Urbanie & Urbanus

The Relationship between Urban Morphology on Impervious Surface Coverage in High-Density Areas - The HK Northern Metropolitan Area as a Case Study

Shaoqi Chen

MUD (Master of Urban Design), Faculty of Architecture, University of Hong Kong

and  Frank Chow

MUD (Master of Urban Design), Faculty of Architecture, University of Hong Kong


Impervious surfaces are one of the key factors that impact stormwater management, especially for high density urban areas. This study explores the relationship between urban morphology and impervious surface coverage in high-density areas to address stormwater management challenges. Focusing on Hong Kong Northern Metropolitan Area as a case study, the research examines land use planning and diverse urban morphologies to understand the impact of impervious surfaces on stormwater runoff. From land use planning to analyzing different urban morphologies, the study elucidates the amount and distribution of impervious surfaces and their impact on stormwater runoff management in urban design. Findings provide valuable insights for urban design practices, enabling targeted strategies for sustainable stormwater management in high-density areas. By understanding the relationship between Hong Kong's context-specific urban form and properties of impervious surface /properties, targeted strategies can be developed to address the unique challenges, especially in the context of planning for the latest urban growth. Promoting the use of green infrastructure and nature-based solutions, the research contributes to the knowledge on urban stormwater management, emphasizing resilience in Hong Kong’s new urban environment.