Enzyme, Pharmaceutical Aids, Miscellaneous Last Part of Chapter no 5th.pdf
Dam Construction Project Proposal by Slidesgo.pptx
1. Topic – Hydro Energy
THREE GORGES
DAM: An engeneering
marvel
2. The Yangtze or Yangzi is the longest
river in Eurasia, the third-longest in
the world, and the longest in the
world to flow entirely within one
country. It rises at Jari Hill in the
Tanggula Mountains of the Tibetan
Plateau and flows 6,300 km in a
generally easterly direction to the
East China Sea. It is the fifth-largest
primary river by discharge volume in
the world.
the Yangtze
river
3. Construction and
dimention:
Made of concrete and steel, the dam is
2,335 m long and 185 m above sea level
at its top. The project used
27.2 million m3 of concrete (mainly for
the dam wall), used 463,000 tons of
steel, and moved about 102.6 million m3
of earth. The concrete dam wall is 181 m
high above the rock basis.
When the water level is at its maximum
of 175 m above sea level, 110 m higher
than the river level downstream, the dam
reservoir is on average about 660 km in
length and 1.12 km in width. It contains
39.3 km3 of water and has a total
surface area of 1,045 km2.
4. Fun fact:
It started with a dream. Sun Yat Sen,
considered the “Father of the Nation,”
envisioned a large dam on the Yangtze
River. It was part of his international
development plan for China back in
1919.
5. Duration:
In 1993 work started on access
roads and electricity to the site.
Workers blocked and diverted the
river in 1997, bringing to a close
the first phase of construction. In
2003 the reservoir began to fill,
the five-tier ship locks which
allowed vessels of up to 10,000
tons to navigate past the dam
were put into preliminary
operation, and the first of the
dam’s generators was connected
to the grid, completing the
second phase of construction.
Construction of the main wall of
the dam was completed in 2006.
6. Generation
capacity:
Power generation is
managed by China Yangtze
Power. The Three Gorges
Dam is the world's largest
capacity hydroelectric
power station, with
34 generators: 32 main
generators, each with a
capacity of 700 MW, and
two plant power generators,
each with capacity of
50 MW, for a total of
22,500 MW. Annual
electricity generation in 2018
was 101.6 TWh, which is 20
times more than the Hoover
Dam.
7. Economics:
The Chinese government estimated that the Three Gorges Dam project would
cost 180 billion yuan (US$22.5 billion or 187k crores inr). By the end of 2008,
spending had reached 148.365 billion yuan, of which 64.613 billion yuan was
spent on construction, 68.557 billion yuan on relocating affected residents,
and 15.195 billion yuan on financing. It was estimated in 2009 that the cost of
construction would be fully recouped when the dam had generated
1,000 terawatt-hoursof electricity, yielding 250 billion yuan; total cost
recovery was thus expected to be completed ten years after the dam became
fully operational. In fact, the entire cost of the Three Gorges Dam was
recovered by December 20, 2013.
8. Fun fact:
It generates as much electricity to
fulfill the electricity needs of new
Zealand, Ireland, Iceland, costa rica,
Bahamas combined.
9.
10.
11. Other benefits of this dam:
The other benefits of the Three Gorges Dam are flood control, power
generation, navigation, aquaculture, tourism, ecological protection,
environmental purification, development-oriented resettlement, transfer of
water from southern China to northern China, and water supply and
irrigation.
12. Fun fact:
How big is the Three Gorges Dam?
Well, big enough to affect the Earth’s
rotation! According to NASA, its
operation increases the length of a day
by 0.06 microseconds. It also made the
planet a bit rounder in the middle and
flat on the poles.
