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Geothermal features annual monitoring report - January 2023

TR 2023/02
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Abstract

Annual geothermal monitoring data from 2005 to 2023 are presented for long-term observations of geothermal feature conditions.

Field surveys were conducted in May 2022 – February 2023. Nine geothermal fields were visited: Ngā Tamariki, Ōrakei-kōrako, Reporoa, Rotokawa, Tauhara, Te Kopia, Waikite, Waiotapu, and Whangairorohea. Atiamuri was not visited due to illness.

Water temperature and pH measurements were taken where possible, and general observations on the feature conditions were also recorded. Images captured from a Fluke infrared thermal imaging camera are included in this report to show the thermal profile of some of the surface features.

The Hydrothermal Eruption Crater at Ngā Tamariki has had various changes since the landslide in 2019. High rainfall levels over the past year may have contributed to the higher levels of some of the features. Some features were not visited in 2021 due to different staff members conducting the monitoring who did not visit all the same sites.

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Report: TR 2023/02

Author: Claire Kotze (Waikato Regional Council)