How many KW is a Litre of diesel?
10 kWh
Which fuel produces the most energy?
hydrogen
What is an disadvantage of hydropower?
Hydropower has the ability to generate electricity without emitting greenhouse gasses. However, it can also cause environmental and social threats, such as damaged wildlife habitat, harmed water quality, obstructed fish migration, and diminished recreational benefits of rivers.
What is the advantage and disadvantage of hydropower?
Pros and cons of hydropower
| Pros of hydropower | Cons of hydropower |
|---|---|
| Renewable energy source | Some adverse environmental impact |
| Pairs well with other renewables | Expensive up-front |
| Can meet peak electricity demand | Lack of available reservoirs |
Who built the first dam?
ancient Egyptians
How do humans build dams?
Gravity dams are so named because they are held to the ground by gravity – they weigh a lot, and are typically made from concrete or stone. Engineers must de-water the river where the dam is meant to be built. This is done by diverting the river through a tunnel that runs around the intended construction zone.
Do we need dams?
Dams are important because they provide water for domestic, industry and irrigation purposes. Dams often also provide hydroelectric power production and river navigation. Dams and their reservoirs provide recreation areas for fishing and boating. They help people by reducing or preventing floods.
What are the positive effects of dams?
- Hydroelectric power is made when water passes through a dam.
- Dams and waterways store and provide water for irrigation so farmers can use the water for growing crops.
- Dams help in preventing floods.
- Since the water stored in dams is fresh water, it can then be used for drinking water in nearby towns and cities.
What is the biggest dam in the world?
World’s Tallest Dam Currently, the tallest dam in the world is Nurek Dam on the Vakhsh River in Tajikistan. It is 984 feet (300 meters) tall. Hoover Dam is 726.4 feet (221.3 meters) tall. Today, Hoover Dam still ranks in the top 20 of the tallest dams in the world, but only in the concrete gravity and arch categories.
How do dams benefit the economy?
A dam and reservoir may support navigation, recreation, flood control, irrigation, and water supply, with each multipurpose benefit providing significant social and economic impacts on a local, regional, and national level. When federal dams are built, they are authorized by Congress to serve one or more functions.