Developing a 3D Hydrodynamic and Water Quality Model for Floating Treatment Wetlands to Study the Flow Structure and Nutrient Removal Performance of Different Configurations

Floating treatment wetlands (FTWs) are widely used in surface water. The nutrient removal performance depends on both physical processes and chemical/biological transformations FTWs. However, research describing the coupling of hydrodynamic water quality system remains limited. Therefore, a coupled three-dimensional model for FTWs was developed based Environmental Fluid Dynamics Code (EFDC). Additional plant drag terms were added to momentum equations simulate suspended canopy effect, occurring integrated into original simultaneously. fully calibrated compare characteristics seven FTW configurations. modeling results showed that main stream would turn bottom side root zone because block differences among configurations led difference improvement effects. Segmenting single pair parallel could achieve maximum nitrogen phosphorus mass removal. study useful designing an optimal configuration