| Title | Hydrogeological Regime of the Geysers (Kronotsky Nature Reserve, Kamchatka) After Landslide 3.06.2007 |
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| Authors | Alexey KIRYUKHIN, Tatiana RYCHKOVA, Pavel VORONIN, Andrey POLYAKOV |
| Year | 2015 |
| Conference | World Geothermal Congress |
| Keywords | Geysers, Kamchatka, Landslide |
| Abstract | This study views the results of the Valley of Geysers hydrogeological regime monitoring in 2007-2013 on geysers Velikan, Bolshoy, major geysers and springs following the disastrous landslide of 3.06.2007. According to the observations of geyser Bolshoy, its average eruption period has decreased after the landslide almost twofold and is 63 min, while its activity was defined by the level of Podprudnoye Lake. Geyser Velikan observations expose essential decrease of eruption period from its average annual value of 379 min (2007) to 335 min in the first three years following the disastrous landslide, whereupon its average annual value has stabilized. It has been found out that geyser Velikan within hydrogeological cycle shows eruption period increase in winter (on the average 41-45 min). Average annual value of the deep discharge component (defined by the chloride method) of the hydrothermal system is estimated at 215 kg/s, its decrease (by 30%) is observed during the spring-summer flood. Meteoric water injection from Podprudnoye Lake has not effected significant hydrochemical changes in geysers Velikan and Pervenetz, but geyser Bolshoy displays dilution according to the fluid major chemical components analysis. TOUGH2-modeling shows that the eruption period of the geysers is sensitive to the local surface waters level. The study examines seismic effect on the eruption regime of geyser Velikan. |