Transcript Development of hill slopes

Development of hill slopes
Do activity 8.1, T 83
Reasons for developing hill slopes in
Hong Kong
Urban development
Reasons for developing hill slopes in
Hong Kong
Hong Kong is _______
and lowland is
hilly
_______
limited for urban development.
The growth of _________
population and economic
activities in Hong Kong lead to a greater
demand for land.
houses offices,
Land is used to build ______,
_________,
roads, _______
and parks
factories
rails
Reasons for developing hill slopes in
Hong Kong
Exploiting natural resources
Reasons for developing hill slopes in
Hong Kong
There is great demand for _________
housing and
farming from hill slopes.
_________
They are very useful for construction and
__________.
recreation
Therefore, some hill slopes are developed as
quarries
_________.
Some hill slopes are terraced to form
farmland, e.g. terraced rice fields in Sichuan
Reasons for developing hill slopes in
Hong Kong
Recreation
Mountain slopes sometimes are covered
by snow, hence good for skiing.
Some mountainous areas in Hong Kong
which are good for hiking are developed
country
as _________
parks since they are not
urban
suitable for _______development.
Other uses of hill slopes
Farming
Forestry
Recreation
Generating hydro-electric power
Other uses of hill slopes
Farming
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Slopes are terraced to form farmland
Terraced rice fields
Other uses of hill slopes
Forestry

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Cutting of trees
Timber
Other uses of hill slopes
Recreation
- Winter sports
e.g. Skiing
Other uses of hill slopes
Recreation
- Country park
- hiking
- development of tourism
Other uses of hill slopes
HEP (hydro-electric power)
- large dams
- Many HEP stations are established
along the middle course of Huang He
and Chang Jiang
Three Georges
Slope Management
1 Reduce the stress of slopes
- constructing a good drainage
system
- restricting development on
slopes
- reducing the gradient of slopes
Slope Management
2 We can strengthen the slopes by
- planting more trees
- tree roots can help to hold the soil particles
and absorb excessive rain water
Slope Management
- building retaining wall to prevent
slopes from collapsing
Slope Management
- Covering cement over bare slopes
Slope Management
3 There should be regular inspection and
maintenance of slopes
(a)
(b)
Slope Management
Landslip warning should be made to
alert the public
The End