A structural and geophysical approach to the study of fractured aquifers in the Scansano-Magliano in Toscana Ridge, southern Tuscany, Italy

Francese, Roberto; Mazzarini, Francesco; Bistacchi, A; Morelli, Gabriele; Pasquarè, Giorgio; Praticelli, N.; Robain, Henri; Wardell, N.; Zaja, A.

doi:10.1007/s10040-009-0435-1

Cited by 36 publications

(30 citation statements)

References 13 publications

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“…Because the sandstone outcrops and is unconfined in this area, a significant groundwater body can be presumed to reside within this complex, also taking into account the brittle deformation that may have locally improved the general medium degree of permeability. Indeed, Francese et al (2009) [24] highlighted a complex geometry of the fracture network in the Scansano area, which presents fractures and faults with major NNW-SSE, N-S and E-W trends. Several farm wells already exploit this resource, which is also drained by some springs with average flowrate of the order of 0.5 L/s.…”

Section: Climate Geology and Hydrogeologymentioning

confidence: 99%

“…All other points plotted into the diagram, and representative of groundwater hosted in marly, shelly or alluvial complexes, denote a recharge from average altitudes that are similar to the elevation of the zones in which they are located, thus suggesting that these groundwater flow systems have generally a local importance. Five wells (24,25,45,49,56) even showed δ…”

mentioning

confidence: 99%

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Water Isotopes as Environmental Tracers for Conceptual Understanding of Groundwater Flow: An Application for Fractured Aquifer Systems in the “Scansano-Magliano in Toscana” Area (Southern Tuscany, Italy)

Doveri

Mussi

2014

Water

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Abstract:The "Scansano-Magliano in Toscana" area is characterized by a morpho-structure chiefly made-up by sandstone and shelly-calcareous lithologies. Generally, these complexes host minor aquifers in Tuscany, since they have medium to medium-low permeability. In the area under examination, a sandstone outcrop develops with continuity along the ridge of the structure for several kilometers and above a shelly substratum. Consequently, this hydrostructural context suggested the possibility that a significant groundwater body was hosted in the sandstones. In order to verify this assumption, an isotopic study was carried out taking into account several wells and springs sited on the sandstone outcrop and its surrounding area; the samples collected over a period of two years were analyzed to obtain δ 18 O‰, δ 2 H‰ and 3 H. A study of the hydrostructural and morphological condition was also performed, and minor springs were selected. The analyses of this spring-water resulted in the characterization of the isotopic features of the infiltration water in the studied area, which represents a fundamental base of work for the interpretation of the data of groundwater points which drain long flow paths. By means of this approach, the groundwater framework was defined and the presence of a significant and continuous groundwater body within the sandstone complex was verified. A preliminary conceptual hydrogeological model was also proposed.

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Section: Climate Geology and Hydrogeologymentioning

confidence: 99%

mentioning

confidence: 99%

Water Isotopes as Environmental Tracers for Conceptual Understanding of Groundwater Flow: An Application for Fractured Aquifer Systems in the “Scansano-Magliano in Toscana” Area (Southern Tuscany, Italy)

Doveri

Mussi

2014

Water

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“…However if they are not observable, they have to be detected using geodetic, geotechnical or geophysical methods. Geophysics has not been effective in this case but if the characteristic distance of the fractures were much larger, (about 10 m), Electric Resistivity Tomography was able to detect fractures (Francese et al 2009). The other possibility is to use geoelectric null-arrays (Szalai, Szarka, 2008;Falco et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Delineation of Endangered Areas in a Slowly Moving Landslide by the Pressure Probe Method

Szalai

Wesztergom

Szokoli

2017

Advancing Culture of Living With Landslides

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“…The use of these methods began more than 30 years ago [5] [6] and recent studies indicate that they are quite efficient in the study of fractured aquifers [7] [8] [9]. The use of the heatpulse flowmeter helps to define the direction and velocity of vertical component of the water flow in the borehole, which can be used to obtain hydraulic parameters of transmissivity of fractured aquifers [10] [11] [12].…”

Section: Introductionmentioning

confidence: 99%

Application of Geophysical Logging and Straddle Packers for the Investigation of a Fractured Aquifer in a Contaminated Area by Chlorinated Solvents in Sao Paulo State, Brazil

Fanti¹,

Bertolo²,

Vogado³

et al. 2017

JWARP

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The investigation of contaminated areas in fractured aquifers represents a great technical challenge, due to the frequent conditions of heterogeneity and anisotropy of these environments, which often make it difficult to identify and predict pathways of subsurface contamination. This work aims to contribute to the development of this subject, through the presentation of the results of an investigation in which geophysical logging tools and straddle packers were used, which allowed the development of a more suitable hydrogeological conceptual model of the study area. Two boreholes were drilled and geophysical logging (gamma, caliper and high resolution acoustic televiewer) were used for the geological-structural characterization of the aquifer. Heatpulse flowmeter and straddle packers were then used to obtain data on hydraulic potentials and flows and for the collection of discrete water samples for chemical analysis. Two types of gneiss rocks were identified below the weathering zone (thickness >30 m), one with predominance of mafic bands, more weathered and with a higher fracture density, up to 65 m, and another deeper one, with the predominance of felsic bands. Seven groups of fractures were defined, being those of Group 1, with low dip angles, the most frequent and important for flow until 65 m, and Group 2 (N to NE-SW with high dips to W and NW) more frequent in deeper felsic gneisses. Downward hydraulic potentials were identified down to 65 m and upward potentials from the bottom up to 65 m. A hydraulic test allowed identifying the occurrence of hydraulic connection between the shallow weathering zone and the underlying fractured aquifer.

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A structural and geophysical approach to the study of fractured aquifers in the Scansano-Magliano in Toscana Ridge, southern Tuscany, Italy

Cited by 36 publications

References 13 publications

Water Isotopes as Environmental Tracers for Conceptual Understanding of Groundwater Flow: An Application for Fractured Aquifer Systems in the “Scansano-Magliano in Toscana” Area (Southern Tuscany, Italy)

Water Isotopes as Environmental Tracers for Conceptual Understanding of Groundwater Flow: An Application for Fractured Aquifer Systems in the “Scansano-Magliano in Toscana” Area (Southern Tuscany, Italy)

Delineation of Endangered Areas in a Slowly Moving Landslide by the Pressure Probe Method

Application of Geophysical Logging and Straddle Packers for the Investigation of a Fractured Aquifer in a Contaminated Area by Chlorinated Solvents in Sao Paulo State, Brazil

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