The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
L. Tosi - One of the best experts on this subject based on the ideXlab platform.
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TerraSAR-X reveals the impact of the mobile barrier works on Venice coastland stability
Remote Sensing of Environment, 2009Co-Authors: T. Strozzi, P. Teatini, L. TosiAbstract:Land subsidence and Eustacy concurred to make the relative sea level in Venice (Italy) 23 cm higher over the last century. In order to protect the city and its lagoon environment from increased flooding, a series of mobile barriers are under construction at the three inlets of Lido, Malamocco, and Chioggia connecting the Adriatic Sea to the inner water body. Since 2003 work has been proceeding with the reinforcement and extension of the existing jetties and the construction of breakwaters, harbors, and a small island within the Lido inlet. We detected significant local settlements of a few centimeters between March 2008 and January 2009 at the three inlets induced by the construction works through an interferometric analysis of 30 satellite radar images acquired by the new German TerraSAR-X mission. On a more regional scale we observe that the city of Venice and the other major urban settlements on the lagoon littorals are not impacted by subsidence during this period. The very high spatial resolution of 3 m and the short repeat-time interval of 11 days of TerraSAR-X enable the investigation of displacements with an unprecedented observed level of details, opening new perspectives to geodynamic's research and civil engineering sectors for the monitoring of large infrastructures with potential vulnerability to terrain motion.
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Eustacy and land subsidence in the venice lagoon at the beginning of the new millennium
Journal of Marine Systems, 2004Co-Authors: L. Carbognin, P. Teatini, L. TosiAbstract:Abstract Venetian land subsidence, both natural and induced by groundwater withdrawal, and northern Adriatic Sea eustasy have caused 23 cm of relative land subsidence referred to as the mean sea level over the last 100 years. This relative elevation loss has been vital for Venice's existence, inasmuch as Venice lives in the water. After a short overview of the process during the past decades, the actual trend of relative ground-sea movement is presented by integrating high precision leveling, remote sensing measurements and tide gauge records. Geodetic and Interferometric Synthetic Aperture Radar (InSAR) data evidence the present ground stability of the central part of the lagoon, where the city of Venice is located, and slight sinking rates at the northern and southern extremities of the lagoon edges (3–5 mm/year) and at some places in the central and northern littorals (1–3 mm/year). At the same time, the latest tide gauge records indicate a renewal in the sea-level rising trend. Within the average secular eustatic rate of 1.13 mm/year, the value of −0.89 mm/year, observed near Venice during the period 1971–1993, increased to 1.53 mm/year when adding the records up to 2002.
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interaction between climate changes Eustacy and land subsidence in the north adriatic region italy
Marine Ecology, 2002Co-Authors: L. Carbognin, L. TosiAbstract:. The North Adriatic coastal area has experienced a serious relative sea level rise whose main component is land subsidence. Geological regional subsidence is ascribable to compaction and to deformation of substratum. Anthropogenic subsidence, which is due to ground fluid removal, has been severe in the second half of the 19th century, reaching values in meters. It is without doubt the main factor responsible for the instability of the entire coastal ecosystem. Widespread retreat of shoreline, seawater invasion, decay of vegetation, changes in the habitat of the flora and fauna have occurred. Sea level rise alone is linked to climate changes, which exhibit fluctuations of the order of a few hundred years; here, cold-wet periods alternated with warm-dry periods and, within them, shorter cold-wet and hot-dry cycles lasting for decades also alternated.
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Evidence of the present relative land stability of Venice, Italy, from land, sea, and space observations
Geophysical Research Letters, 2002Co-Authors: L. Tosi, T. Strozzi, P. Teatini, L. Carbognin, U. WegmullerAbstract:[1] The city of Venice is very vulnerable to loss in surface elevation as a result of subsidence and Eustacy because of its small elevation above sea level. The alarm of the scientific community related to this persistent problem is increasing because of the forecasts of sea level rise caused by global warming. In order to evaluate the present relative subsidence of Venice, a study has been performed by combining high precision leveling, Satellite Radar Interferometry (SRI) and tide gauge measurements. The analysis of the most recent data points out with an unprecedented detail the present ground stability of the city.
