Landslides

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  • Landslides
  • Steep gradient 25 - 60 angle
  • Hyrdometerological- Preceptation, temperature, water content
  • Weathering - temperature and heat
  • Main causes of landslides need sediment to have a
  • Steep gradient/ topography
  • heavy and weight
  • water content
  • Vegatation are binding agents that consolidate the soil to prevent landslide
  • Human causes
  • deforestation- removal of stability
  • agriculture
  • settlement/ urbanisation- hyper concernated
  • noise/ recretion
  • mining
  • climate change - heavy rain/prolonged rain
  • Influence EL NINO teleconnections causing rainfall
  • Increasing frequency and magnitude
  • Snowmelt causing unconsolidate soil causing landslides

HTemperature causing snow,elt to become los causing increase frequency of avalanches. The increase in weight in earlier periods because of the change in the Earth's surface temperature.

Landslides are from of movement occures when gravity overcomes the force of friction cause dby seismic activity, coastal risk, increase population in marginal land, dumping waste.

Distribution of landslides occur at plate boundaries, seismic activity, cyclone belts and steep gravity (mountianous region)

Fatal landslides in Asia becayse of the destructive boundary in Himalayas

--- coastal regions becuase of Typhoons, increased percipation

Monsoon seasons

Frequency of typhoons

High levels of risk

Hyperconcernated

Population live on marginal land

3000 cities in coastal zones

affects of climate change

Causes of Landslides

  • water reduces the friction between the bedrock and the overlying sediment and gravity sends the debris downhall.
  • Earthquake - if Earth crusts vibrate enought to disrupt the force of friction holding sediments in place
  • Deforestation/ Wildfire - plants help to stablize the soil by holding it together with their roots, the loss of vegetation after a fire or deforestation makes the land unstable

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