DRRR 4th

• Geological hazards

  Extreme natural events in the crust that will create a threat for humanity or any living things
• Geological hazards


  • Earthquakes
  • Volcanic eruptions
  • Landslides
  • Sinkholes
• Landslide


  The movement of debris rocks or any particles in the earth in the downslope
• Rainfall-induced landslide


  A type of landslide which comes with water in it due to heavy rainfall
• Sinkhole


  A naturally occurring geological hazard below the surface that collapses eventually, formed due to dissolving of rock beneath the surface, commonly limestone
• Types of sinkholes


  • Solution sinkhole
  • Cover collapse sinkhole
• Solution sinkhole

  The most common sinkhole, formed when the soil is very thin on the surface and exposing the bedrock, once it starts to rain the soil is carried out leaving a hole
• Cover collapse sinkhole


  The most dangerous type of sinkhole, happens when water penetrates the topsoil going to the limestone and dissolves it until the surface collapses
• Landslide


  The movement of debris, rocks or any particles in the earth in the downslope
• Rainfall-induced landslide


  A type of landslide which comes with water in it, aside from debris and rocks, due to heavy rainfall
• Sinkhole


  A naturally occurring geological hazard below the surface that collapses eventually, also called "karst terrain"

  
• Types of sinkholes


  • Solution sinkhole
  • Cover collapse sinkhole
  • Cover subsidence sinkhole
• Solution sinkhole


  The most common sinkhole, formed when the soil is very thin on the surface and exposes the bedrock, causing the soil to be carried out by rain and leaving a hole

  
• Cover subsidence sinkhole


  The most common with a semi-permeable surface like sand, where the limestone is dissolved below the surface due to rain, causing the space to be filled by the downward movement of particles
• Limestone is a type of rock that is commonly dissolved in the process of sinkhole formation
• Factors affecting sinkhole and landslide include rainfall
• Geologists refer to the terrain where sinkholes form as "karst terrain"

  
• It is defined as the movement of rock debris or earth down the slope.

  landslide
• Extreme natural events in the crust of the earth that pose a threat to life and

  property

  geological hazard
• A topographic depression formed when underlying limestone bedrock is dissolved

  by groundwater

  -sinkhole
• example of geological hazard excep

  -hurricane
• type of rock that dissolve and cause a sinkhole

  -limestone
• sinkhole is an example of

  -geological hazard
• most dangerous type of sinkhole

  -collapse
• type of geological hazards that carries debris and particles

  -landslide
• type of sinkhole where the limestone is xposed and covered in thin layer of soil

  -solution
• other term used by geologist in the sinkhole

  -karst terrain