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Flashcards in Chapter 11 Deck (25):
1

Impermeable

Clay or granite

2

Most productive aquifer

Sandstone, limestone, layers of sand and gravel

3

Major uses of Water

Residential
Agricultural
Industrial

4

Most fresh water

Used to irrigate crops

5

% used for household activities (drinking and washing)

8

6

Average person uses ___ volume of water daily

300 L/ 80 gal

7

India: average daily water use

41L

8

Water treatment removes these elements which are poisonous even in low concentration and can occur naturally

Mercury
Lead
Arsenic

9

Common pathogens

Bacteria
Viruses
Protozoa
Parasitic worms

10

Drinking- Water Treatment

1. First filtration
2. Coagulation (flocs)
3. Second filtration
4. Chlorination
5. Aeration
6. Additional treatment

11

Wastewater Treatment Process

Primary Treatment
1. Filtration
2. First Settling Tank
Secondary Treatment
3. Aeration Tank
4. Second Settling Tank
5. Chlorination

12

Water uses

Manufacture goods
Dispose of water
Generate power

13

Water to produce 1 kg of aluminum

Nearly 1000L

14

Water used to manufacture a car

Almost 500000 L

15

Water needed to produce one ear of corn

300 L/ 80 gal

16

Aqueducts were built by the Romans how many years ago

Nearly 2000 years ago

17

% of world's electrical energy generated by hydroelectric dams

20%

18

Xeriscaping

A technique used to save water by designing a landscape that requires minimal water use.

19

Two underlying causes of water pollution

Industrialization
Rapid human population growth

20

Seven sources of non-point pollution

1. Chemicals added to road surfaces
2. Water runoff from city and suburban streets
3. Pesticides, herbicides, fertilizers
4. Feces and agricultural chemicals
5. Precipitation containing air pollutants
6. Soil runoff
7. Oil and gasoline from personal watercraft

21

Common groundwater pollutants

Pesticides
Herbicides
Chemical fertilizers
Petroleum

22

Amount of oil spilled yearly from tanker accidents into the ocean

37 million gallons

23

Cuyahoga River

1969, in Cleveland, Ohio was so polluted that the river caught on fire and burned for several days

24

Colorado River

Water is diverted for irrigation and drinking water for states such as AZ, UT, CA to the point that the river often runs dry before it reaches Mexico and the Gulf of California.

25

Permeable

Gravel