Sustainable Urban Drainage Systems: A Case Study of Bonomala Road to Fashion Road, Tongi College Gate

Abstract

Rapid urbanization in Tongi, particularly along the Bonomala Road to Fashion Road area, has resulted in severe drainage and waterlogging problems. The existing drainage system is narrow, poorly maintained, and frequently blocked by solid waste andpolythene, resulting in traffic disruptions, economic losses, and public health risks during heavy rainfall. This study focuses on designing a sustainable urban advanced drainage system (SUDS) by integrating hydrological analysis, rainfall data (2015–2025), GIS mapping, and AutoCAD-based drain design. The estimated peak runoff of 7.3 m3/s was determined using standard hydrological methods. A rectangular drain of 1.5 m × 1.5 m was designed with a discharge capacity of 7.8 m3/s to ensure effective stormwater management. Additionally, sustainable drainage measures such as permeable pavements, bio-swales, detention ponds, and rainwater harvesting were proposed to reduce surface runoff and enhance groundwater recharge. The findings suggest that adopting a combined approach of improved drainage infrastructure and SUDS practices can effectively reduce waterlogging, improve urban resilience, and serve as a replicable model for other flood-prone urban areas in Bangladesh..