—The Ganges-Brahmaputra-Meghna delta is one of
the most dynamic tide dominated deltas in the world, a
dynamism forced in part by the huge flows and sediments
generated in the catchments of the GBM basins. In this study,
we apply 1D and 2D dynamic models (HEC RAS and Delft 3D)
to analyze the volumetric flow distribution in these estuarine
systems. The flow distribution parameters are then used as
proxy variables to study the sediment transport mechanism in
the region. Flow distribution patterns show that freshwater
input and storage are much higher than the saltwater input and
storage. Considering freshwater contribution, eastern estuarine
system plays important role during monsoon whereas, during
dry season it is central estuarine system. Western estuarine
system mainly contributes to store saline water. The Lower
Meghna estuary is the main flow and sediment carrying channel
in the region. Clock-wise estuarine circulation makes the
sediments to re-enter from the sea into central estuarine system,
forms flocks in the saline environment, and cause sedimentation.
—1D and 2D models, estuarine circulation,
Ganges-Brahmaputra-Meghna delta, sediment transport.
The authors are with the Institute of Water and Flood Management
(IWFM), Bangladesh University of Engineering and Technology (BUET),
Dhaka-1000, Bangladesh (e-mail: firstname.lastname@example.org,
Cite: Anisul Haque, Sumaiya, and Munsur Rahman, "Flow Distribution and Sediment Transport Mechanism in the Estuarine Systems of Ganges-Brahmaputra-Meghna Delta," International Journal of Environmental Science and Development vol. 7, no. 1, pp. 22-30, 2016.