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SAR interferometry confirms the present land stability of Venice
IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH, 2001Co-Authors: T. Strozzi, L. Tosi, P. Teatini, U. Wegmuller, L. Carbognin, C. Werner, A. WiesmannAbstract:The city of Venice is very vulnerable to loss in land elevation as a result of subsidence and Eustacy because of its small elevation above sea level. The alarm of the scientific community related to this persistent problem is increasing because of the forecasts of sea level rise caused by global warming. In order to evaluate the present relative settlement of Venice, a study has been performed by combining high precision levelling surveys and SAR interferometry. The analysis points out at an unprecedented detail the present ground stability of the city.
L. Carbognin - One of the best experts on this subject based on the ideXlab platform.
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Eustacy and land subsidence in the venice lagoon at the beginning of the new millennium
Journal of Marine Systems, 2004Co-Authors: L. Carbognin, P. Teatini, L. TosiAbstract:Abstract Venetian land subsidence, both natural and induced by groundwater withdrawal, and northern Adriatic Sea eustasy have caused 23 cm of relative land subsidence referred to as the mean sea level over the last 100 years. This relative elevation loss has been vital for Venice's existence, inasmuch as Venice lives in the water. After a short overview of the process during the past decades, the actual trend of relative ground-sea movement is presented by integrating high precision leveling, remote sensing measurements and tide gauge records. Geodetic and Interferometric Synthetic Aperture Radar (InSAR) data evidence the present ground stability of the central part of the lagoon, where the city of Venice is located, and slight sinking rates at the northern and southern extremities of the lagoon edges (3–5 mm/year) and at some places in the central and northern littorals (1–3 mm/year). At the same time, the latest tide gauge records indicate a renewal in the sea-level rising trend. Within the average secular eustatic rate of 1.13 mm/year, the value of −0.89 mm/year, observed near Venice during the period 1971–1993, increased to 1.53 mm/year when adding the records up to 2002.
-
interaction between climate changes Eustacy and land subsidence in the north adriatic region italy
Marine Ecology, 2002Co-Authors: L. Carbognin, L. TosiAbstract:. The North Adriatic coastal area has experienced a serious relative sea level rise whose main component is land subsidence. Geological regional subsidence is ascribable to compaction and to deformation of substratum. Anthropogenic subsidence, which is due to ground fluid removal, has been severe in the second half of the 19th century, reaching values in meters. It is without doubt the main factor responsible for the instability of the entire coastal ecosystem. Widespread retreat of shoreline, seawater invasion, decay of vegetation, changes in the habitat of the flora and fauna have occurred. Sea level rise alone is linked to climate changes, which exhibit fluctuations of the order of a few hundred years; here, cold-wet periods alternated with warm-dry periods and, within them, shorter cold-wet and hot-dry cycles lasting for decades also alternated.
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Evidence of the present relative land stability of Venice, Italy, from land, sea, and space observations
Geophysical Research Letters, 2002Co-Authors: L. Tosi, T. Strozzi, P. Teatini, L. Carbognin, U. WegmullerAbstract:[1] The city of Venice is very vulnerable to loss in surface elevation as a result of subsidence and Eustacy because of its small elevation above sea level. The alarm of the scientific community related to this persistent problem is increasing because of the forecasts of sea level rise caused by global warming. In order to evaluate the present relative subsidence of Venice, a study has been performed by combining high precision leveling, Satellite Radar Interferometry (SRI) and tide gauge measurements. The analysis of the most recent data points out with an unprecedented detail the present ground stability of the city.
