A novel approach to model dynamic flow interactions between storm sewer system and overland surface for different land covers in urban areas

摘要: In this study, we developed a novel approach to simulate dynamic flow interactions between storm sewers and overland surface for different land covers in urban areas. The proposed couples the one-dimensional (1D) sewer model (SFM) two-dimensional (2D) (OFM) with techniques depending on cover type of study For roads, pavements, plazas, so forth where rainfall becomes runoff before entering system, rainfall–runoff process is simulated directly 2D OFM, drained network via inlets, which regarded as input 1D SFM. green areas falls into permeable ground generated direct traverses terrain, deduction rate applied reflecting soil infiltration OFM. flat building roofs drainage facilities allowing drain from roof networks, using hydrological module SFM no these used hydraulic simulations network. Where exceeds its capacity, surcharge occurs water may spill onto if pressure head manhole elevation. overflow discharge system calculated by considered point source will return when it reaches an inlet that connects un-surcharged manhole. case, sink OFM inflow was compared other five flood modelling four events had previously recorded inundation merits drawbacks each technique were discussed. Based results, found floodings closer survey records than approaches because physical phenomena environment better reflected.