Formation and Dynamics of Coastal Chars in Bangladesh

Maminul Haque Sarker, J. Akter, Iffat Huque, Knut Oberhagemann, Md. Kamruzzaman Akand

Research output: Chapter in Book/Conference proceedings/Edited volumeChapterScientificpeer-review


The tide dominated Meghna estuary is characterized by a sequence of distributary channels and islands/chars. While there are a few studies on morphological processes of the Meghna estuary in general, studies on the physical processes of the islands/chars in the estuary are sparse. Close to two million people live on some of these fragile islands and chars. Given the lack of scientific literature on the formation and dynamic processes of the islands/chars, the chapter analyzes time-series historical maps and satellite images in an attempt to fill the knowledge gap. The study reconstructed the history of the Meghna estuary and islands and chars using maps and satellite images, recorded various noticeable events in the estuary and islands, and identified related drivers. Thereafter, the processes of formation of islands/chars and the time required for this in different physical environments were verified. The dynamics of the islands/char formation include the processes of erosion/accretion, increase/decrease in size, changes in shape, and migration of islands/chars.
Original languageEnglish
Title of host publicationLiving on the Edge
Subtitle of host publicationChar Dwellers in Bangladesh
EditorsMohammad Zaman, Mustafa Alam
Number of pages26
ISBN (Electronic)978-3-030-73591-4
ISBN (Print)978-3-030-73591-3
Publication statusPublished - 2021
Externally publishedYes

Publication series

NameSpringer Geography
ISSN (Print)2194-315X
ISSN (Electronic)2194-3168


  • Delta tide
  • Island/Chars
  • Meghna estuary
  • Satellite images
  • Time-series historical maps


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