Preliminary groundwater modelling by considering the interaction with superficial water: Aosta plain case (northern Italy)

Tullia Bonomi, Letizia Fumagalli, Valeria Benastini, Marco Rotiroti, Pietro Capodaglio, Fulvio Simonetto
  • Tullia Bonomi
    Università degli Studi di Milano-Bicocca, Dipartimento di Scienze dell’Ambiente e del Territorio e di Scienze della Terra, Milano, Italy | tullia.bonomi@unimib.it
  • Letizia Fumagalli
    Università degli Studi di Milano-Bicocca, Dipartimento di Scienze dell’Ambiente e del Territorio e di Scienze della Terra, Milano, Italy
  • Valeria Benastini
    Università degli Studi di Milano-Bicocca, Dipartimento di Scienze dell’Ambiente e del Territorio e di Scienze della Terra, Milano, Italy
  • Marco Rotiroti
    Università degli Studi di Milano-Bicocca, Dipartimento di Scienze dell’Ambiente e del Territorio e di Scienze della Terra, Milano, Italy
  • Pietro Capodaglio
    Agenzia Regionale per la Protezione dell’Ambiente della Valle d’Aosta, Sezione ASSC, Italy
  • Fulvio Simonetto
    Agenzia Regionale per la Protezione dell’Ambiente della Valle d’Aosta, Sezione ASSC, Italy

Abstract

The study is developed through scientific cooperation between the University of Milano-Bicocca and the Regional Agency for Environmental Protection (ARPA) of the Valle d’Aosta Region. Its aim is to produce a decision-support tool to help the Public Administration’manage groundwater and public water supply. The study area is the plain of Aosta, between the cities of Aymavilles and Brissogne; in this area groundwater represents the main source of public water supply. The valley is oriented east-west, along the Baltea for a length of 13.1 km and a width of 4.6 km. The textural and hydrogeological properties of the deposits are strictly connected to glacial deposition and to the subsequent sedimentary processes which took place in glacial, lacustrine and fluvial systems. The study is based on available well information in the Aosta plain - including water wells (133) and piezometers (121) - which have been coded and stored in the well database TANGRAM,. The database facilitates interpretation of the well data, and it allows three-dimensional mapping of subsurface hydrogeological characteristics through database codification and ordinary kriging interpolation. The study is designed to achieve two objectives. The first is to provide the Aosta Public Authorities with a well database in order to simplify groundwater management. The second is to provide Public Authorities with a groundwater flow model of the local aquifer. The model integrates surface and subsurface flows in order to fully account for all important stresses, both natural and anthropogenic, on the groundwater system. It provides a tool for testing hypotheses (such as the impact of new wells) and thereby allows science-based management of the aquifer resource.

Keywords

Aosta valley, stationary flow model, Modflow, SFR2 package, Hydraulic Conductivity, well database

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Submitted: 2016-03-14 16:06:39
Published: 2013-03-30 00:00:00
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Copyright (c) 2016 Tullia Bonomi, Letizia Fumagalli, Valeria Benastini, Marco Rotiroti, Pietro Capodaglio, Fulvio Simonetto

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