Sustainability, Arup, Hong Kong Level 5 Festival Walk, 80 Tat Chee Avenue, Kowloon Tong, Kowloon, Hong Kong.
The Green Earth, Hong Kong, Room 703, 7/F, Kwai Cheong Centre, No. 50 Kwai Cheong Road, Kwai Chung, Hong Kong.
Sci Total Environ. 2022 Sep 1;837:155681. doi: 10.1016/j.scitotenv.2022.155681. Epub 2022 May 13.
With rapid urbanization, the use of external lighting to illuminate cities for night-time activity is on the rise worldwide. Many studies have suggested the excessive use of external lighting causes light pollution, which harms human health and leads to energy wastage. Although more awareness has been raised, there are not many regulations and guidelines available. As one of the cities most affected by light pollution in the world, Hong Kong has started exploring this issue within the general and business communities. However, studies that quantitatively evaluate the problem of light pollution in this city are lacking. This study aimed to assess light pollution quantitatively through measurement and numerical modelling. To achieve this, measurement protocols were developed, and site measurements were carried out in one of the known problem areas, Sai Yeung Choi Street in Mong Kok district. Through this exercise, both vertical and horizontal illuminances on the street level and the light distribution along the street were determined. An average level of 250 lx for the vertical illuminance was found, which was 3-4 times higher than the recommended brightness for normal activity. The light environment of the measured area was also modelled with the simulation program DIALux. This effort complemented the measurements by providing a means to increase the resolution on the light variation and to visualize light pollution in a 3D environment. The simulation results were verified by correlating the numerical model with measurements. The correlated model was exercised in a subsequent sensitivity study to predict possible outcomes with changing lighting pattern and lighting lumen level. This study serves to quantify this issue, which helps with the further development of effective solutions.
随着城市化的快速发展，全球范围内用于夜间活动的外部照明越来越多。许多研究表明，过度使用外部照明会导致光污染，从而危害人类健康并导致能源浪费。尽管人们的意识有所提高，但可用的法规和指南并不多。作为世界上受光污染影响最大的城市之一，香港已开始在普通市民和商界中探索这个问题。然而，缺乏对这个城市光污染问题进行定量评估的研究。本研究旨在通过测量和数值建模来定量评估光污染问题。为此，制定了测量协议，并在旺角区西洋菜南街的一个已知问题区域进行了现场测量。通过这项工作，确定了街道层面的垂直和水平照度以及沿街道的光分布。发现垂直照度的平均水平为 250 勒克斯，是正常活动推荐亮度的 3-4 倍。还使用模拟程序 DIALux 对测量区域的光照环境进行建模。这项工作通过提供一种增加光照变化分辨率的方法并在 3D 环境中可视化光污染来补充测量。通过将数值模型与测量结果相关联来验证模拟结果。使用相关模型进行了后续敏感性研究，以预测改变照明模式和照明流明水平可能产生的结果。本研究有助于量化这个问题，从而有助于进一步开发有效的解决方案。
