1. Disappearing seasons of Bangladesh
There are six seasons in Bangladesh which are disappearing due to climate change. Summer & rainy seasons are prolonging, whereas winter season is shrinking. Autumn and Dewy seasons are vanishing. Spring season has already been vanished.

2. Infrastructures
In Bangladesh, 93 disasters have occurred over the period from 1991 to 2000 and incurred the loss of US$ 590 crore in agriculture and infrastructure sectors.

3. Saline water intrusion
About 830,000 ha cultivable land has damaged by saline water intrusion from Bay of Bengal.

4. River bank erosions
Near about 106,300 ha river bank has eroded over the period from 1982 to 1992 due to climate change induced hazards especially floods.

5. Drought/too little water during the dry season
About 21.8 tones of rice damaged due to drought over the period from 1973 to 1987.

6. Floods/too much water during monsoon
Rice, about 23.8 lack tones has damaged due to flood over the period from 1973 to 1987.

Future Projection of Climate Change Impacts in Bangladesh

1. Crop production & food security
Rainfall patterns are changed due to climate change – crops yields are expected to drop significantly. Crop production will decrease 30% in 2100. Production of rice & wheat will reduce 8.8%, and 32% within 2050 respectively.

2. Salinity
There are 13% areas are salinity at Bagerhat, Khulna & Sathkhira, the southwestern coastal districts of Bangladesh at present which will increase 16% in 2050 and 18% in 2100.

3. Coral bleaching
Corals are vulnerable to thermal stress. If the sea surface temperature increases 1-3° C then corals bleaching will occur frequently.

4. Mangrove forest
About 75% area of mangrove forest, Sundarban (60007 Sq. km) will submerse if the sea level will increase 45 cm. If the sea level rise 1 m then the islands of Bay of Bengal and whole Sundarban will destroy including its fauna & flora.

5. Fisheries:
• Death rate of shrimp’s fingerlings will increase if the water temperature is more than 32°C (CEGIS).
• Diseases of fish may increase.
• Carps culture may reduce due to saline water intrusion in the ponds and open water bodies.
• Production of sweet water fish will shrink and extinct if the sea level rise.

6. Health:
• More floods are contaminating water. Increasing water borne diseases such as cholera, diarrhoea etc.
• More droughts are decreasing food production. Increasing malnutrition.
• More greenhouse gases are increasing air pollution. Rising respiratory diseases.
• Rise of temperature will favor for pest and pathogen that will increase dengue, malaria, diarrhea etc.
• Injuries, disabilities, psychosocial stress and death are becoming severe for more floods, fires, droughts, heat waves & cyclones.
• High salinity in water will affect human health.

7. Climate refugee or migration
In Bangladesh every year, rivers engulf enormous agriculture fields and homesteads, makes the peoples homeless. Those who have no way to live in the locality, migrate to urban areas and live in slum with unhygienic conditions.

8. Sea level rise
If the sea level rise –
• Low-lying non-embankment coastal area may be completely inundated.
• It will increase the risk of coastal salinity.
• Scarcity of saline free drinking water will increase highly.
• Current agricultural practices will change.

9. Increased evaporation:
Global average water vapor concentration and precipitation are projected to increase during the 21st century.

10. Biodiversity
If the global temperature rises by 2° Centigrade, 30% of all land species will be threatened by an increased risk of extinction.


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