83 / 2024-01-02 10:46:08

Advancing Urban Flood Modeling: A Comparative Analysis of 3D Computational Simulations and 2D SWE Approaches for Flow Dynamics and Pollutant Transport

urban flood,3D simulations,pollution transport,flood dynamics

    Urban flood modeling has always been a complex endeavor due to the intricate flow paths and dynamic pollutant behavior within urban environments. While 2D SWE models have provided valuable insights, they may not encapsulate the full three-dimensional intricacies, especially concerning pollutant dispersion. This research aims to enhance the understanding of urban flood dynamics by introducing 3D computational simulations. Building upon previous investigations that primarily focused on 2D shallow water equations (SWE) for urban flood modeling, our study aims to determine the performance of 3D simulations in capturing intricate flow patterns and pollutant transport within urban environments.

    To achieve our objective, we conducted 3D simulations to replicate urban flood processes, drawing comparisons with earlier 2D modeling results and experimental observations. Current study comprised two groups, totaling 13 architectural models (one group with 8 models and the other with 5 models). These models feature varying numbers or positions of openings on their exterior walls to represent architectural elements such as doors and windows that could allow floodwaters to enter in real-world scenarios. Moreover, by introducing a pollutant distribution component, our methodology incorporates both flow dynamics and pollutant transport in three-dimensional urban environments. The simulations were executed considering various urban layouts, flow conditions, and pollutant release scenarios to ensure a robust evaluation. Preliminary findings indicate that 3D simulations offer enhanced accuracy in capturing intricate flow patterns within urban settings compared to their 2D counterparts. Specifically, the 3D model elucidated more nuanced flow paths and recirculation zones. Pollutant dispersion patterns under various urban synthetic patterns is furtherly investigated by the 3D computational model to shed light on pollutant contaminant behaviors during flooding events.

    As urban areas grapple with escalating flood risks and environmental concerns, harnessing advanced 3D simulation techniques is paramount. Our research not only bridges existing knowledge gaps but also provides crucial insights for informed decision-making and fostering sustainable urban planning strategies.