Bangladesh, a predominantly riverine country, is characterized by a complex network of approximately 405 rivers, including 57 transboundary waterways. The Teesta, one of the country's major transboundary rivers, traverses 115 kilometers of its total 315-kilometer length within Bangladesh, significantly impacting the livelihoods of its riparian populations. To address irrigation demands, a barrage was constructed across the Teesta River in 1998. This study investigates the morphological alterations induced by the Teesta Barrage on the river's dynamics, specifically focusing on bar formation, sinuosity index, and river width. Employing Landsat satellite imagery from 1988 to 2020 and GIS analysis, the research reveals a substantial increase in bar area post-barrage construction. While the maximum sinuosity index has risen, the minimum and average values have declined, indicative of altered channel patterns. Concurrently, the river's width has expanded, with an increasing disparity between its maximum and minimum dimensions, signifying heightened channel dynamism. These findings underscore the adverse impacts of the Teesta Barrage on the river's morphology. Consequently, comprehensive studies on the river's morphological evolution are imperative to develop effective mitigation strategies for the affected communities.

Teesta River, Teesta Barrage, GIS, remote sensing, morphology, bar dynamics, sinuosity