Research on the relationship between river hydraulics, sediment and bed morphology in creek in the Mekong delta

Abstract

     Braided river is often unstable and in conflict with each other according to the development trend or degradation dependimg on the flow regime and sediment division of each branch. The creek with little sediment but high capacity of sediment transport will continue its flow; on the contrary, creek with high sediment but low capacity of sediment transport will gradually be filled up and decay. Flow, sediment and bed morphology characteristics in the region of flow separation play an important role in ratio of water and sand distribution into the creek. This article introduces several research results on the relationship between river hydraulics, sediment and bed morphology in the creek through the analysis of observed data in some typical creeks in the Mekong river system.