23 Questions
What happens when there is a sudden and large increase in river flow?
The river may not be able to hold the flow
Heavy rainfall and typhoons can cause a decrease in river flow.
False
What is the effect of deforestation on the soil?
The soil is easily washed away.
The height of land in China decreases from the highlands in the __________ towards the coast in the east.
west
Match the following physical factors with their effects on river flow:
Heavy rainfall and typhoons = Increase in river flow Low relief = Silting of rivers Global climate change = More extreme weather events
What is the result of silting in a river?
The river bed becomes shallower
The global climate has been changing constantly.
True
What is the effect of a shallow river bed on the river's holding capacity?
The holding capacity of the river channel is reduced.
What happens to the river flow when there is an increase in overland flow?
It increases
Reclaiming lakes for different uses can help reduce flooding.
False
What is the result of overgrazing on slopes?
The grass does not have enough time to recover.
The surface of much of the land is covered with __________, preventing rainwater from infiltrating into the ground.
concrete
Match the following human activities with their effects on river flow:
Poor farming practices = Increase in river flow Reclaiming lakes for different uses = Reduce holding capacity of lakes Urban development = Increase in river flow Good farming practices = Decrease in river flow
What is the main reason for farmers to engage in poor farming practices?
To produce more food and have more income
Sewers and drains in urban areas help to reduce flooding.
False
What is the effect of over-cultivation on slopes?
The soil becomes poor.
What is the first step in the process of flooding?
When rainfall is heavy, the rivers become full.
Flooding only causes damage to buildings and infrastructure in China.
False
What is one of the negative effects of flooding on the environment?
Polluting drinking water
The ______________________ parts of China, including the coastal areas, are more prone to the threat of flooding.
eastern and southern
Which of the following is NOT a cause of flooding in China?
Drought
Flooding only occurs in the western parts of China.
False
Match the following effects of flooding with their corresponding categories:
Injury and loss of life = Human Crop failure = Farming/Human Polluting drinking water = Environment/Human Damaging buildings and infrastructure = Transport/Human
Study Notes
What is Flooding?
- Flooding occurs when heavy rainfall causes rivers to overflow, spreading water onto surrounding land.
Impacts of Flooding in China
- Injury and loss of life
- Crop failure
- Damage to buildings and infrastructure
- Disruption to transport services
- Disruption to utility services and electric supplies
- Pollution of drinking water
- Spread of diseases
Areas Prone to Flooding in China
- Eastern and southern parts, including coastal areas, are more prone to flooding.
Causes of Flooding in China
Physical Factors
- Heavy rainfall and typhoons
- Low relief (gentle slopes)
- Silting (deposition of soil and sand in river beds)
Human Factors
- Deforestation (leads to silting and increased river flow)
- Poor farming practices (overgrazing and over-cultivation)
- Reclaiming lakes for different uses (reduces lake sizes and holding capacity)
- Urban development (concrete surfaces and sewers/divert rainwater quickly)
This quiz explores the issues of flooding in China, including its definition, impacts, prone areas, and causes. Test your knowledge on the effects of flooding in China.
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