Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Time-lapse Mise-a-la-Masse measurements and modeling for tracer test monitoring in a shallow aquifer |
| Abstract | The main goal of this study is to evaluate the reliability of the Mise-a-la-Masse (MALM) technique associated with saline tracer tests for the characterization of groundwater flow direction and velocity. The experimental site is located in the upper part of the Alento River alluvial plain (Campania Region, Southern Italy). In this paper we present the hydrogeological setting, the experimental setup and the relevant field results. Subsequently, we compare those data against the simulated results obtained with a 3D resistivity model of the test area, coupled with a model describing the Advection - Dispersion equation for continuous tracer injection. In particular, we calculate a series of 3D forward solutions starting from a reference model, all derived from electrical tomography results, but taking into consideration different values of mean flow velocity and directions. Each electrical resistivity 3D model is used to produce synthetic voltage maps for MALM surveys. Finally, the synthetic MALM voltage maps are compared with the ones measured in the field in order to assess the information content of the MALM dataset with respect to the groundwater field characteristics. The results demonstrate that the information content of the MALM data is sufficient to define important characteristics of the aquifer geometry and properties. This work shows how a combination of three-dimensional time-lapse modeling of flow, tracer transport and electrical current can substantially contribute towards a quantitative interpretation of MALM measurements during a saline tracer test. This approach can thus revive the use of MALM as a practical, low cost field technique for tracer test monitoring and aquifer hydrodynamic characterization. (C) 2017 Elsevier B.V. All rights reserved. |
| Source | Journal of hydrology (Amst.) 561, pp. 461–477 |
| Keywords | Geophysical tracer testsMise-a-la-masse methodForward modelingAquifer hydrodynamic characterization |
| Journal | Journal of hydrology (Amst.) |
| Editor | Elsevier, Oxford ;, Paesi Bassi |
| Year | 2018 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.jhydrol.2017.11.013 |
| Authors | Perri, Maria Teresa; De Vita, Pantaleone; Masciale, Rita; Portoghese, Ivan; Chirico, Giovanni Battista; Cassiani, Giorgio |
| Text | 398643 2018 10.1016/j.jhydrol.2017.11.013 ISI Web of Science WOS 000439401800036 Scopus s2.0 85045446486 Geophysical tracer tests Mise a la masse method Forward modeling Aquifer hydrodynamic characterization Time lapse Mise a la Masse measurements and modeling for tracer test monitoring in a shallow aquifer Perri, Maria Teresa; De Vita, Pantaleone; Masciale, Rita; Portoghese, Ivan; Chirico, Giovanni Battista; Cassiani, Giorgio Univ Padua; Univ Naples Federico II; CNR; Univ Naples Federico II The main goal of this study is to evaluate the reliability of the Mise a la Masse MALM technique associated with saline tracer tests for the characterization of groundwater flow direction and velocity. The experimental site is located in the upper part of the Alento River alluvial plain Campania Region, Southern Italy . In this paper we present the hydrogeological setting, the experimental setup and the relevant field results. Subsequently, we compare those data against the simulated results obtained with a 3D resistivity model of the test area, coupled with a model describing the Advection Dispersion equation for continuous tracer injection. In particular, we calculate a series of 3D forward solutions starting from a reference model, all derived from electrical tomography results, but taking into consideration different values of mean flow velocity and directions. Each electrical resistivity 3D model is used to produce synthetic voltage maps for MALM surveys. Finally, the synthetic MALM voltage maps are compared with the ones measured in the field in order to assess the information content of the MALM dataset with respect to the groundwater field characteristics. The results demonstrate that the information content of the MALM data is sufficient to define important characteristics of the aquifer geometry and properties. This work shows how a combination of three dimensional time lapse modeling of flow, tracer transport and electrical current can substantially contribute towards a quantitative interpretation of MALM measurements during a saline tracer test. This approach can thus revive the use of MALM as a practical, low cost field technique for tracer test monitoring and aquifer hydrodynamic characterization. C 2017 Elsevier B.V. All rights reserved. 561 Published version https //www.sciencedirect.com/science/article/pii/S0022169417307679 via%3Dihub Time lapse Mise a la Masse measurements and modeling for tracer test monitoring in a shallow aquifer 1 s2.0 S0022169417307679 main.pdf Articolo in rivista Elsevier 0022 1694 Journal of hydrology Amst. Journal of hydrology Amst. J. hydrol. Amst. Journal of hydrology. Amst. Journal of hydrology Lausanne Amst. Journal of hydrology New York Amst. Journal of hydrology Oxford Amst. Journal of hydrology Shannon Amst. Journal of hydrology Tokyo Amst. ivan.portoghese PORTOGHESE IVAN rita.masciale MASCIALE RITA |