Abstract

In the past decade, over-exploitation has led to a de-pletion of water resources, with impact both on quality and quantity. A sustainable groundwater management needs a detailed scientific knowledge of the behaviour of the un-saturated zone. Particularly, the evaluation of the flow-rate in the unsaturated zone is important to estimate the travel time of the infiltrated water in the subsurface and, hence, to assess the recharge rate and groundwater vul-nerability. A quarry of calcarenite near the town of Canosa, in South Italy, has been chosen to perform the field tests using an integrated hydrogeophysical approach, combin-ing infiltrometer measurements with electrical resistivity tomography (ERT). The infiltration data were collected using a metallic infiltrometer ring of 0.5 m in diameter, installed directly on the rock, filled with about 8 L of water. The test was conducted for many hours at falling head condition, and the water level within the ring was measured by means of a pressure transductor and a metric rod fixed to the ring. Simultaneously, electrical resistivity measurements were carried out using "time-lapse" technique, in order to monitor the dynamics of infiltration/redistribution of the water in the unsaturated zone. Hydrogeophysical data have been acquired for sev-eral hours to obtain a reliable hydrogeological model of the subsurface investigated. Field-saturated hydraulic conductivity has been de-termined for the calcarenite, and ERT surveys support these results.

Autore Pugliese

• De Carlo Lorenzo , Caputo Maria Clementina , Masciale Rita

Tutti gli autori

• Caputo M.C.; De Carlo L.; Masciale R.

Titolo volume/Rivista

Fresenius environmental bulletin

Anno di pubblicazione

2012

ISSN

1018-4619

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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