A SUB-BOTTOM PROFILER SURVEY ON THE SIRIO LAKE

In the present article, through an integrated geophysical and geological study, we intend to determine the thickness of sediments deposited on the bottom of Lake Sirio (Ivrea - TURIN), through geophysical surveys carried out with a Subbottom Profiler (Seismic Sediment Profiler). This survey was also carried out in order to highlight any geological discontinuity, which may possibly indicate an interaction between the waters of the lake in question and sub-river sources that feed the lake itself, since superficially it does not have tributaries. In addition to the geophysical surveys, measurements of electrical conductivity and water temperature of the lake were performed in order to find a variation of these parameters, which could indicate the presence of a recharge area of the reservoir by underground sources. In the first part of the elaboration, the geology of the area in question is introduced, based on authoritative studies conducted in the past, relative to the geology of the complex called the Morainian Amphitheater of Ivrea (following, MAI). Subsequently, the discussion continues with the analysis of geophysical data for the estimation of the sediment thickness of the bottom of the basin, trying to correlate the results obtained by the seismic profiler, with some results of studies previously carried out on the Sirio or on geologically lakes. analogues, belonging to the same morainic amphitheater.

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