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Geothermal Research and Tech IEA

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Geothermal Research and Tech IEA ( geothermal-research-and-tech-iea )

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Participating countries in Annex 1 are: Australia, Iceland, Italy, Japan, Mexico, New Zealand, Switzerland and the United States. GNS Science, Wairakei Research Centre, New Zealand, is the Operating Agent. Chris Bromley, of GNS Science, is the Annex Leader. 2.1 Tasks of Annex I In 2010, Annex I activities consisted of five Tasks, described below. 2.1.1 Task A - Impacts on Natural Features (Task Leader: Chris Bromley, GNS Science, New Zealand) (Participants: Iceland, USA, Japan, Italy, New Zealand) Impacts of geothermal developments on natural geothermal features such as geysers, hot springs and fumaroles are documented. Methods are devised to accurately monitor changes and to avoid or mitigate the adverse impacts of development on these geothermal features, which often have significant economic value for tourism and cultural value for indigenous peoples. 2.1.2 Task B - Discharge and Reinjection Problems (Task Leader: Robert Reeves, GNS Science, New Zealand) (Participants: Iceland, USA, Japan, Italy, Mexico, New Zealand) Better methods of overcoming adverse impacts of geothermal developments on aspects of the environment are developed. These include the effects of gas emissions from geothermal power plants on air quality; the effects of toxic chemicals in waste fluid that may be discharged into the ground or into rivers; and the effects of ground subsidence resulting from pressure decline. Projects examine the problems associated with disposal of waste geothermal fluids and the effects of CO2, Hg and H2S gas emissions, along with mechanisms and mitigation options such as using injection to mitigate ground subsidence. Figure 2.2 Sampling fumarole gases, New Zealand. (Photo courtesy of GNS Science) 35

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