Khalaji, Fatemeh (2025) Water Quality and Quantity Management Using WSUD to Address Climate Change, Urbanisation and Ageing Stormwater Infrastructure In Existing Developments. Research Master thesis, Victoria University.

Abstract

This research aims to advance the application of Water Sensitive Urban Design (WSUD) strategies to address the impacts of climate change and urbanization on existing urban stormwater drainage systems, creating more resilient and sustainable urban environments. Climate change and rapid urbanization pose significant challenges to water management worldwide. Integrating sustainable water management practices into urban planning offers a promising approach to mitigate these impacts. This thesis investigates the effectiveness of WSUD strategies in managing stormwater runoff, thereby improving water quality, and reducing flood risks in urban environments. Utilizing PCSWMM, a hydrologic and hydraulic modelling software, the performance of various WSUD features within a selected urban catchment area is simulated and analysed. The study evaluates these features to reduce peak flow rates, decrease pollutant loads, and defer stormwater system upgrades. Furthermore, the research assesses the potential of these strategies to address climate change and urbanization impacts in existing developments. The study provides an integrated assessment of hydraulic behaviour, water quality outcomes, and life-cycle costs using a long-term continuous hydrologic and hydraulic modelling framework, enabling comparison of individual and hybrid WSUD strategies. Through comprehensive modelling and scenario analysis, this contributes to understanding WSUD's role in mitigating the adverse effects of climate change and urbanization on stormwater systems. The findings aim to inform urban planners, engineers, and policymakers on effective strategies for incorporating these methods into urban development plans, promoting sustainable stormwater management, and building resilient cities.

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