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SAR interferometry confirms the present land stability of Venice
IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH, 2001Co-Authors: T. Strozzi, L. Tosi, P. Teatini, U. Wegmuller, L. Carbognin, C. Werner, A. WiesmannAbstract:The city of Venice is very vulnerable to loss in land elevation as a result of subsidence and Eustacy because of its small elevation above sea level. The alarm of the scientific community related to this persistent problem is increasing because of the forecasts of sea level rise caused by global warming. In order to evaluate the present relative settlement of Venice, a study has been performed by combining high precision levelling surveys and SAR interferometry. The analysis points out at an unprecedented detail the present ground stability of the city.
P. Teatini - One of the best experts on this subject based on the ideXlab platform.
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TerraSAR-X reveals the impact of the mobile barrier works on Venice coastland stability
Remote Sensing of Environment, 2009Co-Authors: T. Strozzi, P. Teatini, L. TosiAbstract:Land subsidence and Eustacy concurred to make the relative sea level in Venice (Italy) 23 cm higher over the last century. In order to protect the city and its lagoon environment from increased flooding, a series of mobile barriers are under construction at the three inlets of Lido, Malamocco, and Chioggia connecting the Adriatic Sea to the inner water body. Since 2003 work has been proceeding with the reinforcement and extension of the existing jetties and the construction of breakwaters, harbors, and a small island within the Lido inlet. We detected significant local settlements of a few centimeters between March 2008 and January 2009 at the three inlets induced by the construction works through an interferometric analysis of 30 satellite radar images acquired by the new German TerraSAR-X mission. On a more regional scale we observe that the city of Venice and the other major urban settlements on the lagoon littorals are not impacted by subsidence during this period. The very high spatial resolution of 3 m and the short repeat-time interval of 11 days of TerraSAR-X enable the investigation of displacements with an unprecedented observed level of details, opening new perspectives to geodynamic's research and civil engineering sectors for the monitoring of large infrastructures with potential vulnerability to terrain motion.
-
Eustacy and land subsidence in the venice lagoon at the beginning of the new millennium
Journal of Marine Systems, 2004Co-Authors: L. Carbognin, P. Teatini, L. TosiAbstract:Abstract Venetian land subsidence, both natural and induced by groundwater withdrawal, and northern Adriatic Sea eustasy have caused 23 cm of relative land subsidence referred to as the mean sea level over the last 100 years. This relative elevation loss has been vital for Venice's existence, inasmuch as Venice lives in the water. After a short overview of the process during the past decades, the actual trend of relative ground-sea movement is presented by integrating high precision leveling, remote sensing measurements and tide gauge records. Geodetic and Interferometric Synthetic Aperture Radar (InSAR) data evidence the present ground stability of the central part of the lagoon, where the city of Venice is located, and slight sinking rates at the northern and southern extremities of the lagoon edges (3–5 mm/year) and at some places in the central and northern littorals (1–3 mm/year). At the same time, the latest tide gauge records indicate a renewal in the sea-level rising trend. Within the average secular eustatic rate of 1.13 mm/year, the value of −0.89 mm/year, observed near Venice during the period 1971–1993, increased to 1.53 mm/year when adding the records up to 2002.
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Evidence of the present relative land stability of Venice, Italy, from land, sea, and space observations
Geophysical Research Letters, 2002Co-Authors: L. Tosi, T. Strozzi, P. Teatini, L. Carbognin, U. WegmullerAbstract:[1] The city of Venice is very vulnerable to loss in surface elevation as a result of subsidence and Eustacy because of its small elevation above sea level. The alarm of the scientific community related to this persistent problem is increasing because of the forecasts of sea level rise caused by global warming. In order to evaluate the present relative subsidence of Venice, a study has been performed by combining high precision leveling, Satellite Radar Interferometry (SRI) and tide gauge measurements. The analysis of the most recent data points out with an unprecedented detail the present ground stability of the city.
