$*/$ : civil engineers design efficient drainage systems for urban areas? Explore the fundamental principles underlying drainage system design, including considerations for runoff management, pipe sizing, and slope optimization. Analyze the impact of urbanization on drainage infrastructure and the challenges posed by increased impervious surfaces. Discuss innovative solutions such as green infrastructure and permeable pavements to mitigate urban runoff and minimize flood risks. Highlight real$-$world case studies showcasing successful drainage system implementations in diverse urban environments."