WITH TWO PLATES
SummarySuperficial white sand, carrying a distinctive xerophytic scrub vegetation, associated with the Berbice Formation extends to depths of over 30 m. and has gradational contacts with flanking material. Discontinuous pans of humic material occur below. Shallower profiles show pronounced development of a humic B horizon overlying red sandy loam. The results suggest that the white sand was derived from sediments of a ferruginous nature with greater clay content, which supported a higher forest formation.
The southern part of Bangladesh is bounded by the Bay of Bengal. Three major river systems such as; Brahmaputra-Jamuna, Ganges-Padma and Surma-Kusiara have been developed the Ganges-Brahmaputra-Meghna (GBM) floodplain, this are 80% area of Bangladesh. These rivers carry huge sediments from upper Himalayan region during at monsoon period. On the contrary, as the costal part of Bangladesh is open to the sea, so high wave actions, strong wind flow, tidal actions are prevailing here. Consequently, coastline of this part is unstable and dynamic. Coastline change dynamics is significant for disaster management, coastal planning and environmental management. For the delineation of coastline identification, Rennell’s map (1776), Landsat MSS (1976) and Landsat OLI (2016) images have been interpreted using the tools of Remote Sensing Technology and Geographic Information System (GIS) of Geo-informatics. During 240 years from 1776 to 2016 about 3892 km2 landform have been raised in coastal area of Bangladesh.
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