Physical and human geography

PHYSICAL AND HUMAN GEOGRAPHY

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.

NATURAL HAZARD

RAPID INCREASE IN POPULATIONURBANISATION (Including shanty towns)CHANGING LAND USE IN RURAL AREASNUMBER OF PEOPLE IN POVERTYCHANGING NATURAL ENVIRONMENT

TECTONIC HAZARDS CAUSED BY PLATE MOVEMENT

TROPICAL STORMS

WINDS, FLOODS AND STORM SURGES. HURRICANES ARE KNOWN AS TROPICAL CYCLONES.

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

TROPICAL STORMS

FLOODS

RESULT OF TROPICAL STORMSCONTINUOS RAIN LOCATION OF SETTLEMENTCOASTAL FLOODING. HIGH TIDAL RANGE.

FLOODS

BANGLADESH

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

FLOODS IN BANGLADESH

FLOODS IN BANGLADESH

FLOODS IN BANGLADESH

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

DROUGHT

RAINFOREST OPPORTUNITIES:

FARMINGHYDRO-ELECTRIC POWERTOURISMFISHINGMINERAL DEVELOPMENT

RAINFOREST

RAINFOREST

RAINFOREST

RAINFOREST

HAZARDS:SURFACE EROSIONSANDIFICATIONCLIMATIC CHANGELOSS OF BIODIVERSITY

DESERTS

DESERTS HAZARDS:

WEATHERINGFLOODINGEROSIONLANDSLIDES AND ROCKFALLSDUST STORMS

DESERTS