4.4

Question 1

作物失收

Answer 1

Crop failure

Question 2

公用服務

Answer 2

Utility service

Question 3

沖積土

Answer 3

Alluvium

Question 4

容量

Answer 4

Capacity

Question 5

淤積

Answer 5

Silting

Question 6

濫伐林木

Answer 6

Deforestation

Question 7

土壤侵蝕

Answer 7

Soil erosion

Question 8

過度放牧

Answer 8

Overgrazing

Question 9

過度耕作

Answer 9

Over-cultivation

Question 10

下水道

Answer 10

Sewer

Question 11

梯田

Answer 11

Terrace

Question 12

清淤

Answer 12

Dredge

Question 13

貧瘠

Answer 13

Infertile

Question 14

Where does flooding usually occur

Answer 14

Low-lying area

Question 15

How does flooding occur

Answer 15

When rainfall is heavy rivers will easily become full river water in the channel will then flow over its banks and spread out onto the surrounding land

Question 16

What are the negative effects

Answer 16

Loss of life and injuries
Crop failure
Damaging buildings
Polluting drinking water

Question 17

What are the benefits of flooding

Answer 17

Bring alluvium
Enrich soil
Dissolve and remove salts from the soil

Question 18

How flooding occurs

Answer 18

When there is more water in river channel than it can hold

Question 19

What factors are affected how well a river can hold the water

Answer 19

The amount of river flow and the holding capacity of the river

Question 20

How heavy rainfall and typhoons cause flooding

Answer 20

If large amount of rainwater reach the river channel in a short period of time