## 1 Introduction  
Banglades is a predominantly riverine nation. Bangladesh is primarily watered by the Padma, Meghna, Jamuna, and Brahamaputra rivers (Figure 1). The country is also crisscrossed with rivers of varying sizes. Bangladesh is home to three important river systems, one of which is the Ganges-Padma. From its beginning in the Himalayas in Nepal to where it meets the Jamuna in Bangladesh is a distance of about 2200 km. Here, we speak to the section of the Ganges River that flows from below the Farakka Barrage to where it meets the Jamuna at Aricha. This section of the Padma River is well known to locals. Both the hydrology and the morphology of the Padma's upper and lower reaches are very different from one another. From the Farakka Barrage to Aricha is the upstream section. The confluence of the Padma and the Jamuna may be seen in the downstream reach from Aricha to Chandpur. As the Brahmaputra River's primary course shifted towards the Jamuna River, the Padma River's platform began to change as a result of the massive silt and additional flow [1, 2]. For much of the Ganges delta, the silt is discharged via its network of distributaries. Geologically, the Ganges-Padma Basin is considered a subregion of the Indo Ganges Brahmaputra lowlands. The Ganga River is characterised by course changes throughout documented history. Before entering the Bay of Bengal, the coastline extends into the sea. River banks are susceptible to erosion causing their planform to alter with excessive discharge. The Bengal Plain is located at the intersection of the plate of India, plate of Eurasia, and plate of Myanmar. The plate margins are converging, producing the Indian and Burmese arcs. Approximately 328 million tonnes per year of the total suspended sediment observed at Farakka is sand and gravel. The sediments are composed of extremely fine sand and silt-clay particles [2]. The environmental implications of the Jamuna River's rising importance are substantial in comparison to those of the Padma River. The Jamuna's significant sediment transport caused the Padma to gradually transform into a braided river. Braided river depositional models are essential for providing an objective basis for interpreting geological evidence from the past and for aiding in the characterisation of subsurface deposits. Since braiding is such a dynamic process, it is currently difficult to anticipate its future even on relatively short time spans. There is a need for more detailed information about the processes of channel bifurcations, which are generally agreed upon as being crucial to the initiation of braiding, in order to advance our knowledge and ability to model braided rivers. Bank erosion is closely linked to the formation and movement of meander bends on the Ganges, which is primarily a meandering river. Because each of the Jamuna's braided channels functions as a meandering channel, researchers have previously used a method for forecasting bank erosion in meander bends to analyse erosion along the river's length [2,3]. Rivers are a growingly significant and ever-changing component of our physical landscape. Many different issues, from flood prevention and navigation to water resource management and recreational use, are connected to their behaviour. Rivers carry the water and material they are fed from the land to the sea, effectively acting as agents of erosion and transport. Rivers typically take the form of channels. This is the outline of a canal on the ground, as seen in aerial views or depicted on a map. From above, the river's channel layout can look like meanders, braids, or be very straight [4]. Woven and meandering designs are common. For example, we can talk about a stream's meandering habit or its braided habit to describe its patterning. We have used the relationship between channel length and down valley distance as our defining factor.