Hydroelectric
power is the cheapest way to generate electricity. The cost is 0.77 cents per kwh compared to
coal at 2.07 cents per kwh and natural gas at 2.83 cents per kwh.
We need
to create reservoirs to ensure water supplies for consumption and irrigation
and divert water to prevent floods and should also build hydroelectric plants
at reservoirs to generate electricity.
All
flood-prone areas need to look at creating reservoirs with hydroelectric plants
to serve as a way to prevent future flooding, ensure reserve water supplies
during droughts and provide water recreation and real estate developments.
Questions and Answers About Large Dams
A: A large dam is defined by the dam industry as one higher than 15 metres (taller than a four-story building). There are more than 57,000 large dams worldwide. There are more than 300 major dams - giants which meet one of a number of criteria on height (at least 150 metres), dam volume and reservoir volume.
Q. Which countries have the most large dams?
A: China has over 23,000 large dams. The US is the second most dammed country with some 9,200 large dams, followed by India, Japan, and Brazil.
Q. How many are being built today?
A: The rate at which large dams are completed has declined from around 1,000 a year from the 1950s to the mid-1970s to around 260 a year during the early 1990s. More than 3,700 hydropower projects are planned or under construction on the world’s rivers as of 2014.
A: The majority of large dams are built for irrigation; almost all major dams are built for hydropower. Nearly one-fifth of the world’s electricity is generated by dams. Dams also provide flood control, supply water to cities, and can assist river navigation. Many dams are multipurpose, providing two or more of the above benefits.
Q: Surely we need dams to produce cheap and clean electricity?
Hydroelectricity is cheap to produce -- once dams are built. The problem is the huge costs of building dams and the long time it takes to build them. The Itaipu Dam was built on the Parana River on the border between Brazil and Paraguay. The cost was $19.6 billion and took 13 years to build. It was the largest Dam ever built.
A: A large dam is defined by the dam industry as one higher than 15 metres (taller than a four-story building). There are more than 57,000 large dams worldwide. There are more than 300 major dams - giants which meet one of a number of criteria on height (at least 150 metres), dam volume and reservoir volume.
Q. Which countries have the most large dams?
A: China has over 23,000 large dams. The US is the second most dammed country with some 9,200 large dams, followed by India, Japan, and Brazil.
Q. How many are being built today?
A: The rate at which large dams are completed has declined from around 1,000 a year from the 1950s to the mid-1970s to around 260 a year during the early 1990s. More than 3,700 hydropower projects are planned or under construction on the world’s rivers as of 2014.
A: The majority of large dams are built for irrigation; almost all major dams are built for hydropower. Nearly one-fifth of the world’s electricity is generated by dams. Dams also provide flood control, supply water to cities, and can assist river navigation. Many dams are multipurpose, providing two or more of the above benefits.
Q: Surely we need dams to produce cheap and clean electricity?
Hydroelectricity is cheap to produce -- once dams are built. The problem is the huge costs of building dams and the long time it takes to build them. The Itaipu Dam was built on the Parana River on the border between Brazil and Paraguay. The cost was $19.6 billion and took 13 years to build. It was the largest Dam ever built.
Q.
What is a large dam? How many large dams are there?
Q: What are the
benefits provided by large dams?
Hydroelectric power produced 35% of the total renewable electricity in the
U.S. in 2015, and 6.1% of the total U.S. electricity
Norb
Leahy, Dunwoody GA Tea Party Leader
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