Task :$-67$ What factors should civil engineers consider when designing a sustainable urban drainage system for a rapidly growing city? How can these systems effectively manage stormwater runoff while minimizing environmental impact and maximizing water resource utilization? Discuss the integration of green infrastructure, such as permeable pavements and green roofs, with traditional drainage systems, and evaluate the role of advanced technologies, like sensor networks and machine learning algorithms, in optimizing the performance and resilience of urban drainage networks. Additionally, analyze the social, economic, and regulatory challenges associated with implementing sustainable drainage solutions in urban areas, and propose strategies for stakeholder engagement, policy development, and long$-$term maintenance to ensure the success and longevity of these systems.