期刊
SCIENTIFIC REPORTS
卷 8, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-018-20061-5
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资金
- EU Collaborative Projects GLOBAQUA Managing the effects of multiple stressors on aquatic ecosystems under water scarcity
- CARIPARO Foundation Project PASTtoFUTURE Reading signatures of the past to predict the future: 1000 years of stratigraphic record as a key for the future of the Venice Lagoon
- Shell International Exploration and Production within the project Tidal vs. tidally-influenced fluvial point bars: facies distribution and implications for reservoirs production development
- project SID (Padova University) [BIRD168939]
- PRAT project of the University of Padua [CPDA147114]
- INdAM-GNCS
Whether or not one can detect relict signatures of the past imprinted in current landscapes is a question of the utmost theoretical and practical relevance for meandering tidal channels, owing to their influence on the morphodynamic evolution of tidal landscapes, a critically fragile environment, especially in face of expected climatic changes. Unravelling the sedimentary patterns of ancient channels is an expensive process that usually requires high resolution sediment coring. Here we use a novel inversion process of multi-frequency electromagnetic measurements to reveal the signature and characterize the dynamics of a salt-marsh paleo-meander in the Venice Lagoon. We show that the ancient meander migrated laterally while vertically aggrading, developing a peculiar bar geometry which is less common in analogous fluvial meanders. The observed point-bar dynamics and the associated architectural geometry are consistent with remote sensing and borehole data and contrast with current assessments of tidal meander morphodynamics mediated from classical fluvial theories. In addition, the proposed technique, rapid and non-invasive, bears important consequences for detecting buried stratal geometries and reconstructing the spatial distribution of ancient sedimentary bodies, providing quantitative data for the description of landscape evolution in time.
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