Cansiglio Karst Plateau: 10 Years of Geodetic–Hydrological Observations in Seismically Active Northeast Italy

Grillo, Barbara; Braitenberg, Carla; Nagy, Ildiko' Erzsebet; Devoti, R.; Zuliani, David; Fabris, Paolo

doi:10.1007/s00024-018-1860-7

Cited by 10 publications

(5 citation statements)

References 22 publications

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“…It is part of the prealpine belt in the Italian Southeastern Alps (Figure 1), located at the convergence between the Adriatic and Eurasian plates (Serpelloni et al., 2016). This area has already been the subject for tectonic deformation (Anderlini et al., 2020), hydrological cycle (Filippini et al., 2018; Grillo et al., 2019; Pintori et al., 2021), and seismicity studies (Anselmi et al., 2011; Chiaraluce et al., 2009; Danesi et al., 2015). The map in Figure 1 shows the location of the major thrusts and fissured‐karst aquifers (Bundesanstalt für Geowiβenschaften und Rohstoffe, 1970) in the study area.…”

Section: Introductionmentioning

confidence: 99%

Hydrological Effects on Seismic‐Noise Monitoring in Karstic Media

Vidal

Zaccarelli

Pintori

et al. 2021

Geophysical Research Letters

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Fluctuations in groundwater content produce changes in strain loading of the Earth's crust causing transient episodes of surface deformation that can be precisely measured by geodetic techniques (Devoti et al., 2015;Silverii et al., 2016). These surface-deformation signals have traditionally been the target of geodetic measurements to study the changes in the Earth's crust and eventually changes in groundwater. At the same time, groundwater-content variations also generate temporal alterations in the elastic properties of the subsurface. Since the propagation of seismic waves can be sensitive to the presence of fluids in the medium, seismological measurements emerge as an alternative to monitor the groundwater-content variations in the Earth's crust (

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Section: Introductionmentioning

confidence: 99%

Hydrological Effects on Seismic‐Noise Monitoring in Karstic Media

Vidal

Zaccarelli

Pintori

et al. 2021

Geophysical Research Letters

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“…We find that during floods the soil is uplifted by a few mm and displaced horizontally and tilted close to the same direction. The movement induced by hydraulic flow is typical to karst systems and the relatively large signal has been noted with GPS, tilt, extensometric and gravity measurements 18,20–22 .…”

Section: Resultsmentioning

confidence: 91%

Terrain uplift due to natural hydrologic overpressure in karstic conduits

Braitenberg

Pivetta

Barbolla

et al. 2019

Sci Rep

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Water supply from karst sources is a worldwide natural resource and the exploitation is tied to the knowledge of the positions of the hydrologic channels. We show that surface deformation induced by flood events in karst conduits is observable, and consists in uplift and outward movement from the hydraulic channel. Precipitation events produce the natural occurrence of subsurface hydraulic overpressure up to 1 MPa. Numerical modeling shows that the stresses are so strong to uplift and dislocate the surface by several mm and induce tilts in the order of microradians. The naturally induced deformation is compatible with a transient internal pressure loading of a channel. The results can be used to find new channels with dense GNSS networks. Sea water incursion and channels accessed for tourism could be monitored. Seismicity has been shown to have a seasonal variation in some areas, which could be explained by the subsurface stresses induced by the natural subsurface overpressure. The pressure induced deformation is expected to be observed in all karstic systems worldwide.

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“…I wonder also whether flow measurements of springs or a river are available which could be a proxy for the underground storage system, also if tens of km distant from the gravity campaign site. The geodetic observations of gravity (Champollion et al, 2018;Van Camp et al 2006) and of tilt (Grillo et al 2018, Tenze et al 2012, Devoti et al 2015 in different karstic areas showed good correlation to rainfall, springs and river, as these last drain the karstic storage and thus are a proxy for the hydrologic mass variations. Since the hydrologic mass variation is crucial in the estimate of the anticipated subsoil erosion, this point could be investigated further in the manuscript.…”

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confidence: 92%

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Braitenberg¹

2018

Preprint

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The working hypothesis of this fine example of repeated gravity measurements is, that the mass loss accompanying the formation of cavities is measurable. The measurement campaign is carried out over four years (2014-2018) in a karst area in Germany affected by the formation of sinkholes and active ground subsidence. These bear a hazard to the buildings and infrastructure, as suddenly the roof of the cavities can collapse creating a hole of many meters depth and bringing down buildings or streets located above the cave. The subsidence is documented by a precise repeat levelling C1

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Cansiglio Karst Plateau: 10 Years of Geodetic–Hydrological Observations in Seismically Active Northeast Italy

Cited by 10 publications

References 22 publications

Hydrological Effects on Seismic‐Noise Monitoring in Karstic Media

Hydrological Effects on Seismic‐Noise Monitoring in Karstic Media

Terrain uplift due to natural hydrologic overpressure in karstic conduits

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