Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Calibration of a novel impedance sensor for water content measurement in rocks |
| Abstract | The water content (q) of the subsoil is an important parameter affecting all the processes that occur in the vadose zone, playing a key role in the infiltration, aquifer recharge, and flow and transport of water and substances, as well as groundwater storage. Although the vadose zone is usually considered constituted of soil, it may also be comprised of rock. In the latter case, q cannot yet be operationally measured despite its unquestionable importance. The aim of the present work was therefore to investigate the potential of a novel electrical impedance sensor for q measurement in rocks and to evaluate the effects of frequency and salinity on the calibration of this device. In this study, only the resistance (R), i.e., the real part of the measured impedance, was investigated because of its direct correlation with q. Calcarenite, a sedimentary porous rock, was used for the calibration in the laboratory via the installation of penetration-type probes. The independence of the measured R from the different frequencies set on the device was checked using a statistical approach. The q-R calibration functions obtained for the different saturation solutions have a power-law dependence with a good degree of correlation. The results highlight both the strong reproducibility of the experimental data (by using the penetration-type probes) and the suitability of the device for q measurement in calcarenite. The method could be advantageous for field applications that involve rocks. |
| Source | Vadose zone journal 12 (4), pp. 1–9 |
| Journal | Vadose zone journal |
| Editor | Soil Science Society of America,, Madison, Wis., Stati Uniti d'America |
| Year | 2013 |
| Type | Articolo in rivista |
| DOI | 10.2136/vzj2013.01.0024 |
| Authors | Maria Clementina Caputo Rita Masciale Emanuele Barca |
| Text | 276493 2013 10.2136/vzj2013.01.0024 Scopus 15391663 Calibration of a novel impedance sensor for water content measurement in rocks Maria Clementina Caputo Rita Masciale Emanuele Barca CNR National Research Council, IRSA Water Research Institute The water content q of the subsoil is an important parameter affecting all the processes that occur in the vadose zone, playing a key role in the infiltration, aquifer recharge, and flow and transport of water and substances, as well as groundwater storage. Although the vadose zone is usually considered constituted of soil, it may also be comprised of rock. In the latter case, q cannot yet be operationally measured despite its unquestionable importance. The aim of the present work was therefore to investigate the potential of a novel electrical impedance sensor for q measurement in rocks and to evaluate the effects of frequency and salinity on the calibration of this device. In this study, only the resistance R , i.e., the real part of the measured impedance, was investigated because of its direct correlation with q. Calcarenite, a sedimentary porous rock, was used for the calibration in the laboratory via the installation of penetration type probes. The independence of the measured R from the different frequencies set on the device was checked using a statistical approach. The q R calibration functions obtained for the different saturation solutions have a power law dependence with a good degree of correlation. The results highlight both the strong reproducibility of the experimental data by using the penetration type probes and the suitability of the device for q measurement in calcarenite. The method could be advantageous for field applications that involve rocks. 12 Calibration of a novel impedance sensor for water content measurement in rocks VZJ_2013_.pdf Articolo in rivista Soil Science Society of America, 1539 1663 Vadose zone journal Vadose zone journal Vadose zone j. Vadose zone journal VZJ VZJ online emanuele.barca BARCA EMANUELE mariaclementina.caputo CAPUTO MARIA CLEMENTINA rita.masciale MASCIALE RITA TA.P04.005.008 Integrazione di metodologie per il monitoraggio e la modellizzazione per la gestione delle risorse idriche |