GNGTS 2017 - 36° Convegno Nazionale

GNGTS 2017 S essione 3.2 657 Tab. 2 - Main characteristics of Sirio and Candia lakes. Name Sirio Candia Basin Dora Baltea - Po Dora Baltea - Po Origin Glacial erosion Proglacial Mean elevation 266 m 226 m Volume 5.25 Mm 3 7.2 Mm 3 Maximum depth 43.5 m 7.5 m Mean depth 18 m 4.7 m Maximum length 0.9 km 2.11 km Maximum width 0.45 km 0.85 km Perimeter 3.3 km 5.8 km Surface 0.3 km 2 1.5 km 2 Catchment area 1.4 km 2 8.9 km 2 puzzling situation with respect to sediment nature and related thickness. Experimental evidences. We performed the Sub-bottom surveys with a Syquest Bathy- 2010PC Chirp profiler driving two TR-109 3.5-kHz transducers or a Stratabox Line-in-Cone 10-kHz transducer. On the Sirio Lake, 11 profiles were acquired, for a total investigated length of about 3.3 km. On the Candia Lake, we acquired 30 Sub-bottom profiles, for a total length of about 13 km and, contemporarily, 9.5 km of GPR data were recorded with a 40-MHz Subecho antenna and a K2 IDS control unit. All the acoustic and GPR profiles were tracked with Fig. 1 - Candia subbottom profile: a) raw data and b) processed.