Morphological Landscape Mapping of the Bhagirathi Flood Plains in West Bengal, India, Using Geospatial Technology
2022; Springer International Publishing; Linguagem: Inglês
10.1007/978-3-030-79634-1_24
ISSN2366-8865
AutoresIsmail Mondal, Jatisankar Bandyopadhyay,
Tópico(s)Groundwater and Watershed Analysis
ResumoThe Bhagirathi, Mathabhanga-Churni, and Ichamati rivers in West Bengal are characterized by frequent riverbank erosion and planform changes along with their courses. This study examines the morphodynamic changes of river Bhagirathi, Churni, Mathabhanga, and Ichamati considering the relationship between land use and land coverLand-use and Land-cover and geomorphology during the last 43 years' time span using geospatialGeospatial technology. The result shows a remarkable change in bank lineBank lines positions and their geometry over time. The result also portrays that the bank line is unstable and subject to migration incessantly. The degree of sinuosity increases from its previous river course (1970) to the present course for all rivers, with an abnormal nature. Besides, the study also found that among the river channels under consideration, the Bhagirathi RiverBhagirathi River is drastically changing the aspects and shifted to the river course toward the east. Also, river channels are subjected to excessive meandering and migration owing to various natural and anthropogenic phenomena including LULC changesLULC changes along with the river courses. The outcome of this study obtained from processing satellite imagery and Survey of India (SoI) Toposheets is helpful to comprehend the channel planformChannel planform dynamics and to formulate policy recommendations for future development works.
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