| Image source: dialogochino


This dam was the first large-scale hydropower project in the amazon was commissioned in 1984 and has a generating capacity of 8370 MW. The tucurui dam has brought electricity to 13 million people, and 60% of the power is diverted to businesses that generate just under 2,000 employment.

Image source : Google | Image by : EJAtlas-Environmental Justice Atlas

6. Xiangjiaba,China

The dam exists on the tributary of the Yangtze River and has a generating capacity of 6400 MW. This dam is also very new beginning operations in 2012. The Xiangjiaba project was estimated to displace about 85 000 people during its construction and operation. More than 8 000 people were relocated before the construction started according to official sources.

Image Source : Google| Image by : nrgedge

7.Grand Coulee,USA

Washington state’s Grand Coulee Dam is a classic. It has been operating since 1933 and is one of the largest in the world.  This dam has a generating capacity of 6809 MW and is currently undergoing a major overhaul. It was designed to generate hydroelectric power and to provide irrigation water.

Image source : Google | Image by : U.S. Bureau of Reclamation


This dam is also known as the Krasnoyarsk sea. It is an artificial lake which was created by the construction of the Krasnoyarsk stamp. It’s one of the biggest artificial reservoirs in the world. This dam was originally online in 1972 and has been in operation since then. It is based in southern Russia and has a generating capacity of 6000 MW.

Image source : Google | Image by : Avax News

9. Longtan dam,China

The longtan dam is the tallest of its type in the world and has a generating capacity of 6426 MW power. It is relatively new and it was only commissioned in 2007. The dam is intended to be built for hydroelectric power production, flood control and navigation.

Image source : Google | Image by : rccdams

10.Robert-bourassa dam, Canada

This plant is part of the James Bay project in Quebec and has a capacity of 5616 MW. It is the world’s 8th biggest dam. The dam was designed from 1974 to 1981 and has a reservoir capacity of 61.7 billion cubic meters covering a surface area of 2815 square kilometres. The dam height is 162 meters and 2 kilometres in length.

Image source : Google | Image by : constructionreviewonline

The latest largest construction of a dam which was to be commissioned in 2019 is Belo Monte dam along the Xingu River in Brazil. After its commissioning in near future, it will be the second-largest dam in the world. The project cost of constructing this dam is whooping 13 billion U.S dollars.

Largest hydroelectric power generating countries worldwide in 2019(in terawatt-hours)

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