Center for Climate Environment Real-scale Testing, Korea Conformity Laboratories, 5, Jeongtong-ro, Deoksan-myeon, Jincheon-gun, Chungcheongbuk-do, 27872, South Korea E-mail:
Korea Transport Institute, Korea Expressway Corporation, 208-96, Dongbu-daero 992beon-gil, Dongtan-myeon, Hwaseong, Gyeonggi-do, 18489, South Korea.
Water Sci Technol. 2021 May;83(10):2452-2462. doi: 10.2166/wst.2021.118.
Rapid urbanization has led to altered thermal circulations in major cities that are responsible for the increasing occurrence of urban heat islands (UHIs) and events such as tropical nights and heat waves. To effectively mitigate such events, low-impact development (LID) and green infrastructure strategies have been developed. In Korea, LID techniques focus mainly on road pavement materials; however, issues regarding the reliability of measurements due to differences in the measurement equipment and studied specimens persist. This study presents the design of a green infrastructure surface temperature measurement (GSTM) instrument and a reliable methodology developed to evaluate the performance of pavement materials under controlled climate conditions. The developed GSTM instrument and methodology were tested by monitoring the surface temperature of materials based on LID practices and dense-graded asphalt and evaluating their ability to mitigate UHI and tropical night phenomena. The experiments were conducted under controlled climate conditions, using summer climate conditions of Seoul's typical meteorological year data. The UHI and tropical night phenomena mitigation performance of the pavement materials was evaluated by analyzing the correlation between the pavement materials' albedo and surface temperature using porous block specimens of different colors and LID-based pavement materials. The greening block recorded the most significant reduction in surface temperature, showing a difference of 22.6 °C, 185 min to the dense-graded asphalt. The white and yellow porous blocks showed surface temperature differences of 10.2 °C and 8.2 °C respectively compared to the dense-graded asphalt. The results revealed that pavement materials with higher albedo, more evaporation, and lower heat capacity have superior performance in mitigating UHI and tropical night events.
快速城市化导致主要城市的热循环发生变化，这是造成城市热岛（UHI）和热带夜晚、热浪等事件日益增多的原因。为了有效缓解这些事件，已经开发了低影响开发（LID）和绿色基础设施策略。在韩国，LID 技术主要集中在道路路面材料上；然而，由于测量设备和研究样本的差异，仍然存在测量可靠性的问题。本研究提出了一种绿色基础设施表面温度测量（GSTM）仪器的设计和一种可靠的方法，用于在受控气候条件下评估路面材料的性能。开发的 GSTM 仪器和方法通过监测基于 LID 实践和密级配沥青的材料表面温度，并评估它们缓解 UHI 和热带夜晚现象的能力来进行测试。实验在受控气候条件下进行，使用首尔典型气象年数据的夏季气候条件。通过分析不同颜色的多孔块和基于 LID 的路面材料的路面材料反照率和表面温度之间的相关性，评估路面材料对 UHI 和热带夜晚现象的缓解性能。绿化块记录到的表面温度降低最为显著，与密级配沥青相比，差异为 22.6°C，185 分钟。白色和黄色多孔块与密级配沥青相比，表面温度分别相差 10.2°C 和 8.2°C。结果表明，反照率较高、蒸发量较大、热容较低的路面材料在缓解 UHI 和热带夜晚事件方面表现更优。
