## 3 Results and Discussion  
The formation of a channel, particularly in huge basins, might exhibit transitional characteristics. Frequently densely inhabited areas are discovered to be drained by tropical rivers. For instance, the Yangtze Basin is home to one of the world's greatest populations, while on the other side, the Ganges-Brahmaputra Basin has the highest population density with a chaotic urban environment [23], growth, and a high water demand. Among the  
Figure 3: A flowchart of the methodology. Figure 2: Satellite images that have been used to calculate the sinuosity ratio and braiding index. many tropical rivers in the globe, the Amazon ranks first. Due to the monsoon season's high discharge, the Asian rivers are susceptible to flooding. The rivers of Asia support a large population and are a major source of water for irrigation, household, and industrial use. Nonetheless, the floods of these rivers' features and the resulting bank erosion are responsible for the loss of life and property on fertile agricultural land. Human interference through the construction of dams and barrages frequently has negative effects on river systems, leading to deterioration and flooding. Degradation in particular stretches and alters the river's natural environment as a result of alterations in sediment and nutrient supply [24]. Sinuosity is one of the most essential qualities of a river channel pattern. Sinuosity is determined as the ratio of stream length along the curve centre of the canal to the length of the valley. When a river's sinuosity is more than 1.5, then the river cannot be navigable, is no longer deemed straight and ought to be categorised as meandering. Clearly, the sinuosity has grown more pronounced with time (Table 2). From a low of 1.31 in 1973, it has risen to a high of 1.47 in 2016. Table 2 shows that the value was close to 1.5 in 2006 and 2016, indicating a shift towards meandering river behaviour. Meander migration is the alteration of the planform of a river. Actively wandering rivers adapt their planform in response to changes in discharge, sediment load, channel morphology, and bank material characteristics. The water from the upstream section of a river is diverted to its outside curve. A river meanders due to centrifugal force, resulting in an abnormally high water level. This causes the outer bank to erode and transfers debris to the inner bend. Theoretically, the greatest erosion will occur just downstream of the apex, resulting in the highest sediment loss. The direct translation of the meander bend is down valley. Four migration theories for a meander have been identified: translation, rotation, extension, and a combination of the three. Extension refers to the growth of the meanders, whilst translation refers to their movement and illustrates the meander bends' movement [25]. The geometry of the channel is a critical component in determining the migration rate. Furthermore, the radius of curvature has an effect on meander migration. The ratio of the radius of curvature to the width of a channel determines the tightness or curvature of a curve. The migration rate depends on the curve. It has been discovered that a bend curvature ratio of 2.0 to 3.0 improves the rate of migration in temperate rivers. Several models on meander migration have been developed based on the principles of fundamental physics and probability, which demonstrated that numerous bend shapes and sizes can evolve, including meander migration in particular, because of their effect on channel slope, in addition to sedimentation and storage [23, 24, 25, 26]. Remote sensing is a valuable data source for assessing the physical characteristics of natural river systems throughout time. However, observed remote sensing images are contingent on a variety of factors, some of which are connected to the scene of interest and others unrelated, such as atmospheric influences, sensor qualities, framework (e.g., spatial resolution), and sampling methodologies. It is imperative to govern these confusing circumstances.