Morphostratigraphic framework of the Venice Lagoon (Italy) by very shallow water VHRS surveys: Evidence of radical changes triggered by human-induced river diversions

Details Morphostratigraphic framework of the Venice Lagoon (Italy) by very shallow water VHRS surveys: Evidence of radical changes triggered by human-induced river diversions Morphostratigraphic framework of the Venice Lagoon (Italy) by very shallow water VHRS surveys: Evidence of radical changes triggered by human-induced river diversions

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3609406t&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 9, CiteID L09406

Physics

Geophysics

5

Marine Geology And Geophysics: Marine Seismics (0935, 7294), Biogeosciences: Estuarine And Nearshore Processes (4235), Marine Geology And Geophysics: Marine Sediments: Processes And Transport, Marine Geology And Geophysics: Littoral Processes, Hydrology: Geomorphology: Hillslope (1625)

Scientific paper

This study is mainly based on a wide Very High Resolution Seismic (VHRS) survey that utilized an ad hoc technique designed for investigations in very shallow waters (about 1 m depth). This method allowed the acquisition of excellent images of the subsurface down to 15-20 m b.s.l. with a resolution of about 10 cm. Buried geomorphological features, such as fluvial channel-levee systems and tidal channels, were imaged for the first time in the shallows and provided new insight into the Holocene evolution of the southern lagoon basin. Furthermore, the new seismic data were used to reconstruct the morphostratigraphic framework of the Venice Lagoon. We provide an Upper Quaternary morphostratigraphic model of the Venice Lagoon and present some evidence of radical changes resulting from human-induced river diversion in the sedimentary regime and in the morphological setting of the southern basin that has occurred over the last millennium.

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