School of Engineering Department of Civil and Environmental Engineering 91 Recyclable Hydrogel-Based Brick for Construction on Mars: a Feasibility Study Supervisor: QIU Jishen / CIVL Co-Supervisor: XUE Tianju / CIVL Student: ZHANG Hau King / CIVL Course: UROP 1100, Spring UROP 2100, Summer This report examines the influence of powder bed temperature and air pressure on the characteristics of single droplets, including penetration depth, spreading diameter, saturation level, and contact angle. A lower air pressure or higher temperature results in a greater depth-to-diameter ratio, suggesting a tendency for deeper penetration. The saturation level exhibits a positive correlation with temperature, while its relationship with air pressure remains unclear. Additionally, due to the limited experimental data on evaporation rate, no significant trends could be established. Nevertheless, the potential factors affecting the evaporation rate are discussed in the following section. Assessing Climate Change Impacts on Coastal Cities Using High-Resolution Model Simulations Supervisor: SU Hui / CIVL Student: CHEN Zixuan / PHYS Course: UROP 1100, Spring UROP 3200, Summer This comprehensive study analyzes precipitation trends in Hong Kong using observational data from the Hong Kong Observatory (HKO) spanning 1884-2025. Building on previous methodologies, we document significant increases in annual precipitation totals and extreme rainfall days. Key findings include a marginal but statistically insignificant lengthening of the rainy season; June precipitation shows the largest daily increase followed by autumn surges; Typhoons contribute 22.4% of annual precipitation on average, with evidence of increasing intensity, duration, and season length. These findings highlight critical shifts in Hong Kong’s hydrological regime with implications for climate adaptation. Assessing Climate Change Impacts on Coastal Cities Using High-Resolution Model Simulations Supervisor: SU Hui / CIVL Student: KWAN Sum Yi / CIVL Course: UROP 1100, Summer Extreme weather events caused by global warming, especially intense extreme precipitation, significantly impact the coastal cities. By leveraging a high-resolution model simulation dataset from the China Meteorological Administration (CMA), the analysis on the frequency and intensity of precipitation, focusing on Hong Kong, can be conducted. The temporal analysis revealed a statistically significant increase in both the amount of precipitation and the frequency of extreme rainfall events. These findings highlighted the urgent need for the development of adaptive strategies and urban resilience planning. The spatial analysis of the dataset is planned for future research.
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