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- W4382045480 abstract "Morphology of the alluvial river changes from time to time due to the natural autogenic processes. Confluence of two alluvial rivers is very sensitive and is more prone to change in its morphology. Formation of fluvial island is an integral part of sediment transfer process to maintain equilibrium. Change in planform, formation of fluvial islands and sandbars, and sinuosity are intensified at the confluence of rivers, which carry heavy sediment load. In present study, temporal changes in morphology of river at confluence zone of river Ganga and Kosi have been investigated using Landsat data from the year 2000 to 2020 at the interval of 5 years. Planform and fluvial islands have been mapped by Normalized Difference Water Index (NDWI) and classification of the satellite image. Accuracy assessment was performed to ensure mapping accuracy. Change in planform and morphological parameters (Sinuosity Index (SI), Braiding Index (BI), and River Network Change Index (RNCI)) has been computed and analyzed. Study reveals that the planform and courses of braided channels have been changed frequently in due course of time. The confluence point has been shifted by 1.5 km toward the left bank. SI has an increasing trend during study period, and it shows meandering at the confluence. BI has also been changed without any specific trend. RNCI shows that the amount of total erosion is almost equal to total deposition in study reach. However, both erosion as well as deposition was more on its left bank side compared to right bank side. The fluvial island at confluence of two highly sediment-loaded rivers is sensitive to spatial change. Monitoring of change in morphology may provide a useful reference for decision-making of flood warning to human settlements present on river island and nearby banks." @default.
- W4382045480 created "2023-06-27" @default.
- W4382045480 creator A5039612264 @default.
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- W4382045480 date "2023-01-01" @default.
- W4382045480 modified "2023-09-24" @default.
- W4382045480 title "Study of Morphological Changes of River Ganga at the Confluence of River Kosi" @default.
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- W4382045480 doi "https://doi.org/10.1007/978-981-19-9151-6_22" @default.
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