Climatic impact on land type
Shishir Reza :
Most of the cultivable lands in Bangladesh are subject to annual inundation. The time of flooding, depth, duration of flooding and rate of rise largely determine the choice and timing of crops. Master Plan Organization (MPO) classified the agricultural land resources into five types on the basis of flood depth and cropping pattern. Assessment of impact on land type will determine the change on agricultural yield since it is associated with cropping pattern. Land type has been assessed for each district due to climate change using the model results that have been generated increasing the precipitation over the entire catchment on average and moderate flood events.
Our country is flooded every year, and agriculture systems to large extent have been adapted to this normal flooding. During the monsoon 2012-2017, the flood was not severe one; duration was short in the north (along the Brahmaputra-Jamuna River) and short to moderate in the part of north east. Duration of flooding in the south west, in the part of Satkhira and Khulna districts was prolong, due to slow drainage or very low carrying capacity of rivers, specially Haribhanga & Shibsa river system. The evaluation indicated that the accuracy of deterministic flood forecasts is around 92%, 85% and 79% for 24 hrs, 48hrs and 72 hrs respectively for the monsoon of 2012.
Bangladesh is a flood prone country and very often experiences devastating flood during monsoon that causes damage to crops and properties. The total drainage area of Ganges Brahmaputra Meghna basin is 1.75 million sq.km and the average annual water flow is 1350 billion cubic meters, which is drained through Bangladesh. If rainfall increases due to climate change in the GBM basin that will create huge water flow through the rivers of Bangladesh. Eventually the monsoon flood will be more devastating due to increase of precipitation and sea level rise that may cause more damage to crops and properties if adaptation measures are not taken.
Bangladesh is a flood prone country and very often experiences devastating flood during monsoon that causes damage to crops and properties. In normal years, about one fifth of the country is flooded. The total drainage area of Ganges Brahmaputra Meghna basin is 1.75million sq.km and the average annual water flow is 1350 billion cubic meters. If rainfall increases due to climate change in the GBM basin that will create huge water flow through the rivers of Bangladesh. Eventually the monsoon flood will be more devastating due to increase of precipitation that may cause more damage to crops and properties if adaptation measures are not taken. Bangladesh in general is subject to floods because much of the country occupies the deltaic floodplains of the Brahmaputra/Jamuna, Ganges/Padma, and Meghna Rivers, which is the second largest river system in the world.
The country with future climate change scenario will be highly susceptible to increased flooding both in terms of extent and frequency as well as increased moisture stress during dry periods leading to increase drought both in terms of intensity and frequency. Context demands to extend the adaptive capacities with land related disasters in Bangladesh.
Bangladesh is a flood prone country and very often experiences devastating flood during monsoon that causes damage to crops and properties. The total drainage area of Ganges Brahmaputra Meghna basin is 1.75 million sq.km and the average annual water flow is 1350 billion cubic meters, which is drained through Bangladesh. If rainfall increases due to climate change in the GBM basin that will create huge water flow through the rivers of Bangladesh. Eventually the monsoon flood will be more devastating due to increase of precipitation and sea level rise that may cause more damage to crops and properties if adaptation measures are not taken.
Bangladesh is a flood prone country and very often experiences devastating flood during monsoon that causes damage to crops and properties. In normal years, about one fifth of the country is flooded. The total drainage area of Ganges Brahmaputra Meghna basin is 1.75million sq.km and the average annual water flow is 1350 billion cubic meters. If rainfall increases due to climate change in the GBM basin that will create huge water flow through the rivers of Bangladesh. Eventually the monsoon flood will be more devastating due to increase of precipitation that may cause more damage to crops and properties if adaptation measures are not taken. Bangladesh in general is subject to floods because much of the country occupies the deltaic floodplains of the Brahmaputra/Jamuna, Ganges/Padma, and Meghna Rivers, which is the second largest river system in the world.
The country with future climate change scenario will be highly susceptible to increased flooding both in terms of extent and frequency as well as increased moisture stress during dry periods leading to increase drought both in terms of intensity and frequency. Context demands to extend the adaptive capacities with land related disasters in Bangladesh.
(Shishir Reza, Environmental Analyst & Associate Member, Bangladesh Economic Association)
