River deltas are dynamic depositional landforms formed by the coordination of fluvial and marine processes (Wright & Coleman, 1973). More than half a billion people live on or near deltas because these regions are biodiverse, with highly productive and fertile lands (Syvitski et al., 2009). Changes in the shape of deltas can affect humans directly. Therefore, informed decision-making about coastal and river management requires the understanding of natural processes that control delta formation and evolution. Although the influence of diverse natural processes (e.g., waves, tides, rivers) on delta morphology has long been discussed (A. D.