Groundwater Flow and Transport Model in Cecina Plain (Tuscany, Italy) using GIS processing

Riccardo Armellini, Elena Baldini, Dario Del Seppia, Fabrizio Franceschini, Natacha Gori, Stefano Menichetti, Stefano Tessitore
  • Riccardo Armellini
    Università di Firenze - Dipartimento di Storia, Archeologia, Geografia, Arte, Spettacolo, Firenze, Italy
  • Elena Baldini
    ARPAT Agenzia Regionale per la Protezione Ambientale della Toscana, Direzione Tecnica, Dipartimenti Pisa e Livorno, Italy
  • Dario Del Seppia
    ARPAT Agenzia Regionale per la Protezione Ambientale della Toscana, Direzione Tecnica, Dipartimenti Pisa e Livorno, Italy
  • Fabrizio Franceschini
    ARPAT Agenzia Regionale per la Protezione Ambientale della Toscana, Direzione Tecnica, Dipartimenti Pisa e Livorno, Italy
  • Stefano Menichetti
    ARPAT Agenzia Regionale per la Protezione Ambientale della Toscana, Direzione Tecnica, Dipartimenti Pisa e Livorno, Italy
  • Stefano Tessitore
    ARPAT Agenzia Regionale per la Protezione Ambientale della Toscana, Direzione Tecnica, Dipartimenti Pisa e Livorno, Italy

Abstract

This work provides a groundwater flow and transport model of trichlorethylene and tetrachlorethylene contamination in the Cecina’s coastal aquifer. The contamination analysis, with source located in the Poggio Gagliardo area (Montescudaio, Pisa), was necessary to optimize the groundwater monitoring and remediation design. The work was carried out in two phases: • design of a conceptual model of the aquifer using GIS analysis of many stratigraphic, chemical and hydrogeological data, collected from 2004 to 2012 in six aqueduct wells; • implementation of a groundwater flow and transport numerical model using the MODFLOW 88/96 and MT3D code and the graphical user interface GroundWaterVistas 5. The conceptual model hypothesizes a multilayer aquifer in the coastal plain extended to the sandy-clay hills, recharged by rainfall and by the Cecina River. The aquifer shows important hydrodynamic features affecting both the contamination spreading, due to the presence of a perched and heavily polluted layer separate from the underlying productive aquifer, and the hydrological balance, due to a thick separation layer that limits exchanges between the river and the second groundwater aquifer. The numerical model, built using increasingly complex versions of the initial conceptual model, has been calibrated using monitoring surveys conducted by the Environmental Protection Agency of Regione Toscana (ARPAT), in order to obtain possible forecast scenarios based on the minimum and maximum flow periods, and it is currently used as a tool for decision support regarding the reclamation and/or protection of the aquifer. Future developments will regard the implementation of the multilayer transport model, based on a new survey, and the final coupling with the regional hydrological model named MOBIDIC.

Keywords

geochemical data, database, statistical analysis, geographical information system, geostatistics, groundwater and solute transport modelling

Full Text:

PDF
Submitted: 2014-12-16 13:43:56
Published: 2015-03-30 00:00:00
Search for citations in Google Scholar
Related articles: Google Scholar
Abstract views:
212

Views:
PDF
57

Article Metrics

Metrics Loading ...

Metrics powered by PLOS ALM


Copyright (c) 2016 Riccardo Armellini, Elena Baldini, Dario Del Seppia, Fabrizio Franceschini, Natacha Gori, Stefano Menichetti, Stefano Tessitore

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
 
© PAGEPress 2008-2018     -     PAGEPress is a registered trademark property of PAGEPress srl, Italy.     -     VAT: IT02125780185     •     Privacy