Lecture 21

Question 1

Manufacturing uses ____ _____ water and ____ much of it

Answer 1

Very dirty and recycles

Question 2

What consumes the most water in Canada and the world

Answer 2

Agriculture

Question 3

What is the only industry that doesn’t have to report how much water they consume?

Answer 3

Mineral extraction

Question 4

In 1900 how many million hectors of farmland was irrigated?

Answer 4

50

Question 5

In 1950 how many million hectors of farmland was irrigated?

Answer 5

94

Question 6

In 2000 how many million hectors of farmland was irrigated?

Answer 6

250

Question 7

In 2000 how much total farmland was there?

Answer 7

1.5 billion

Question 8

About how much of the total farmland in 2000 was irrigated and how much of the total food produced came from this irrigated farmland

Answer 8

1/6 and 1/3 of food

Question 9

Irrigation has fallen or exceeded population growth

Answer 9

Fallen behind

Question 10

What are 3 reasons why irrigation hasn’t raised on a global scale

Answer 10

1) Lack of global aid
2) Good locations are already used
3) Cost

Question 11

In China how much per Hector is it to irrigate the land?

Answer 11

$1500

Question 12

In Asia how much per hector is it to irrigate the land

Answer 12

$4000

Question 13

In Mexico how much per hector is it to irrigate the land?

Answer 13

$10 000

Question 14

In Africa how much per hector is it to irrigate the land?

Answer 14

$20 000

Question 15

What are 2 issues in regards to irrigation and the environment

Answer 15

a) Waterlogging

b) Salinization

Question 16

What is one example of overuse of irrigation for lakes

Answer 16

The inland Aral sea, was the 8th largest lake but now its currently almost fully dried up

Question 17

What is one example of a river that irrigation has overused

Answer 17

Colorado River in the USA

Question 18

What is the most productive agriculture zone in the USA

Answer 18

The Imperial Valley

Question 19

How is wild rice grown in California

Answer 19

They flood fields about waist high in the desert

Question 20

What are two examples of conflicts over the overuse of irrigation and water

Answer 20

a) The get-along-gang (Syria, Jordan, Israel) all use the Jordan river, they currently use 95% of stable run off but all 3 countries have said they are going to increase their individual use
b) The Nile river goes through and borders many countries and only the tail end goes through Egypt however since Egypt has the biggest army they control the whole river and say fuck em to everyone else

Question 21

What are three water supply strategies?

Answer 21

1) Charge full price for supply
2) Technical fixes
3) Reuse waste water

Question 22

What are 4 technical fixes that could be used to make water use more efficient on farms

Answer 22

a) Better sprinklers
b) Better water systems
c) Field leveling
d) Drip irrigation

Question 23

What is drip irrigation?

Answer 23

When water is applied to crops directly at the roots through a system of underground pipelines

Question 24

What’s one example of a community that reuses water and how much water is recycled?

Answer 24

Windhoela in Namibia , 23%