Monitoring the saltwater intrusion by time lapse electrical resistivity tomography: The Chioggia test site (Venice Lagoon, Italy)

Franco, R. de; Biella, Gabriele; Tosi, Luigi; Teatini, Pietro; Lozej, A.; Chiozzotto, B.; Giada, Marco; Rizzetto, Federica; Claude, Christelle; Mayer, Adriano; Bassan, Valentina; Gasparetto-Stori, Giuseppe

doi:10.1016/j.jappgeo.2009.08.004

Cited by 182 publications

(103 citation statements)

References 28 publications

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“…[16] The SkyTEM acquisition in this area superposes with the ground based ERT survey carried out in [de Franco et al, 2009. Despite the fact that some time separates the two surveys, they compare very well identifying the same main conductive and resistive structures (Figures 3a and 3b).…”

Section: Discussionmentioning

confidence: 99%

“…[12] The hydrogeological setting of the study area is known, mainly in the inland part, from researches carried out over the last few years [de Franco et al, 2009]. The mainland is characterized by low-lying farmland, markedly below the mean sea level (3 -4 m) and keep drained by pumping stations.…”

Section: Hydrogeological Settingmentioning

confidence: 99%

“…[13] de Franco et al [2009] investigated the extent of the salt water intrusion in this area using electrical resistivity Figure 1b) and the hydrogeological sketch shows a good correspondence below the farmland down to 50-60 m depth. Below 80-100 m depth, AEM supports the fresh water occurrence in the mainland even if the system is not capable to resolve the lithostratigraphic series.…”

Section: Hydrogeological Settingmentioning

confidence: 99%

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Surface water–groundwater exchange in transitional coastal environments by airborne electromagnetics: The Venice Lagoon example

Viezzoli

Tosi

Teatini³

et al. 2010

Geophysical Research Letters

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[1] A comprehensive investigation of the mixing between salt/fresh surficial water and groundwater in transitional environments is an issue of paramount importance considering the ecological, cultural, and socio-economic relevance of coastal zones. Acquiring information, which can improve the process understanding, is often logistically challenging, and generally expensive and slow in these areas. Here we investigate the capability of airborne electromagnetics (AEM) at the margin of the Venice Lagoon, Italy. The quasi-3D interpretation of the AEM outcome by the spatially constrained inversion (SCI) methodology allows us to accurately distinguish several hydrogeological features down to a depth of about 200 m. For example, the extent of the saltwater intrusion in coastal aquifers and the transition between the upper salt saturated and the underlying fresher sediments below the lagoon bottom are detected. The research highlights the AEM capability to improve the hydrogeological characterization of subsurface processes in worldwide lagoons, wetlands, deltas. Citation: Viezzoli, A., L. Tosi, P. Teatini, and S. Silvestri (2010), Surface water -groundwater exchange in transitional coastal environments by airborne electromagnetics:

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Section: Discussionmentioning

confidence: 99%

Section: Hydrogeological Settingmentioning

confidence: 99%

Section: Hydrogeological Settingmentioning

confidence: 99%

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Surface water–groundwater exchange in transitional coastal environments by airborne electromagnetics: The Venice Lagoon example

Viezzoli

Tosi

Teatini³

et al. 2010

Geophysical Research Letters

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“…In the literature there are many papers [12][13][14][15][16][17][18][19][20][21] concerning the application of the ERT technique to detect the fresh/saltwater sharp interface in groundwater by visualizing the inland zone of saltwater encroachment. Usually ERT is applied to obtain a qualitative result, which is a function of the electrical resistivity contrast between the freshwater and the saltwater contained in the investigated groundwater volume.…”

Section: Introductionmentioning

confidence: 99%

An Integrated Approach Based on Numerical Modelling and Geophysical Survey to Map Groundwater Salinity in Fractured Coastal Aquifers

Masciopinto

Liso

Caputo

et al. 2017

Water

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Abstract:Aquifer over-exploitation may increase coastal seawater intrusion by reducing freshwater availability. Fractured subsurface formations commonly host important freshwater reservoirs along sea coasts. These water resources are particularly vulnerable to the contamination due to seawater infiltration occurring through rapid pathways via fractures. Modeling of density driven fluid flow in fractured aquifers is complex, as their hydrodynamics are controlled by interactions between preferential flow pathways, 3D interconnected fractures and rock-matrix porosity distribution. Moreover, physical heterogeneities produce highly localized water infiltrations that make the modeling of saltwater transport in such aquifers very challenging. The new approach described in this work provides a reliable hydrogeological model suitable to reproduce local advancements of the freshwater/saltwater wedge in coastal aquifers. The proposed model use flow simulation results to estimate water salinities in groundwater at a specific depth (1 m) below water table by means of positions of the Ghyben-Herzberg saltwater/freshwater sharp interface along the coast. Measurements of salinity in 25 boreholes (i.e., salinity profiles) have been used for the model calibration. The results provide the groundwater salinity map in freshwater/saltwater transition coastal zones of the Bari (Southern Italy) fractured aquifer. Non-invasive geophysical measurements in groundwater, particularly into vertical 2D vertical cross-sections, were carried out by using the electrical resistivity tomography (ERT) in order to validate the model results. The presented integrated approach is very easy to apply and gives very realistic salinity maps in heterogeneous aquifers, without simulating density driven water flow in fractures.

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“…Swartz first applied the resistivity method for studying the interface of Hawaii brackish seawater intrusion, and this method was used by many other researchers later [14] [15] [16]. The initial one-dimensional (1D) measurement was developed to two-dimensional (2D) and three-dimensional (3D) measurements gradually [17] analyzed the seasonal changes in the formation resistivity of the coastal regions in Denmark and Italy, respectively [16] [20]. They believed that the formation resistivity was associated with changing environmental factors including the tidal effects.…”

Section: Introductionmentioning

confidence: 99%

Effect of Tides on the Stratigraphic Resistance of the South Coast of the Laizhou Bay

Su¹,

Xu²,

Liu³

et al. 2017

JWARP

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Seawater intrusion is a global environmental problem that is becoming increasingly severe with the overexploitation of underground freshwater in coastal regions and sea-level rise caused by global climate change. Although a series of achievements has been made on seawater intrusion, the role of tidal effects has not been fully revealed. In this paper, a typical case of tidal effects on seawater intrusion is provided. The high-density resistivity method was applied to the high-frequency continuous measurement of the stratigraphic resistance of the south coast of the Laizhou Bay, followed by the panel data analysis method. The results indicate that the formation resistivity in coastal area was affected by the tidal level significantly, particularly in the seawater intrusion channel. The effect of tide on the intensity distribution of formation resistivity was evaluated using this method. Because of the presence of a brine layer in the section, the trends of the tidal level effect on the formation resistivity in the left and right sides of the section were opposite, and the intensity of the effect increased sideways.

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Monitoring the saltwater intrusion by time lapse electrical resistivity tomography: The Chioggia test site (Venice Lagoon, Italy)

Cited by 182 publications

References 28 publications

Surface water–groundwater exchange in transitional coastal environments by airborne electromagnetics: The Venice Lagoon example

Surface water–groundwater exchange in transitional coastal environments by airborne electromagnetics: The Venice Lagoon example

An Integrated Approach Based on Numerical Modelling and Geophysical Survey to Map Groundwater Salinity in Fractured Coastal Aquifers

Effect of Tides on the Stratigraphic Resistance of the South Coast of the Laizhou Bay

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