Showing posts with label landfill. Show all posts
Showing posts with label landfill. Show all posts

Tuesday, September 15, 2009

Chapter 7:Responses to rising demand for land (Increasing supply of land and Conservation)

Hi guys,

Here is a re-cap on the last bit of Chapter 7: Responses to rising demand for land

Besides, increasing the price, which I have touched about on the concept of Price mechanism, below are the two other ways to meet the rising demand for land.

Increasing the supply of land:
1) Land Clearance: Clearing forests and demolishing buildings
2) Land Reclamation: Landfill method, Empoldering, reclaiming derelict land
3)Maximising existing landuse: Maxmising urban landuse (mixing urban landuse and high density building)

Mixing urban landuse (examples: Sengkang and Jurong)


High density building


Conservation of land
1) Nature parks, wetlands or in general other green spaces.



Friday, September 4, 2009

Chaper 7: Land Reclamation ( 3 methods)

In class, I have gone through with you that land reclamation is the creation of dry land from an area covered by water. Land reclamation can also refer to the process of recovering land that is damaged and abandoned and making it usable again.

There are three major methods that for land reclamation:
1)Landfill: create land by draining waterlogged areas such as swamps and marshes and filling them with material like sand to form dry land.
2) Empoldering: method of creating land from the sea through the use of polders.
3) Reclaiming derelict land:
-->Poor farming practices:
1) Through usage of fertilizers.
2) Letting the land lie fallow.

-->Mining activities:
1)Spoil banks have to be levelled
2)Mining pools filled.
3)Chemicals can be introduced to treat acidic soil
4)Vegetation planted to prevent soil erosion.