👉 The metropolitan fluid, also known as the urban fluid, is a theoretical model in urban hydrology that describes the complex and dynamic flow of water within a metropolitan area. It encompasses various interconnected components such as stormwater drainage systems, sewer networks, and surface water bodies, all influenced by the unique characteristics of urban environments like impervious surfaces, dense infrastructure, and human activities. This fluid model accounts for the rapid and often unpredictable movement of water during rainfall events, including infiltration, runoff, and overflows, highlighting the challenges in managing urban water cycles. By simulating these processes, the metropolitan fluid helps urban planners and engineers design more efficient and resilient water management systems to mitigate flooding, improve water quality, and enhance overall urban sustainability.