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Volume 22, issue 10 | Copyright
Hydrol. Earth Syst. Sci., 22, 5211-5225, 2018
https://doi.org/10.5194/hess-22-5211-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 11 Oct 2018

Research article | 11 Oct 2018

Numerical modeling of flow and transport in the Bari industrial area by means of rough walled parallel plate and random walk models

Claudia Cherubini1,2, Nicola Pastore3, Dimitra Rapti4, and Concetta I. Giasi3 Claudia Cherubini et al.
  • 1Department of Physics & Earth Sciences, University of Ferrara, Via Saragat 1-, 44122, Ferrara, Italy
  • 2School of Civil Engineering, University of Queensland, St Lucia, Brisbane 4072, Australia
  • 3DICATECh, Department of Civil, Environmental, Building Engineering, and Chemistry, Politecnico di Bari, Bari, Italy
  • 4New Energies And environment Company (NEA) Via Saragat 1-, 44122 Ferrara, Italy

Abstract. Modeling fluid flow and solute transport dynamics in fractured karst aquifers is one of the most challenging tasks in hydrogeology.

The present study investigates the hotspots of groundwater contamination in the industrial area of Modugno (Bari – southern Italy), where the limestone aquifer has a fractured and karstic nature.

A rough walled parallel plate model coupled with a geostatistical analysis to infer the values of the equivalent aperture has been implemented and calibrated on the basis of piezometric data. Using the random walk theory, the steady-state distribution of hypothetical contamination with the source at the hotspot has been carried out, reproducing a pollution scenario which is compatible with the observed one. From an analysis of the flow and transport pattern it is possible to infer that the anticline affecting the Calcare di Bari formation in direction ENE–WSW influences the direction of flow as well as the propagation of the contaminant.

The results also show that the presence of nonlinear flow influences advection, in that it leads to a delay in solute transport with respect to the linear flow assumption. This is due to the non-constant distribution of solutes according to different pathways for fractured media which is related to the flow rate.

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The present study investigates the hotspots of groundwater contamination in the industrial area of Modugno (Bari – southern Italy) where the limestone aquifer has a fractured and karstic nature. The characterization of the dynamics of fluid flow and solute transport in fractured aquifers is of broad concern worldwide, especially when considered in relation to water resource exploitation, because fractured aquifers serve as the primary source of drinking water for many areas of the world.
The present study investigates the hotspots of groundwater contamination in the industrial area...
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