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Climate Change in Coastal Region of Bangladesh

Climate Change in Coastal Region of Bangladesh. Presented By A.H.M Rezaul Haq. What is Global Worming.

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Climate Change in Coastal Region of Bangladesh

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  1. Climate Change in Coastal Region of Bangladesh Presented By A.H.M RezaulHaq

  2. What is Global Worming An increase in global temperature will cause sea level to rise and will change the amount and pattern of precipitation, and a probable expansion of subtropical deserts. Warming is expected to be strongest in Arctic and would be associated with continuing retreat of glaciers, permafrost and sea ice. Other likely effects of the warming include more frequent occurrence of extreme weather events including heat waves, droughts and heavy rainfall events, species extinctions due to shifting temperature regimes, and changes in crop yields. Warming and related changes will vary from region to region around the globe, with projections being more robust in some areas than others

  3. What is Climate Change Climate includes patterns of temperature, precipitation, humidity, wind and seasons. "Climate change" affects more than just a change in the weather, it refers to seasonal changes over a long period of time. These climate patterns play a fundamental role in shaping natural ecosystems, and the human economies and cultures that depend on them. Because so many systems are tied to climate, a change in climate can affect many related aspects of where and how people, plants and animals live, such as food production, availability and use of water, and health risks.

  4. Climate change Bangladesh context • Draught period is extending and erratic rainfall monsoon period compress and shifting. (we have now four season instead of six season) • Frequency and intensity of flood/flash flood is mounting. • River siltation and river erosion unusually proliferate • Salinity in the coast and in estuaries intruding toward upstream • Tidal surge intensity and frequency is rising • Unusual rainfall and water-logged areas is increasing. • Salinization increasing

  5. Impact of CC on specific location depends Environmental Backlash X Climate change = Impact Climate Change INFRASTRUCTURE DEV Impact • Wetland degradation • Water diversion in upstream • Dying of River or river siltation • Mangrove/ Forest destruction Impact Population Growth Impact CC Driver Economic Growth Impact Climate Change Impact

  6. Coastal ecosystem In Bangladesh and it types: Fully Connected with GBM Fresh water round the year Have a link with upstream Seasonal-saline Tidal river Saline Water Non delta

  7. 1963-Physical Situation of Sea Level and Ground Level

  8. 37 Polders = Areas covers 3 million Acres • 2 million was inundated with one miter dept water that is by volume 120 million cubic miter. • River and cannels cover 15% of total areas of which 50% inside polder.

  9. Comparison of Water flow Before Polder Water flow from sea River Water + Wetland Area: 2 millions Acre Tidal Volume 120cubic meter Slope Nolian Forest After Polder

  10. Impacts On Coastal Area Overflow of Embankments and Breaching. 2. Intrusion of Saline water in upstream 3. Increasing Water Logging 4. Increasing Salinization for increasing of Draught 5. Scarcity for availability of Freshwater 6. Siltation inside Sundarban, A threat for the forest 7. Aggressive Sea Current

  11. TRM at ‘Aila’ affected area: Gabura BeelVina TRM Daly 4333 cm silt was deposited in 400 hectare of BeelVaina 4years I month 10 days = 6.5 million cm silt deposited in Vaina basin

  12. Expanding waterlogged area per year is 5070 hac.This are all fresh water waterlogged areas: Source (WRDS and Pani Committee)

  13. Increase in Salinity with time series in the South West Region

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