Natural Hazards: Tropical Storms

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  • Tropical Stroms
    • The 3 different types
      • Cyclone- A system of winds rotating inwards towards an area of low pressure
      • Hurricane- a violent tropical storm in the Caribbean region
      • Typhoon- a violent tropical storm over the indian and pacific oceans
      • How are these created?
        • Fast-rising warm air creates an area of very low pressure - the eye- which sucks in air.
          • The rotating winds cause low pressure close to the equator and absorb moisture from the oceans creating hurricanes, cyclones and typhoons.
    • What are the conditions for tropical storms?
      • Ocean temperatures must exceed 27 and the water needs to be 60m deep
      • Wind speeds are usually 74mph. Typically 700km in diameter and can exceed 13km in height
    • What is a tropical storm?
      • A large depression or cyclone that forms over tropical oceans and moves away from the equator.
    • How do tropical storms affect people.
      • When tropical reach land they cause 1.damage to buildings 2.Flooding caused by heavy rainfall.
        • MEDC
          • They have technology like weather satellites to monitor storms.
          • Well-equipped infrastructure to deal with storms when they strike.
        • LEDC
          • People do not have the means to travel inland like people in MEDC's which have: emergency procedures, robust transport, resources and food supplies.
    • How can people be saved from the impacts of tropical storms?
      • Disaster aid
        • Set up relief camps to provide food, water and shelter in the immediate aftermath of a storm
      • Promote individual responsibility
        • Inform people on insurance
        • Educate people so they know what to do if a storm happens.
        • Offer low costing loans to help people strengthen their properties to make them more resistant.
      • Hazard-resistant design
        • Build embankments or levees around settlements so storm surges are less likely to flood areas.
        • Strengthen houses and roofs so they are damaged during the high winds.
        • Build houses on stilts so they are less likely to flood.
        • Improve sanitation so there is less of a chance of sewage leaking into drinking water.
        • Build better roads so that evacuation is easier and effective
        • Strengthen and raise banks of rivers so increased precipitation will not lead to flooding.
        • Build sea walls to protect densely populated areas.
      • Warning and forecasting
        • Improve weather stations to allow a more accurate warning of storms.
        • Improve land use planning.
        • Plant shelter belts of trees to along the coast that will shield homes from strong winds
        • Zone land use so houses are not close to the coast


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