Integrated geophysical survey in a sinkhole-prone area: Microgravity, electrical resistivity tomographies, and seismic noise measurements to delimit its extension

Abstract Detection, forecasting, early warning, and effective monitoring are key aspects for the delimitation of sinkhole-prone areas and for susceptibility assessment and risk mitigation. To attain these goals, direct and indirect techniques can be employed, and the integration of different indirect/non-invasive geophysical methods including 2D- and 3D-electrical resistivity tomography, microgravity, and single-station seismic noise measures was carried out at “Il Piano” (Elba Island – Italy), where at least nine sinkholes occurred between 2008 and 2014. The most likely origin for these sinkholes had been considered related to net erosion of sediment from the alluvium, caused by downward water circulation between the aquifer hosted in the upper layer (Quaternary alluvial deposits) and that in the lower (Triassic brecciated dolomitic limestone and Cretaceous slate). The integrated geophysical survey, therefore, was carried out a) to differentiate shallower from deeper geological layers, b) to detect possible cavities that could evolve into sinkholes, c) to suggest possible triggers, and d) to delimit the sinkhole-prone area. The results of the integrated geophysical surveys suggest that the study area is mainly characterised by paleochannels, and that the sinkhole-prone area boundaries correspond to these paleochannels.

[1]  E. Intrieri,et al.  Definition of sinkhole triggers and susceptibility based on hydrogeomorphological analyses , 2017, Environmental Earth Sciences.

[2]  Nicola Casagli,et al.  Testing cost-effective methodologies for flood and seismic vulnerability assessment in communities of developing countries (Dajç, northern Albania) , 2016 .

[3]  E. Cardarelli,et al.  Detection and imaging of piping sinkholes by integrated geophysical methods , 2014 .

[4]  Douglas L. Smith.  Application of the pole-dipole resistivity technique to the detection of solution cavities beneath highways , 1986 .

[5]  A. Bitri,et al.  Integrated geophysical approach in assessing karst presence and sinkhole susceptibility along flood-protection dykes of the Loire River, Orléans, France , 2014 .

[6]  R. Carluccio,et al.  Early stage sinkhole formation in the acque albule basin of central Italy from geophysical and geochemical observations , 2015 .

[7]  P. Styles,et al.  The detection of cavities using the microgravity technique: case histories from mining and karstic environments , 1997, Geological Society, London, Engineering Geology Special Publications.

[8]  W. Raymond Griffin,et al.  Residual gravity in theory and practice , 1949 .

[9]  Michael Ezersky,et al.  Geoelectric structure of the Ein Gedi sinkhole occurrence site at the Dead Sea shore in Israel , 2008 .

[10]  Wanfang Zhou,et al.  Effective electrode array in mapping karst hazards in electrical resistivity tomography , 2002 .

[11]  Antonio Galgaro,et al.  Investigations on the structural setting of a landslide-prone slope by means of three-dimensional electrical resistivity tomography , 2015, Natural Hazards.

[12]  Nicola Casagli,et al.  Monitoring of the vibration induced on the Arno masonry embankment wall by the conservation works after the May 25, 2016 riverbank landslide , 2017, Geoenvironmental Disasters.

[13]  F. Gutiérrez,et al.  Sinkhole investigation in an urban area by trenching in combination with GPR, ERT and high-precision leveling. Mantled evaporite karst of Zaragoza city, NE Spain , 2017 .

[14]  F. Gutiérrez,et al.  Paleosubsidence and active subsidence due to evaporite dissolution in the Zaragoza area (Huerva River valley, NE Spain): processes, spatial distribution and protection measures for transport routes , 2004 .

[15]  L. L. Nettleton.  Gravity and magnetic calculations , 1942 .

[16]  Ulrich Polom,et al.  Sinkholes in the city of Hamburg—New urban shear-wave reflection seismic system enables high-resolution imaging of subrosion structures , 2012 .

[17]  Stratos Zacharopoulos,et al.  Guidelines for the implementation of the H/V spectral ratio technique on ambient vibrations measurements, processing and interpretation , 2004 .

[18]  Jorge Pedro Galve,et al.  Application of risk, cost–benefit and acceptability analyses to identify the most appropriate geosynthetic solution to mitigate sinkhole damage on roads , 2012 .

[19]  R. Fanti,et al.  H/V measurements as an effective tool for the reliable detection of landslide slip surfaces: Case studies of Castagnola (La Spezia, Italy) and Roccalbegna (Grosseto, Italy) , 2017 .

[20]  Giuseppe Lombardo,et al.  Evaluation of seismic site response nearby underground cavities using earthquake and ambient noise recordings: A case study in Catania area, Italy , 2011 .

[21]  Gaetano Ranieri,et al.  Three-dimensional Electrical Resistivity Tomography to control the injection of expanding resins for the treatment and stabilization of foundation soils , 2011 .

[22]  G. Ruggieri,et al.  Sericitic alteration at the La Crocetta deposit (Elba Island, Italy): interplay between magmatism, tectonics and hydrothermal activity , 2003 .

[23]  Y Nakamura,et al.  A METHOD FOR DYNAMIC CHARACTERISTICS ESTIMATION OF SUBSURFACE USING MICROTREMOR ON THE GROUND SURFACE , 1989 .

[24]  Deodato Tapete,et al.  An electric and electromagnetic geophysical approach for subsurface investigation of anthropogenic mounds in an urban environment , 2016 .

[25]  Martin G. Culshaw,et al.  Sinkholes and Subsidence: Karst and Cavernous Rocks in Engineering and Construction , 2004 .

[26]  S. Castellaro.  The complementarity of H/V and dispersion curves , 2016 .

[27]  F. Innocenti,et al.  Two-stage growth of laccoliths at Elba Island, Italy , 2002 .

[28]  N. Casagli,et al.  Sinkhole monitoring and early warning: An experimental and successful GB-InSAR application , 2015 .

[29]  G. Berrino,et al.  The new IMGC-02 transportable absolute gravimeter: measurement apparatus and applications in geophys , 2008 .

[30]  Chunho Chang,et al.  Early sinkhole detection using a drone-based thermal camera and image processing , 2016 .

[31]  Nicola Casagli,et al.  Assessing the safety of schools affected by geo-hydrologic hazards: The geohazard safety classification (GSC) , 2016 .

[32]  F. Martínez-Moreno,et al.  Combined microgravity, electrical resistivity tomography and induced polarization to detect deeply buried caves: Algaidilla cave (Southern Spain) , 2013 .

[33]  Helmut Moritz,et al.  Geodetic Reference System 1980 , 1980 .

[34]  A. P. Juan,et al.  Actual extension of sinkholes: Considerations about geophysical, geomorphological, and field inspection techniques in urban planning projects in the Ebro basin (NE Spain) , 2013 .

[35]  Georg Kaufmann,et al.  Geophysical mapping of solution and collapse sinkholes , 2014 .

[36]  V. Pazzi,et al.  Could Ambient Vibrations Be Related to Cerithidea decollate Migration , 2017 .

[37]  V. Bortolotti,et al.  GEOLOGY OF CENTRAL AND EASTERN ELBA ISLAND, ITALY , 2001 .

[38]  E. Forte,et al.  A multidisciplinary approach in sinkhole analysis: The Quinis village case study (NE-Italy) , 2015 .

[39]  J. Wasowski,et al.  What we can learn about slope response to earthquakes from ambient noise analysis: An overview , 2014 .

[40]  V. Tofani,et al.  Spatial modeling of pyroclastic cover deposit thickness (depth to bedrock) in peri‐volcanic areas of Campania (southern Italy) , 2018 .