Stuff/ last week highlighted the mystery of basements in the city developing flooding problems since a new ground-source heating technique gained popularity in the Christchurch CBD after the earthquake. The system is believed to be causing flooding in at least two major buildings in the city including Ballantynes department store. It seems to me to be too much of a coincidence that at the same time heat exchange systems are being commissioned we get flooding in basements. Iain McGregor/Stuff The new heat exchange systems used in buildings in the Christchurch CBD is said to increase the risk of liquefaction. “My sense is that there is a direct link between rise in water table and heat exchange systems, but it’s not clear-cut.

Source: Stuff July 16, 2021 06:00 UTC