Assessing Sustainable Drainage System Performance in Urban Residential Developments in City X

Thesis Abstract

Urban residential developments increasingly incorporate Sustainable Drainage Systems (SuDS) to mitigate flood risks, improve water quality, and reduce urban heat island effects; however, their performance in City X remains under-evaluated amidst rapid urbanization and climate variability. This study aims to assess the effectiveness of SuDS components within residential areas in City X, with specific objectives to evaluate their hydrological performance, stakeholder satisfaction, and environmental impacts; to analyze factors influencing system functionality; and to develop a comprehensive performance framework for urban sustainable drainage. Employing a mixed-methods research design, the study integrates quantitative hydrological modeling with qualitative stakeholder perceptions. The target population includes 50 urban residential developments fitted with SuDS, from which a stratified random sample of 20 developments was selected to ensure representativeness across age, size, and drainage types. Data collection instruments comprise structured questionnaires administered to 200 residents, key informant interviews with urban planners and environmental engineers, and hydrological data obtained from municipal records over a five-year period. The study also utilizes on-site field measurements of flow rates, water quality parameters, and system maintenance records. Validity and reliability of the questionnaires are established through pilot testing and Cronbach’s alpha coefficient analyses. Data analysis encompasses descriptive statistics to characterize system features and stakeholder perceptions, inferential statistics employing multiple regression analysis to identify determinants of system performance, and thematic analysis for qualitative data to explore stakeholder insights. Hydrological simulation models, such as SWMM (Storm Water Management Model), are employed to quantify runoff reduction, water retention, and pollutant removal efficiencies under different rainfall scenarios. Theoretical frameworks underpinning the study include the Integrated Water Resources Management (IWRM) theory and the Diffusion of Innovations theory, which inform the interpretation of stakeholder adoption levels and system integration. Expected findings indicate variability in SuDS performance related to design correctness, maintenance practices, and community engagement, with systems demonstrating higher water retention and pollutant removal where active stakeholder participation occurs. The study anticipates revealing critical factors such as system age, complexity, and maintenance frequency as significant predictors of functional efficacy. Moreover, resident satisfaction levels are projected to correlate positively with perceived environmental benefits and system aesthetics. The research aims to contribute novel insights into best practices for SuDS implementation in urban contexts, filling gaps in empirical data regarding long-term system performance and stakeholder attitudes in City X. The main conclusion emphasizes the importance of integrated design approaches, robust maintenance protocols, and community involvement in enhancing SuDS performance. The study recommends policy interventions to strengthen institutional frameworks for regular system inspections, capacity-building initiatives for system users, and adaptive management strategies tailored to local climate and urban conditions. In addition, it advocates for the development of a standardized performance assessment model to aid urban planners and policymakers in evaluating and optimizing SuDS in similar urban environments, thus advancing knowledge on sustainable urban drainage practices. Future research avenues include longitudinal studies to monitor system resilience over time and comparative analyses across different climatic zones to generalize findings beyond City X.