Rainfall-Induced Geological Hazards

• Landslide

  ground movement on a sloping terrain
• Sinkholes

  depressions or holes on the ground that resulted from the collapse of the surface layer of the soil
• Types of Rainfall-Induced Geological Hazard

  1. Landslides
  2. Sinkholes
• Warning Signs (Landslide)

  1. Water Saturated Grounds in areas that are typically not
  2. Soil that Loosens and Moves Away
  3. Cracks or Bulges in cemented grounds or walls
  4. Underground Utility Lines are Broken
• Warning Signs (Sinkholes)

  1. Groundwater becomes Cloudy, Acidic, Silted, or Soiled
  2. Poles suddenly Leaning, slumping, sagging, Slanting, or Bent
  3. Ponds form Puddles that Never Disappeared
• Scientific Tools

  Landslide: Laser Range Finder

  equipped with tiltmeter measures slope angle, soil compaction, soil strength
• Scientific Tools

  Sinkholes: Ground Penetrating Radar (GPR)

  provide images of subsurface ground
• Landslide Prone Provinces

  1. Marinduque
  2. Rizal
  3. Cebu
  4. La Union
  5. Southern Leyte
  6. Benguet
  7. Nueva Ecija
  8. Batangas
  9. Mountain Province
  10. Romblon
• Dark- high

  Green- moderate

  Yellow- low