Groundwater Flow Modelling of the Aosta Plain in Northern Italy

Bonomi, T; Fumagalli, Letizia; Rotiroti, Marco; Perego, Rodolfo; Simonetto, Fulvio; Capodaglio, Pietro

doi:10.1007/978-3-319-09054-2_46

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…• è inoltre presente un acquifero profondo di tipo confinato, non sfruttato da prelievi né ad oggi raggiunto da perforazioni, che ha il tetto ad una profondità dal piano campagna che varia da circa 90 m, nella parte orientale, a 140 m, nella parte occidentale (Stefania et al 2018b) ed il letto ad una profondità attualmente non nota; • la separazione tra questi due acquiferi è definita da un acquitardo argilloso-limoso di circa 40 m di spessore, che presenta però delle discontinuità nella zona centroorientale dell'area di studio, dove i due acquiferi sono, localmente, in contatto (Stefania et al 2018b). La falda scorre principalmente in direzione O-E con un gradiente piuttosto regolare (0.4-0.5 %; Bonomi et al 2013), con variazioni stagionali che presentano un minimo invernale/ primaverile e un massimo estivo (Bonomi et al 2015b). Le variazioni stagionali sono visibili in Fig.…”

Section: Inquadramento Idrogeologicounclassified

Assessment of the groundwater quantitative status in the Aosta Plain (North-West Italy): applicability of the national guidelines defined by ISPRA

et al. 2020

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The EU Water Framework Directive requires Member States to assess the quantitative and qualitative status of groundwater bodies and to achieve a good status by 2027. The present study was developed in order to assess the groundwater quantitative status in the Aosta Plain (NW Italy), following the methodology proposed through a guideline defined by the Italian Institute for Environmental Protection and Research (ISPRA), with the aim of supporting local authorities in their periodic assessment of water bodies status. In the study area, during the period 2000-2017, groundwater levels were measured in 213 wells and piezometers. Performing the four tests required by the abovementioned guideline, the quantitative status was assessed on the basis of multi-year groundwater level variations, water balance and the interconnections of groundwater with surface water bodies and groundwaterdependent ecosystems. A good status was assessed for the study area, although some critical aspects emerged from the application of the guideline methodology: the data collected by the monitoring network are not sufficiently robust in terms of sample size, spatial distribution, temporal interval and frequency to fulfill the requirements of the guideline methodology. Therefore, some recommendations to improve the data quality and better address the future assessment of groundwater quantitative status were given.

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Section: Inquadramento Idrogeologicounclassified

Assessment of the groundwater quantitative status in the Aosta Plain (North-West Italy): applicability of the national guidelines defined by ISPRA

et al. 2020

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“…The regional groundwater flow is from west to east following the slope of the valley. The main regional river (Dora Baltea River) flows along the plain from west to east changing from losing to gaining along its path (Bonomi et al, 2015b;Stefania et al, 2018bStefania et al, , 2018c.…”

Section: Study Areamentioning

confidence: 99%

Identification of groundwater pollution sources in a landfill site using artificial sweeteners, multivariate analysis and transport modeling

et al. 2019

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“…Within the study area, this river collects water from 14 tributaries, among which the most important is the Buthier Creek, which crosses the town of Aosta from north to south (Figure 1a). The geological and hydrogeological features of this area were exhaustively described by many previous studies [20][21][22][23][24][25][26][27][28][29][30], so only a brief summary is given in the following. The aquifer system is formed by fluvioglacial, alluvial, lacustrine, and fan deposits, which overlay a deep crystalline basement.…”

Section: Study Areamentioning

confidence: 99%

Numerical Modeling of Remediation Scenarios of a Groundwater Cr(VI) Plume in an Alpine Valley Aquifer

et al. 2018

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This work presents the numerical modeling of remediation scenarios aimed at containing and attenuating the groundwater pollution by Cr(VI) sourced from a steelworks area that affects the Alpine aquifer system in the Aosta Plain (N Italy). Here, groundwater is used for drinking water supply and food and beverage production, so the adoption of remediation works is urgently needed. More specifically, three remediation scenarios were modeled using MODFLOW-2000 and MT3DMS: (a) the activation of a hydraulic barrier to contain the pollution within the source area (Scenario 1); (b) the removal of the pollution sources and the natural attenuation of the residual groundwater plume (Scenario 2); and (c) a combination of the previous two works (Scenario 3). Model results for Scenario 1 showed that a hydraulic barrier composed of five wells located along the eastern border of the steelworks area would contain Cr(VI) concentrations above 5 µg/L (i.e., the Italian regulatory limit) within the steelworks area; the barrier would have a total discharge of 27,500 m 3 /day, which could be compensated by the deactivation of three steelworks wells; the hydraulic barrier would drop the Cr(VI) concentrations below 5 µg/L in the areas downstream of the steelworks after~3 years from its start of operation. Results for Scenario 2 highlighted that the removal of the Cr(VI) sources would drop the Cr(VI) concentrations below 5 µg/L in the areas downstream of the steelworks after~2.5 years, and lead to a full remediation of the Cr(VI) groundwater plume (i.e., total Cr(VI) mass in the aquifer close to zero) after 17 years. Results for Scenario 3 showed that the removal of the Cr(VI) sources accompanied by the activation of the hydraulic barrier would led to a faster remediation within the first 14 years from the starting of the remediation works, with concentrations below 5 µg/L in the areas downstream of the steelworks obtained after~2.3 years.

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Groundwater Flow Modelling of the Aosta Plain in Northern Italy

Cited by 4 publications

References 3 publications

Assessment of the groundwater quantitative status in the Aosta Plain (North-West Italy): applicability of the national guidelines defined by ISPRA

Assessment of the groundwater quantitative status in the Aosta Plain (North-West Italy): applicability of the national guidelines defined by ISPRA

Identification of groundwater pollution sources in a landfill site using artificial sweeteners, multivariate analysis and transport modeling

Numerical Modeling of Remediation Scenarios of a Groundwater Cr(VI) Plume in an Alpine Valley Aquifer

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