Photogrammetric and LIDAR surveys on the Sciara del Fuoco to monitor the 2007

Stromboli eruptionBernardo E.1, Coltelli M.2, Marsella M.1, Proietti C.2,

Sonnessa A.11 Sapienza Università Roma

2 Istituto Nazionale Geofisica e Vulcanologia, Sezione di Catania

Aerial surveys carried out between 2001 and 2007: high resolution Digital Elevation Model (horiz./vert. resolutions 15-20 cm/20-50 cm)

Photogrammetric and LIDAR surveys made available pre, post and syn-

eruption DEMs for monitoring both the 2002-03 and 2007 eruptions

funded by the Italian Civil Protection: GNV and INGV-DPC research programs

Photogrammetric and LIDAR surveys of the 2007 eruption

2006:Pre-eruptionLIDAR

4 March 2007:syn-eruptionphotogrammetric

15-16 March 2007: syn-eruptionphotogrammetric

12 April 2007: Eruption endphotogrammetric

22 May 2007Post-eruptionLIDAR

The available DEMs, as well as the corresponding orthophotos allowed to:

reconstruct and model slope deformations and the main morphological features connected to volcanic activity during the last two effusive eruptions (2002-03 and 2007)

evaluate the temporal evolution of the lava flow field

2001 aerial phothogrammetry

2: slope deformations, connected to volcanic 2: slope deformations, connected to volcanic activity activity – building of the lava terrace (2002-– building of the lava terrace (2002-2003) and its vertical displacement (2007)2003) and its vertical displacement (2007)

Aerial photogrammetry post 2007

2007 residual

2: slope deformations, connected to 2002-2003 2: slope deformations, connected to 2002-2003 volcanic activityvolcanic activity

– – landslide and building of the lava terracelandslide and building of the lava terrace

Aerial photogrammetry post 2002-2003

Aerial photogrammetry post 2007

2: slope deformations, connected to 20072: slope deformations, connected to 2007volcanic activityvolcanic activity

– – vertical displacement of the lava terrace and slope vertical displacement of the lava terrace and slope bulgingbulging

2: slope deformations, connected to volcanic activity 2: slope deformations, connected to volcanic activity

3: Example of the reconstruction of the 2002-3: Example of the reconstruction of the 2002-2003 lava flow fields (27/01/2003)2003 lava flow fields (27/01/2003)

3: Reconstruction of the 2007 lava flow fieldsOrthorectificaton of helicopter photos to

integrate aerial surveys, by the

scientific software, OrthoView - DITS,

Università La Sapienza)

F1, F1a, F1b: active on 27 February onlyF2 active 27 February – 02 AprilF3 active 09-10 March

Lava flow limits defined by the

analysis of aerial orthophotos

flow volumes and daily effusion rate evaluated from the comparisons among syn, post and pre-eruption DEMs from photogrammetric and LIDAR surveys for the last two effusive eruptions of Stromboli

comparison between effusion rates from aerial and satellite data

Aerial surveys, even if less frequent than satellite observations, are very useful for constraining effusion rate trends because they can be adopted for lava volume estimating from the quantitative comparison of multi-temporal DEMs

Quantitative data contributed to improve the knowledge of volcanic processes, in particular to evaluate the connection between lava effusion and slope instabilities at Stromboli volcano

ConclusionsConclusions

Thank you for your

attention!!!