Symposium on Energy Geotechnics 2023, Journal Year: 2023, Volume and Issue: unknown

Published: Sept. 28, 2023

The subsurface temperatures of many urban areas are significantly rising, causing an emerging underground climate change, also known as heat islands (SUHIs) [3,11]. SUHIs result from two types sources in the underground: large-scale drivers at surface and localized subsurface. Large-scale consist infrastructure that generate atmosphere, which eventually diffuses into Localized infrastructures directly reject [8, 11]. impacts lead to globally concerning issues have detrimental effects on biodiversity ecosystems, public health, transportation [2, 5, 9]. Considering these impacts, it is crucial understand key variables fundamental mechanisms govern this silent hazard. current literature mostly focuses intensity show highly heterogeneous around SUHI [1, 4, 6-8]. However, limited information available about features (i.e., drivers) SUHIs. To explore problem, study summarizes measurements a unique sensing network deployed Chicago Loop district by Rotta Loria et al. [10] monitor temperature across myriad built environments ground. This facility enables inherent characteristics underpin future studies devoted spatial temporal evolution SUHIs. includes >150 HOBO sensors various structures (e.g., building basements, parking garages, train lines, pedways, tunnels, streets) well parks streets. Figure 1 shows relationship between daily average air for monitored metro tunnels. An analysis monitoring data reveals generally warmer than during winter cooler summer. Furthermore, such markedly heterogeneous, with maximum values up 36°C. Temperatures within same level considered environment lower x X) can vary 15°C, different levels y 10.8 °C. differences among be attributed influence architectural operational features, materials constituting envelope, number distribution channels apertures, presence ventilation systems waste heat, including human activity, transport, operating utility equipment. hourly garages basements further surge working hours day. rise daytime was observed more prominent starting March 2021, when COVID-19 restrictions started become less stringent Chicago, people transitioned new normality. Such evident indicating correlation increased vehicular activity. Monitoring referring depth 4 m underneath Grant Park 12 heart its buildings reveal ground locations reads 11°C 18°C, respectively. significant difference results fact park does not appear affected whereas indeed influenced heat. Specifically, differential high 25 °C compared Park, cause change. yields outcomes: one hand, severe district; other inherently heterogenous nature environments, arguably characterize cities worldwide. Waste continuously rejected exceed undisturbed temperatures. A variability characterizes belonging only categories garages), but category varying or given environment. Therefore, warrants consideration robust modeling efforts presented serve resource simulations. foster better understanding, utilization management energy resources. Understanding aspects assessment geothermal potential areas, variation thermal properties geomaterials, optimization design performance geotechnical

Language: Английский