Physical and human geography
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Transcript of Physical and human geography
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PHYSICAL AND HUMAN GEOGRAPHY
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NATURAL HAZARDS
CHALLENGES FOR HUMAN ACTIVITIES.NATURAL HAZARD IS A NATURAL EVENT THAT CAUSES DAMAGE TO PROPERTY, DISRUPTION TO NORMAL LIFE AND MAY CAUSE LOSS OF LIFE.
CAUSED BY IMPACT OF NATURAL EVENTS ON SOCIAL AND ECONOMIC DEVELOPMENT.
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NATURAL HAZARD
RAPID INCREASE IN POPULATIONURBANISATION (Including shanty towns)CHANGING LAND USE IN RURAL AREASNUMBER OF PEOPLE IN POVERTYCHANGING NATURAL ENVIRONMENT
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TECTONIC HAZARDS CAUSED BY PLATE MOVEMENT
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TROPICAL STORMS
WINDS, FLOODS AND STORM SURGES. HURRICANES ARE KNOWN AS TROPICAL CYCLONES.
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TROPICAL STORMS
Tropical cyclones are like giant engines that use warm, moist air as fuel. That is why they form only over warm ocean waters near the equator. The warm, moist air over the ocean rises upward from near the surface. Because this air moves up and away from the surface, there is less air left near the surface.
Air from surrounding areas with higher air pressure pushes in to the low pressure area. Then that "new" air becomes warm and moist and rises, too. As the warm air continues to rise, the surrounding air swirls in to take its place. As the warmed, moist air rises and cools off, the water in the air forms clouds. The whole system of clouds and wind spins and grows, fed by the ocean's heat and water evaporating from the surface
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TROPICAL STORMS
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FLOODS
RESULT OF TROPICAL STORMSCONTINUOS RAIN LOCATION OF SETTLEMENTCOASTAL FLOODING. HIGH TIDAL RANGE.
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FLOODS
BANGLADESH
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FLOODS IN BANGLADESH
3 LARGE RIVERS:GANGES, BRAHMAPUTRA AND MEGHNA.MONSOON RAINSAVERAGE OF 16 CYCLONES PER YEAR80% OF POPULATION LIVE IN RURAL AREASHIGHEST RAINFALL TOTALS IN THE WORLDPOPULATION GROWTH AND RURAL IMPOVERISHMENT
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FLOODS IN BANGLADESH
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FLOODS IN BANGLADESH
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FLOODS IN BANGLADESH
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DROUGHT EXTENDED PERIOD OF DRY WEATHER LEADING TO CONDITIONS OF
EXTREME DRYNESS. ABSOLUT DROUGHT: 15 CONSECUTIVE DAYS WITH LESS THAN 0.2
MM OF RAINFALL. PARTIAL DROUGHT: 29 CONSECUTIVE DAYS WHERE AVERAGE DAILY
RAINFALL DOES NOT EXCEED 0.2 MM. FOREST FIRES FOOD SHORTAGES
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DROUGHT
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RAINFOREST OPPORTUNITIES:
FARMINGHYDRO-ELECTRIC POWERTOURISMFISHINGMINERAL DEVELOPMENT
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RAINFOREST
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RAINFOREST
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RAINFOREST
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RAINFOREST
HAZARDS:SURFACE EROSIONSANDIFICATIONCLIMATIC CHANGELOSS OF BIODIVERSITY
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DESERTS HAZARDS:
WEATHERINGFLOODINGEROSIONLANDSLIDES AND ROCKFALLSDUST STORMS
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DESERTS
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