-
SAR interferometry confirms the present land stability of Venice
IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH, 2001Co-Authors: T. Strozzi, L. Tosi, P. Teatini, U. Wegmuller, L. Carbognin, C. Werner, A. WiesmannAbstract:The city of Venice is very vulnerable to loss in land elevation as a result of subsidence and Eustacy because of its small elevation above sea level. The alarm of the scientific community related to this persistent problem is increasing because of the forecasts of sea level rise caused by global warming. In order to evaluate the present relative settlement of Venice, a study has been performed by combining high precision levelling surveys and SAR interferometry. The analysis points out at an unprecedented detail the present ground stability of the city.
David T. King - One of the best experts on this subject based on the ideXlab platform.
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Depositional Sequence Analysis and the Characteristics of some Confined Clastic Aquifers, Upper Cretaceous, Alabama
1993Co-Authors: David T. KingAbstract:ABSTRACT In central and eastern Alabama, thirteen Upper Cretaceous (late Santonian to latest Maastrichtian; 85 to 67 Ma) depositional sequences are recognized in the outcropping marine section. Analysis of depositional-sequence paleogeography and the facies relations within depositional sequences (both highstand systems tracts and transgressive systems tracts) permits successful prediction of intrasequence primary permeability, i.e., confined clastic-aquifer distribution. The inferred paleogeographic changes in both gross depositional-strike mode and specific latitudinal position of shoreline trend are directly related, respectively, to second- and third-order changes of sea level. The third-order sea-level changes are eustatic in origin with minor exceptions. Owing to relative tectonic stability of the Gulf passive margin over the Late Cretaceous, Eustacy has played a major role in depositional sequence development and thereby promoted a consistent and relatively predictable pattern in the paleogeographic distribution of the constituent confined clastic aquifers.
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Eustatic and Tectonic Effects within Sequence Stratigraphy of the Outcropping Paralic-Marine Section, Upper Cretaceous, Alabama
1993Co-Authors: David T. KingAbstract:ABSTRACT In Alabama, Upper Cretaceous depositional sequence stratigraphy has been strongly affected by second-, third-, and fourth-order changes of sea level. In the upper Santonian to uppermost Maastrichtian section (85 to 67 Ma), second- and third-order sea-level changes owing to Eustacy and third- and fourth-order sea-level changes owing to both local and regional tectonic events are recognized. Effects of second-order eustatic change are gross changes in depositional strike and systematic variations maximum clastic sedimentation rate. Effects of third-order eustatic change and local and regional tectonic events are related to directly to depositional sequence development. Fourth-order depositional sequences (episodic parasequences) are related to regional tectonic events. Tectonically affected depositional sequences are delineated by chronocorrelation with independently verified and dated local and regional (plate-wide) episodes of disturbance and comparison with the global synthesis of coeval coastal-onlap depositional sequences.
Yipan Hu - One of the best experts on this subject based on the ideXlab platform.
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osl dating of late holocene coastal sediments and its implication for sea level Eustacy in hainan island southern china
Quaternary International, 2017Co-Authors: Tao Jiang, Tao Yu, Yipan HuAbstract:Abstract Since the sea-level rise is not geographically homogeneous but rather shows great regional differences, optically simulated luminescence using quartz as a natural dosimeter has proved to be a powerful and reliable dating technique to determine depositional ages of young coastal sediments around the world. The samples acquired from one beach ridge and two marine terraces in coastal Hainan Island, southern China are detected OSL dating for the investigation of sea-level changes. The results show: (1) coastal sands in Hainan Island were well bleached before deposition, and the quartz OSL can date coastal sediments younger than 200 years, which could be one of good indicators for paleo relative sea-level highstand records; (2) three coastal sediments with 4 m, 3.7 m, and 2 m higher than present sea-level were deposited at 2.40 ± 0.05 ka, 2.92 ± 0.17 ka, and 4.26 ± 0.10 ka, respectively, which indicate that the height of highstand relative sea-level are higher than both mean global sea-level Eustacy and those records offshore southern China; (3) Comparisons with tropical cyclones observations around South China Sea indicates that the late Holocene coastal sediments of Hainan Island might have been reformed by tropical cyclones with a highstand sea-level.
