Hard Engineering Case Study - Three Gorges Dam Flashcards Preview

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Flashcards in Hard Engineering Case Study - Three Gorges Dam Deck (21)
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1

Where is the Three Gorges Dam?

On the Yangtze River, China

2

How big is the dam?

181m tall and 2.3km across

3

How much land was flooded to build the dam?

632km2

4

How many settlements were destroyed?

13 cities, 140 towns and 4500 villages

5

How much did the dam cost?

£25.5billion

6

When was the dam completed?

2003

7

What was a social benefit of the dam?

The people living downstream were no longer flooded as severely or as often because the volume of water could be controlled

8

What is an economic benefit of the dam?

It is the largest source of hydroelectric power in the world, producing a 11% of China's electricity

9

How is a social disadvantage counteracted by a social advantage?

Although 100,000 people were forced to move, millions were saved from severe flooding downstream

10

How does the dam benefit trade?

The river can now carry much larger cargo ships, so more goods can be transported and sold

11

The dam produces the same amount of electricity as...

...50 million tonnes of coal

12

How else does the dam impact the economy?

-Tourists come to visit it
-China doesn't have to buy the equivalent 50 million tonnes of coal to produce electricity
-Boats and tourist cruisers are popular

13

What environmental benefits does the dam have?

-No burning of fossil fuels
-Renewable energy
-No contribution to global warming

14

How are local farmers benefited?

The dam system provides irrigation to grow crops

15

What are the environmental disadvantages of the dam?

-Water levels are fluctuating, meaning that the valley sides are saturated, making land slides common
-Industrial and human waste carried by the river gets stuck in the reservoir

16

What is a social effect of the landslides?

Many houses and buildings have fallen into the river because of them

17

Why is the amount of water the reservoir can hold decreased?

250 million tonnes of waste gets stuck in the reservoir, taking up volume

18

What could happen in the event of an earthquake?

The dam could rupture, leading to mass floods

19

What is the effect on endangered animals such as the pink river dolphin?

They cannot move down the river, decreasing their numbers

20

How much money was set side to help relocate those who had to be moved?

$30 million

21

What happened to the money set aside to help relocate people?

It was taken by China's corrupt officials