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| Titel |
Modelling tools for managing Induced RiverBank Filtration MAR schemes |
| VerfasserIn |
Giovanna De Filippis, Alessio Barbagli, Chiara Marchina, Iacopo Borsi, Giorgio Mazzanti, Marco Nardi, Thomas Vienken, Enrico Bonari, Rudy Rossetto |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250150285
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| Publikation (Nr.) |
 EGU/EGU2017-14727.pdf |
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| Zusammenfassung |
| Induced RiverBank Filtration (IRBF) is a widely used technique in Managed Aquifer
Recharge (MAR) schemes, when aquifers are hydraulically connected with surface water
bodies, with proven positive effects on quality and quantity of groundwater. IRBF allows
abstraction of a large volume of water, avoiding large decrease in groundwater heads.
Moreover, thanks to the filtration process through the soil, the concentration of chemical
species in surface water can be reduced, thus becoming an excellent resource for the
production of drinking water.
Within the FP7 MARSOL project (demonstrating Managed Aquifer Recharge as a SOLution
to water scarcity and drought; http://www.marsol.eu/), the Sant’Alessio IRBF (Lucca, Italy)
was used to demonstrate the feasibility and technical and economic benefits of managing
IRBF schemes (Rossetto et al., 2015a). The Sant’Alessio IRBF along the Serchio river allows
to abstract an overall amount of about 0.5 m3∕s providing drinking water for 300000 people
of the coastal Tuscany (mainly to the town of Lucca, Pisa and Livorno). The supplied water is
made available by enhancing river bank infiltration into a high yield (10−2 m2∕s
transmissivity) sandy-gravelly aquifer by rising the river head and using ten vertical wells
along the river embankment.
A Decision Support System, consisting in connected measurements from an advanced
monitoring network and modelling tools was set up to manage the IRBF. The modelling
system is based on spatially distributed and physically based coupled ground-/surface-water
flow and solute transport models integrated in the FREEWAT platform (developed within the
H2020 FREEWAT project - FREE and Open Source Software Tools for WATer
Resource Management; Rossetto et al., 2015b), an open source and public domain
GIS-integrated modelling environment for the simulation of the hydrological cycle.
The platform aims at improving water resource management by simplifying the
application of EU water-related Directives and at facilitating the use of modeling
environments and GIS tools for storage, management and visualization of large spatial
datasets.
The groundwater flow and solute transport model was built using FREEWAT, where
MODFLOW-2005 and MT3DMS are integrated. The aquifer of the Sant’Alessio plain was
discretized using square cells 100 m2 wide and two model layers, a silty-sandy superficial
cover and the sandy-gravelly aquifer. Hydraulic connection with the Serchio river and
exploitation of the aquifer through the Sant’Alessio well field were simulated. The aquifer
model layer was further refined to simulate advection, dispersion, sorption and degradation of
contaminants within the river. The objectives are: (i) estimating induced infiltration
rates and travel times, (ii) optimizing groundwater exploitation in complex well
field schemes, (iii) preventing pollution events, (iv) estimating time for remedial
actions.
Acknowledgements
This paper is presented within the framework of the projects FP7 MARSOL and H2020
FREEWAT.
The MARSOL project has received funding from the European Union’s Seventh Framework
Programme for Research, Technological Development and Demonstration under grant
agreement no 619120.
The FREEWAT project has received funding from the European Union’s HORIZON 2020 |
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