Advances in biogenic elements transport at the interface of stream-streambed and water environmental control in the plain river

As an important factor affecting water quality,the migration and transformation of biogenic elements in rivers have attracted much attention. The process of mass exchange at the water-sediment interface is affected by many environmental and hydrodynamic factors,and it is extremely complex,which not only affects the flux of river biogenic elements but also relates to the water environment. In order to explore the migration and transformation process and mechanism of biogenic elements at the water-sediment interface,this paper summarizes the micro-interface mechanism of sediment particles and biogenic elements,the migration and transformation of biogenic elements at the water-sediment interface and the influence of flow conditions on sediment adsorption/desorption of biogenic elements. The water quality model of the river and the water environment regulation model are described under the condition of sluice and dam pumps. Finally,the influences of sediment transport on the transport of biogenic elements and water environmental regulation is pointed out in plain rivers. Furthermore,future research directions are also outlined.