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| Titel |
Hazards of volcanic lakes: analysis of Lakes Quilotoa and Cuicocha, Ecuador |
| VerfasserIn |
G. Gunkel, C. Beulker, B. Grupe, F. Viteri |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: 2nd EGU Alexander von Humboldt Conference "The role of Geophysics in Natural Disaster Prevention" ; Nr. 14 (2008-01-02), S.29-33 |
| Datensatznummer |
250012079
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| Publikation (Nr.) |
 copernicus.org/adgeo-14-29-2008.pdf |
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| Zusammenfassung |
Volcanic lakes within calderas should be viewed as high-risk systems, and an
intensive lake monitoring must be carried out to evaluate the hazard of
potential limnic or phreatic-magmatic eruptions. In Ecuador, two caldera
lakes – Lakes Quilotoa and Cuicocha, located in the high Andean region
>3000 a.s.l. – have been the focus of these investigations. Both volcanoes
are geologically young or historically active, and have formed large and
deep calderas with lakes of 2 to 3 km in diameter, and 248 and 148 m in
depth, respectively. In both lakes, visible gas emissions of CO2 occur,
and an accumulation of CO2 in the deep water body must be taken into
account.
Investigations were carried out to evaluate the hazards of these volcanic
lakes, and in Lake Cuicocha intensive monitoring was carried out for the
evaluation of possible renewed volcanic activities. At Lake Quilotoa, a
limnic eruption and diffuse CO2 degassing at the lake surface are to be
expected, while at Lake Cuicocha, an increased risk of a phreatic-magmatic
eruption exists. |
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