sundarbans 2
- Created by: erin18o
- Created on: 15-05-22 11:22
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- sundarbans
- sea level change
- eustatic change, caused by increase in sea level volume, earths temp increse. climate change, deforestation combustion.
- sundarbans is one of the fastes eroding coastlines in the world, climate change leads to worse effects and more frequent cyclones. higher storm surges more rain. more erosion of coastline
- sea level leads to loss of land, destroys villages and wildlife, loss of habitat means loss of bengal tigers. has a tiger population of 300, if the sea levels rises by 8cm, there will be 160 bengal tigers estimated, population almost halved.
- processes of sundarbans
- The mangroves of the Sundarban act as a buffer to the coast from wind, waves and storms. Without the mangrove forest, this area is more susceptible to cyclones and tsunamis.
- storms
- they absorb wave energy, reducing winds and storm surge flooding, evident during cyclone Sidr in 2007. had winds of 220km/h. and the sundarbans absorbed the main blow of the storm adn lost 30% of its plant habitat.
- cyclone Sidr, 6m tidal waves destruction, 15,000 deaths. experts say 40 years for sundarbans to regrow lost plants from Sidr.
- these waves get further in land as the low level land is being submerged.
- tsunamis
- can reach up to 100 feet in extreme (cs) cases.
- destruction of homes, wildlife, loss of life
- A tsunami against Sundarbans has potential to destroy enough mangrove forest to leave populated areas of the Sundarbans at risk from cyclones and future tsunamis, there will be a big decrease in natural protection from them.
- There is a density of 30 trees per 0.01 hectare, reducing the force of a tsunami by up to 90%, so it is vital that the mangrove forest is protected.
- erosion
- Due to sea level rise, the tidal waves are coming more and more inland, contributing to erosion in the Sundarban
- Research: 3.71% of the mangrove forest has been lost from erosion
- anthropegnic (cs) activities like fishing their boats are distrubing sediments and cause causeline to be eroded.
- mitigation
- before climate change, the mangroves provided enough protection for storms but now is not enough
- to mitigate the high risk of natural disasters, some areas have invested infrasturcture: hospitals, schools, roads.
- the local's resilence is decreasing, due to rise in poverty, and marginalization of some coastal communities. this is caused by the shrinkking of the open access to resources, degradation of ecosystems and increase in deaths by tigrers.
- wildlife
- top of food chain: bengal tiger. populations have declined in last few decades, ten years ago there were over 440, now there are just over 100. this is due to poaching. gangs wants their bones and coats.
- Shrimp: thousands sell Tiger Prawn to sell in shrimp farms, the decline in shrimp farming leads to families livelihoods lost due ot families dependde of shrimp farming.
- to combat the extensive farming, the Indian government semi-banned fish farming, all fish farming had to be done 500 metres away from the coastline and could not be in prime agricultural land.
- what is a delta?
- THE S is one of the largest mangrove forests in the world and covers 140,000 hectares. This forest lies in the delta of the Ganges, Brahmuputra and Meghna, adjoining to the Bay of Bengal.
- management
- local adapt by using salt resistant crops of attending NGO funded education programmes, however coastal management is still needed.
- not one sinlge country, communication between Inida and Bangladesh
- nothing India/bangla can do about rising sea levels, that issue is global. they are LICs and many decisions made about global warming is made by HICs
- lumber production is being limited
- possible solutions, plants more mangrove trees, so natural protection. also plant more marram grass so more sand dunes, so more of a barrier.
- future: USAID has been training communities to become resilient to future climate shock by training 30,00 people to use correct agriculture techniques.
- sea level change
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