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The most vital issue dominating the watercourse history in geographic region is that the giant proportion of silt carried by its rivers. it's the silt that has created the land and created it liveable by building it up through the centuries. it's silt that is fertilising the land, however the silt, that has been the foremost useful gift of nature, has conjointly made most of the watercourse issues currently braving the individuals of geographic region. Silt deposited within the recent watercourse channel beds has forced them to vary course, making issues for abandoned areas whereas aiding in developing new areas.
The main volume of water from the river began flowing through the Padma channel within the sixteenth century. Silt from the Padma helped in increase the southern portion of north geographic region. this can be the foremost plausible rationalization for the existence of a depression around Chalan Beel. The Teesta was active within the region till it modified its course in 1787. This territory lies in between the land raised within the north by the Teesta system once it absolutely was active which within the south by the Padma.
However, there's another rationalization for the creation of period of time. The Padma has been ever-changing its course over the centuries. In Ven den Brouck's map of geographic region, ready in 1660, the most channel of the Padma is shown as flowing through Faridpur-Bakharganj, however there is also a suggestion of another, presumably earlier channel. This channel runs through Rampur Boalia in Rajshahi, Chalan Beel, Dhaleswari and Buriganga before meeting the Meghna. At that point the Jamuna was just about non-existent and therefore the river wont to flow through its recent channel.
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