<p>The increasing demand for freshwater has led to a proliferation of dams worldwide. Dams alter flow dynamics by reducing freshwater and sediment flow, which increases tidal influence in estuarine areas and significantly impacts downstream morpho-dynamics. Understanding the long-term impacts of dam construction on shorelines is crucial as changes in shoreline evolution can have significant ecological, economic, and social implications. This study introduces a new hybrid framework combining Range of Variability Analysis (RVA), hydrologic modeling for sediment trapping, hydrodynamic modeling of estuaries, and digital shoreline analysis to explore shoreline changes caused by large dams. To illustrate the proposed methodology, it is applied to the Narmada River estuary in central India to study the impacts Sardar Sarovar Dam (SSD). Before the construction of the SSD, the estuarine northern shoreline was accretive, and the southern shoreline was erosive in nature. The construction of SSD reduced flood magnitude by over 40% and sediment flow by 90%, resulting in significant decreases in accretion extent (35%) and rate of accretion (49%) on the northern shoreline. On the southern shoreline, erosion extent increased and there was a shift from accretion to erosion zones, despite a marginal 18% reduction in the maximum erosion and the erosion rate. The analysis using the hybrid approach shows that the reduced rate of shoreline change is primarily caused by a decrease in monsoonal flow, while the increased extent of erodible areas is directly associated with a reduction in sediment transport.</p>