Water storage mapping of pyroclastic covers through electrical resistivity measurements |
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| Authors: | R Di Maio E Piegari |
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| Institution: | aDipartimento di Scienze della Terra, Università di Napoli "Federico II", Largo S. Marcellino 10, 80138 Napoli, Italy |
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| Abstract: | The knowledge of the geological setting of pyroclastic covers and their water content distribution represents crucial information for stability analyses of slopes potentially subject to debris-flow phenomena. The study we here present would provide a contribution to this issue by means of an approach based on electrical resistivity measurements. Specifically, we describe the results of high-resolution 2D resistivity surveys carried out in a test area on Sarno Mountains (Campania Region – Southern Italy), where shallow landslides involving pyroclastic soils periodically occur triggered by critical rainfall events. We discuss the results in relation to the geology of the area in order to locate characteristic horizons of pyroclastic soils below the ground surface. Then, on the basis of a laboratory characterization of pyroclastic samples collected from the same test area at representative depths, we provide an estimation of the soil water content distribution in the field. Finally, we analyze temporal variations of the soil water content distribution by comparing the data of two surveys carried out in the autumnal and spring seasons, respectively. |
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| Keywords: | ERT surveys Pyroclastic covers Water storage mapping Laboratory resistivity characterization |
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