We test the integration of ground-penetrating radar (GPR) borehole investigation and elec- tromagnetic flowmeter surveys to characterize fissured or complex aquifers. Borehole GPR investiga- tion allows assessment of the lateral continuity of the porous and permeable zones between closely spaced boreholes, whereas flowmeter tests are adopted to identify the inflow–outflow zones in the bore- holes. We apply the coupled approach in a portion (between 10 and 20m below ground surface) of a complex aquifer hosted in a calcareous–gypsiferous formation. The hydro-geophysical characterization was aimed to detect the most conductive levels and to estimate the hydrodynamic properties of the aqui- fer. The integration of single-hole flowmeters and GPR measurements accurately distinguished different productive levels of high porosity and permeability in the aquifer. Two aquifer systems characterized by a complex geometry of fissures and permeable layers have been recognized, establishing the role of the drilled boreholes in the short-circuiting of the two systems. Interpretation of the GPR survey in cross- hole configuration gave values of total porosity of the order of 0.35 and 0.5 in the two more productive levels, which were detected by the flowmeter investigation.

Godio, A., Basiricò, S., Crosta, G., Frattini, P., Villa, A. (2014). Coupling ground-penetrating radar and flowmeter investigations for the characterization of a fissured aquifer. QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY, 47(4), 351-361 [10.1144/qjegh2014-015].

Coupling ground-penetrating radar and flowmeter investigations for the characterization of a fissured aquifer

BASIRICÒ, STEFANO;CROSTA, GIOVANNI;FRATTINI, PAOLO;VILLA, ALBERTO
2014

Abstract

We test the integration of ground-penetrating radar (GPR) borehole investigation and elec- tromagnetic flowmeter surveys to characterize fissured or complex aquifers. Borehole GPR investiga- tion allows assessment of the lateral continuity of the porous and permeable zones between closely spaced boreholes, whereas flowmeter tests are adopted to identify the inflow–outflow zones in the bore- holes. We apply the coupled approach in a portion (between 10 and 20m below ground surface) of a complex aquifer hosted in a calcareous–gypsiferous formation. The hydro-geophysical characterization was aimed to detect the most conductive levels and to estimate the hydrodynamic properties of the aqui- fer. The integration of single-hole flowmeters and GPR measurements accurately distinguished different productive levels of high porosity and permeability in the aquifer. Two aquifer systems characterized by a complex geometry of fissures and permeable layers have been recognized, establishing the role of the drilled boreholes in the short-circuiting of the two systems. Interpretation of the GPR survey in cross- hole configuration gave values of total porosity of the order of 0.35 and 0.5 in the two more productive levels, which were detected by the flowmeter investigation.
Articolo in rivista - Articolo scientifico
Ground-Penetrating Radar, Flowmeter
English
2014
47
4
351
361
none
Godio, A., Basiricò, S., Crosta, G., Frattini, P., Villa, A. (2014). Coupling ground-penetrating radar and flowmeter investigations for the characterization of a fissured aquifer. QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY, 47(4), 351-361 [10.1144/qjegh2014-015].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/60506
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