Rainwater Harvesting Approach at Daffodil International University (DIU) Campus

Abstract

Dhaka city faces significant challenges related to water scarcity and urban waterlogging, driven by rapid urbanization, overpopulation, and inadequate water management systems. This study explores the feasibility and implementation of Rainwater Harvesting (RWH) systems as a sustainable solution to mitigate these issues. Using Daffodil Tower as a case study, the analysis focused on hydrological data, building design trends, and optimal tank dimensions and locations for storage and recharge. Results indicate that RWH can provide a reliable supplementary water source, with annual rooftop runoff estimated at 2211.3 m³, supporting up to 16 days of water demand under the Rationing Method (RM). A tank with a capacity of 9942.1 m³ was proposed, designed to integrate seamlessly into the campus environment. Additionally, the study highlighted the importance of recharge structures and logical water distribution methods to maximize system efficiency. These findings confirm the economic and environmental feasibility of incorporating RWH systems in urban settings like Dhaka, offering a sustainable pathway to address the city's pressing water challenges.