New evidence on the evolution of the Po-delta coastal plain during the Holocene

Bondesan, M.; Favero, V.; Blasco, María José Viñals

doi:10.1016/1040-6182(95)00012-8

Cited by 100 publications

(63 citation statements)

References 1 publication

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“…Lastly, in the Po River Delta the consolidation due to the anthropogenic loads resting on the land surface superposes to the natural consolidation still ongoing. In fact, this zone developed very recently, during the last few centuries, when a sharp increase in the human intervention (i.e., river diversions, construction of artificial channels and dams, land reclamation) significantly increased the river sediment transport and the delta prograded very rapidly, up to 200 m/yr, with a thick prodelta mud deposition [47]. These muds are characterized by a very high compressibility and low permeability, thus consolidation is still ongoing [11].…”

Section: Multi-band Combined Resultsmentioning

confidence: 99%

Combining L- and X-Band SAR Interferometry to Assess Ground Displacements in Heterogeneous Coastal Environments: The Po River Delta and Venice Lagoon, Italy

et al. 2016

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From leveling to SAR-based interferometry, the monitoring of land subsidence in coastal transitional environments significantly improved. However, the simultaneous assessment of the ground movements in these peculiar environments is still challenging. This is due to the presence of relatively small built-up zones and infrastructures, e.g., coastal infrastructures, bridges, and river embankments, within large natural or rural lands, e.g., river deltas, lagoons, and farmland. In this paper we present a multi-band SAR methodology to integrate COSMO-SkyMed and ALOS-PALSAR images. The method consists of a proper combination of the very high-resolution X-band Persistent Scatterer Interferometry (PSI), which achieves high-density and precise measurements on single structures and constructed areas, with L-band Short-Baseline SAR Interferometry (SBAS), properly implemented to raise its effectiveness in retrieving information in vegetated and wet zones. The combined methodology is applied on the Po River Delta and Venice coastland, Northern Italy, using 16 ALOS-PALSAR and 31 COSMO-SkyMed images covering the period between 2007 and 2011. After a proper calibration of the single PSI and SBAS solution using available GPS records, the datasets have been combined at both the regional and local scales. The measured displacements range from~0 mm/yr down to´35 mm/yr. The results reveal the variable pattern of the subsidence characterizing the more natural and rural environments without losing the accuracy in quantifying the sinking of urban areas and infrastructures. Moreover, they allow improving the interpretation of the natural and anthropogenic processes responsible for the ongoing subsidence.

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Section: Multi-band Combined Resultsmentioning

confidence: 99%

Combining L- and X-Band SAR Interferometry to Assess Ground Displacements in Heterogeneous Coastal Environments: The Po River Delta and Venice Lagoon, Italy

et al. 2016

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“…In this latter area, the salinity in piezometers PZSV3, PZSV4 and PZSV8 is less than what was measured previously (5 % of mean difference -see Tables 1 and 2). After pumping, the salinity varies with respect to the pre-pumping data; in the northern and central part of the forest the differences are minimal, in the northeastern part (piezometers 16,19,20), the salinity decreases after pumping.…”

Section: Measurements At Bottom Of Piezometersmentioning

confidence: 99%

“…Soils are mostly sandy and their specific characteristics depend on morphology and watertable depth. The area stratigraphy is consists of multiple series of transgressive-regressive deposits [17][18][19][20]. These sediments forming the aquifers are composed of clay layers (aquiclude) stratified with sand layers (Figure 3).…”

Section: Settingmentioning

confidence: 99%

Measuring Salinity within Shallow Piezometers:Comparison of Two Field Methods

Balugani¹,

Antonellini²

2010

JWARP

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The objective of this study is to understand the validity of salinity vertical profiles collected from shallow piezometers that are not previously flushed. This study shows that salinity data collected from boreholes are only an average value along the entire screened section of the piezometer. In order to collect data that is representative for the salinity of the adjacent aquifer, a new monitoring strategy has been developed. This strategy includes measurement of the salinity at the top of the watertable in an auger hole which is a shallow boreholes made with an handheld drill. This should be combined with measurements in piezometers that are first flushed to take out stagnant water. From the piezometers on can measure the average salinity of the screened part and the salinity at the bottom of the aquifer. By using this monitoring strategy it is also possible to define where the piezometers screens are located if this is not known beforehand.

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“…From east to west, the major sedimentary units consist of: (i) a wedge of fine-grained (fine sand to silty clays) sediments representative of a shallow marine environment; (ii) littoral sands representative of the foreshore, deep-shore, and the sand dune environments adjacent and inland of the beach. The westernmost portion of the study area is characterized by the presence of clay back-shore lagoon deposits [37,38]. Some continental-type alluvial deposits (clay and silt) overlay the littoral sands and lagoon deposits in the west.…”

Section: Characterization Of the Area Of Interestmentioning

confidence: 99%

Saltwater Intrusion in Coastal Aquifers: A Primary Case Study along the Adriatic Coast Investigated within a Probabilistic Framework

Felisa

Ciriello

Federico

2013

Water

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Abstract:Environmentally sensitive areas along coastlines may be adversely affected by saltwater intrusion (SI), a condition which can be worsened by extensive groundwater extraction. Given the uncertainty of problem parameters, the risk of contamination of the vegetation capture zone needs to be cast in a probabilistic framework. In order to exemplify real situations existing along the Adriatic coast of Emilia-Romagna, a case study involving a pinewood strip and a well field drawing freshwater from an unconfined coastal aquifer was examined. On the basis of a widely adopted sharp interface formulation, key hydrogeological problem parameters were modeled as random variables, and a global sensitivity analysis was carried out to determine their influence on the position of the interface. This analysis utilized an efficient model reduction technique based on Polynomial Chaos Expansion. The risk that saltwater intrusion affects coastal vegetation was then evaluated via a two-step procedure by computing the probability that (i) the leading edge of the saltwater wedge reaches the sensitive area in the horizontal plane, and (ii) the freshwater/saltwater interface reaches the capture zone. The influence of the design parameters of the well field on the overall probability of contamination was investigated, revealing the primary role of the pumping discharge in the examined configuration.

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New evidence on the evolution of the Po-delta coastal plain during the Holocene

Cited by 100 publications

References 1 publication

Combining L- and X-Band SAR Interferometry to Assess Ground Displacements in Heterogeneous Coastal Environments: The Po River Delta and Venice Lagoon, Italy

Combining L- and X-Band SAR Interferometry to Assess Ground Displacements in Heterogeneous Coastal Environments: The Po River Delta and Venice Lagoon, Italy

Measuring Salinity within Shallow Piezometers:Comparison of Two Field Methods

Saltwater Intrusion in Coastal Aquifers: A Primary Case Study along the Adriatic Coast Investigated within a Probabilistic Framework

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