A methodology for linking 2D overland flow models with the sewer network model SWMM 5.1 based on dynamic link...

Area of Science:

• Environmental Engineering
• Hydrology
• Computational Fluid Dynamics

Background:

• Urban pluvial flooding results from sewer manhole surcharge, necessitating models that simulate sewer-overland flow interactions.
• Accurate prediction of urban flood inundation extents requires integrated modeling of sewer networks and surface runoff.

Purpose of the Study:

• To present a novel methodology for coupling 2D overland flow models with the Storm Water Management Model (SWMM 5).
• To enable bi-directional simulation of sewer network and overland flow interactions within urban flood models.
• To develop a method that integrates with SWMM 5 without altering its original code.

Main Methods:

• Developed a methodology within a dynamic link library (DLL) in C++ for SWMM 5.
• Implemented bi-directional interaction simulation between the sewer model (SWMM 5) and 2D overland flow models.
• Validated the methodology using a real-world case study with an existing coupled urban flood model.

Main Results:

• Successfully created a methodology for linking 2D overland flow models with SWMM 5.
• Demonstrated the ability to simulate bi-directional interactions between sewer surcharge and overland flow.
• Validated the coupled model's performance in a real-world urban flooding scenario.

Conclusions:

• The new methodology allows for enhanced urban flood prediction by accurately simulating sewer-overland flow interactions.
• The approach is modular, enabling its addition to SWMM 5 without code modification, and applicable to other overland flow models.
• This work provides a significant advancement for urban flood modeling, improving the accuracy and applicability of SWMM 5 in coupled simulations.