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Article

Sensitivity, Hazard, and Vulnerability of Farmlands to Saltwater Intrusion in Low-Lying Coastal Areas of Venice, Italy

1
Institute of Geosciences and Earth Resources, National Research Council, 30131 Padova, Italy
2
Institute of Marine Sciences, National Research Council, 30122 Venice, Italy
3
Aarhus Geophysics, 56023 Pisa, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Andrzej Wıtkowskı
Water 2022, 14(1), 64; https://doi.org/10.3390/w14010064
Received: 18 November 2021 / Revised: 14 December 2021 / Accepted: 24 December 2021 / Published: 30 December 2021
(This article belongs to the Special Issue Salinization of Water Resources: Ongoing and Future Trends)
Saltwater intrusion is a growing threat for coastal aquifers and agricultural practices in low-lying plains. Most of the farmlands located between the margin of the Southern Venice lagoon and the Northern Po delta, Italy, lie a few meters below mean sea level and are drained by a large network of artificial channels and hydraulic infrastructures to avoid frequent flooding and allow agricultural practices. This work proposes an assessment of the vulnerability to saltwater intrusion, following a new concept of the hazard status, resulting in combining the depth of the freshwater/saltwater interface and the electrical resistivity of the shallow subsoil. The sensitivity of the farmland system was assessed by using ground elevation, distance from freshwater and saltwater sources, permeability, potential runoff, land subsidence, and sea-level rise indicators. Relative weights were assigned by a pairwise comparison following the Analytic Hierarchy Process approach. The computed vulnerability map highlights that about 30% of the farmlands is under strong and extreme conditions, 28% between marginal and moderate, and 40% under negligible conditions. Results from previous vulnerability assessments are discussed in order to explain their differences in terms of hazard status conceptualization and sensitivity characterization of farmland system. View Full-Text
Keywords: saltwater intrusion; salinization hazard; sensitivity indicators; farmland vulnerability saltwater intrusion; salinization hazard; sensitivity indicators; farmland vulnerability
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MDPI and ACS Style

Tosi, L.; Da Lio, C.; Bergamasco, A.; Cosma, M.; Cavallina, C.; Fasson, A.; Viezzoli, A.; Zaggia, L.; Donnici, S. Sensitivity, Hazard, and Vulnerability of Farmlands to Saltwater Intrusion in Low-Lying Coastal Areas of Venice, Italy. Water 2022, 14, 64. https://doi.org/10.3390/w14010064

AMA Style

Tosi L, Da Lio C, Bergamasco A, Cosma M, Cavallina C, Fasson A, Viezzoli A, Zaggia L, Donnici S. Sensitivity, Hazard, and Vulnerability of Farmlands to Saltwater Intrusion in Low-Lying Coastal Areas of Venice, Italy. Water. 2022; 14(1):64. https://doi.org/10.3390/w14010064

Chicago/Turabian Style

Tosi, Luigi, Cristina Da Lio, Alessandro Bergamasco, Marta Cosma, Chiara Cavallina, Andrea Fasson, Andrea Viezzoli, Luca Zaggia, and Sandra Donnici. 2022. "Sensitivity, Hazard, and Vulnerability of Farmlands to Saltwater Intrusion in Low-Lying Coastal Areas of Venice, Italy" Water 14, no. 1: 64. https://doi.org/10.3390/w14010064

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