We study the evolution of the Abandoned Yellow River Delta (AYD) through a process-based morphodynamic-modelling approach. Quantify the influence of uncertainty in model setting and initial state on the morphological evolution. Simulations reproduce the AYD in good agreement with historical maps and the results of geological studies. The model improves the understanding of the mechanisms underlying the evolution of the AYD. The model provides relatively reliable suggestions on the spatial distribution of the AYD.