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Analysis of the Erosion and Accretion Dynamics of the Teesta River: Shifting Patterns from 1993 to 2023

Md. Hazrat Ali*, Md. Redwanur Rahman**, Md. Imran Hossain***, Md. Razi Uddin****, Mst. Rinu Fatema*****

*,****Directorate of Secondary and Higher Secondary, Ministry of Education, Bangladesh.

**,***Institute of Environmental Science, Rajshahi University, Bangladesh.

*****Department of Tourism and Hospitality Management, Noakhali Science and Technology University, Bangladesh.

Periodicity:July - September'2024

Abstract

The Teesta is one of the most dynamic river systems in Bangladesh. This study aims to investigate the erosion and accretion processes along the Teesta River in Bangladesh within a designated reach from 1993 to 2023. The bank line migration was delineated using Landsat TM and OLI satellite images taken in 1993, 2003, 2013, and 2023 with a resolution of 30 meters and WRS_PATH, WRS_ROW 138,042. Water level analysis was conducted using the hydrological water level data (1993-2023) obtained from the Bangladesh Water Development Board (BWDB). The spatial movement of the river bank line was examined using remote sensing (RS) and geographical information system (GIS) techniques. The trend analysis of the hydrological parameters was conducted using exploratory data analysis techniques. In contrast, various ArcGIS and Microsoft Excel tools were used to estimate the accretion and erosion area of Laimonirhat from satellite images. The findings indicate that erosion and accretion processes are significantly impacted by variations in water levels. These procedures show how channel shifting is dynamic and responds to changes in the bank line. Depending on the degree of accretion and erosion at various cross-sections, the river may narrow or occasionally enlarge. The results show that accretion and erosion took place every year, changing the river area and the migration of the river channels.

Keywords

Erosion, Accretion, Remote Sensing (RS), Geographic Information System (GIS), Teesta River, Laimonirhat.

How to Cite this Article?

Ali, M. H., Rahman, M. R., Hossain, M. I., Uddin, M. R., & Fatema, M. R. (2024). Analysis of the Erosion and Accretion Dynamics of the Teesta River: Shifting Patterns from 1993 to 2023. i-manager's Journal on Structural Engineering, 13(2), 25-34.

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Analysis of the Erosion and Accretion Dynamics of the Teesta River: Shifting Patterns from 1993 to 2023

Abstract

Keywords

How to Cite this Article?

References

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