Charland Dynamics of the Brahmaputra-Jamuna River in Bangladesh (original) (raw)

2016

Abstract

Abstract: This study presents the spatial and temporal dynamics of alluvial char using the LANDSAT TM Satellite image of the Brahmaputra-Jamuna River in Bangladesh. The Explanatory Data Analysis and Geo-statistical techniques have used to analyze, interprete and visualize the data. The results show that every year the charland shifts due to multi-channel river flow and braided characteristics of the Brahmaputra-Jamuna River. The highest charlands accumulation area is measured 20.683 sqkm including sandy char, settlements, agriculture and vegetation cover in 2004, and lowest 13.463 sqkm in 1983. The total area of sandy chars have been increasing science 1973 which occupies 43.478 sqkm and settlements, agriculture and vegetation cover and also takingtotal area 38.47 sqkm in 2014; while water bodies decrease 36.478 sqkm. due to the sedimentaccumulation in Brahmaputra river. Every year charlands are shifting respectively. The local topography, flood, erosion, and sedimentation into the river bed are main causes of charlands shifting. Charland shifting is important phenomenon for braided river and development of the charlands people livelihood. The charlands shifting in the Brahmaputra River causes a severe damage to the agriculture, settlement and vegetation cover on stable chars. Charlands people play important role in our national life and our national progress is not possible without advancement of the charlands. It requires a long term strategy, with a view to the monitoring the charland shifting for the better development of the charlands people livelihood in Bangladesh. It has been argued that further in depth numerical model based study need to carry out for wider implication of Charland shifting phenomenon.

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