drrr

• landslide - also known as landslip. it is a ground movement on a sloping terrain because of the angle of the ground
• sinkholes - depressions or holes on the ground that resulted from the collapse of the surface layer or soil. these are natural formations that serve as an underground basin or a reservoir
• abney level and laser rangefinder - are landslide equipped with a tiltmeter is used to measure the slope angle
• ground penetrating radar - sinkholes are validated using GPR to provide images of subsurface ground
• geohazard mapping and assessment program - designed to provide accurate and detailed profile of terrain of the Philippine Soil
• dark color - highest susceptibility to landslide
• green - moderate susceptibility
• yellow - low susceptibilty
• hydrometeorogical hazards - process or phenomena of atmospheric, hydrological, or oceanographic nature
• tropical depression: up to 61 kph

  tropical storm: 62 to 88 kph

  severe tropical storm: 89 - 117 kph

  typhoon: 118 - 220 kph

  super typhoon: exceeding to 220 kph
• typhoon - large, powerful, and violent tropical clone and it is a low pressure are rotating counter-clockwise
• thunderstorm - known as electrical storm, it is characterized by heavy rain with the presence of lightning
• flood - it is the presence of excessive water on a supposedly dry land, it can be caused by continuous heavy rain or poor damage
• flash flood - a rapid flow of water on saturated soil or dry soil and it is caused by extensive rainfall
• storm surge - an abnormal rise in coastal water due to a massive force from the sea or from the air above the sea
• el nino - the phenomenon refers to the large - scale warming of the ocean and atmosphere across the central and east central equatorial pacific
• la nina - it begins in the eastern part of the pacific ocean and the sea surface temperature during this period become lower by 3-5 degree celcius
• tornadoes - belong to the major category of whirlwinds that have bigger and stronger cyclonic winds
• tornado - is a rapidly rotating column of air that is in contact with the air and land, an average of 12 - 14 tornadoes hit the country every year
• doppler radar - used to measure important weather parameters such as amount of rainfall and direction, speed, and intensity of winds
• automated rain gauge - usually installed in telecommunication cell sites to observe and locate areas with the excessive amount of rainfall