The dark side of the Albano crater lake

M. Anzidei, A. Esposito, F. De Giosa

Abstract


The Albano Lake is the deepest volcanic lake among the volcanoes located in the Italian peninsula.
It belongs to the Colli Albani volcanic complex whose last largest eruptions are dated back to about
~30 Kyr, although minor events likely occurred during historical times at 7000 yr B.P. or earlier.
After the end of the volcanic activity the Crater of Albano became a lake whose level changes are
known since historical times. On November 2005, was performed the first very high resolution
bathymetric survey of the Albano lake by means of a multibeam echo sounder, integrated with the
GPS/RTK positioning technique A particular effort was devoted to produce a high resolution
morphobathimetric map, which aims to provide a Digital Terrain Model of the lake floor for wide
applications. The surveys did not revealed significant gas exhalative centres, which should indicate
a current active gas release from the lake floor. Here we show the technical details of the
bathymetric surveys, the very high resolution bathymetric map and the main morphological features
of the Albano Lake bottom.

Keywords


Alban Hills volcano;Albano Lake;multibeam bathymetry

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References


DOI: https://doi.org/10.4401/ag-3094
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X