Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9145
AuthorsTosi, Luigi 
Carol, Eleonora 
Da Lio, Cristina 
Donnici, Sandra 
Kruse, Eduardo 
Bassan, Valentina 
Mazzuccato, Andrea 
Fornaro, Elena 
Teatini, Pietro 
TitleSubsoil architecture and morphological setting shaping the saltwater intrusion in the coastal plain south of the Venice lagoon, Italy
Issue Date23-Sep-2014
PublisherUniversidad Nacional del Litoral, Santa Fe, Argentina
URIhttp://hdl.handle.net/2122/9145
KeywordsSaltwater contamination
coastal morphology
hydrogeological structures
Venice
Subject Classification03. Hydrosphere::03.02. Hydrology::03.02.06. Water resources 
AbstractThe southern catchment of the Venice watershed (Italy) is threatened by shallow aquifer and soil salinization. The saltwater may extend inland up to 20 km from the Adriatic coastline and deepen down to some tens of meters. Here, saltwater contamination is driven by other forcing factors than excessive pumping, such as ground elevation, buried geological structures, tide encroachment along watercourses, climate and tide conditions, and drainage practices implemented in reclaimed areas. This work aims to outline a conceptual model of the saltwater contamination highlighting the mechanisms driving the saltwater-freshwater exchanges. Results show that the fresh/salt-water interface depth varies from 1 to 30 m below the ground level and exhibits a significant, mainly seasonal, time variation. The dynamics of the soil salinization process is especially sensitive to changes in river (Brenta, Bacchiglione, Adige, Gorzone) discharges, groundwater and channel levels, which are regulated by a number of pumping stations, and climate conditions. Relict geomorphological features, filled with high permeability sediments, act as preferred pathways for groundwater flow and solute transport. In fact they provide a hydraulic connection between freshwater aquifers and sea, possibly facilitating saltwater intrusion landward or, conversely, acting as reservoir of freshwater provided by precipitation, irrigation, percolation through channel beds.
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