Fig. 3: Waste heat per unit area of heat source injected in the subsurface of the Chicago Loop.
From: The silent impact of underground climate change on civil infrastructure
a Thermal power, \(\dot{q}\), at varying depths, z, and times t (the darker the shading, the higher the injected thermal power); b average trends of thermal power, \(\dot{\bar{q}}\), for individual soil layers.
