Sea-level rise and potential drowning of the Italian coastal plains: Flooding risk scenarios for 2100

Antonioli, Fabrizio; Anzidei, Marco; Amorosi, Alessandro; Presti, Valeria Lo; Mastronuzzi, Giuseppe; Deiana, Giacomo; Falco, Giovanni De; Fontana, Alessandro; Fontolan, Giorgio; Lisco, Stefania; Marsico, Antonella; Moretti, Massimo; Orrù, Paolo; Sannino, Gianmaria; Serpelloni, Enrico; Vecchio, A.

doi:10.1016/j.quascirev.2016.12.021

Cited by 148 publications

(162 citation statements)

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“…The expected sea level rise by the year 2100 for the study area ranges from 0.54 to 1.3 m (Antonioli et al, 2017;De Falco et al, 2015). This will determine an adaptation of the whole coastal system.…”

Section: Discussionmentioning

confidence: 97%

Biogenic sediments from coastal ecosystems to beach–dune systems: implications for the adaptation of mixed and carbonate beaches to future sea level rise

et al. 2017

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Abstract. Coastal ecosystems produce and store carbonate particles, which play a significant role in the carbonate dynamics of coastal areas and may contribute to the sediment budget of adjacent beaches. In the nearshore seabed of temperate zones (e.g. Mediterranean Sea and South Australia), marine biogenic carbonates are mainly produced inside seagrass meadows. This study quantifies the contribution of biogenic sediments, mainly produced in Posidonia oceanica seagrass meadows and secondarily in photophilic algal communities, to the sediment budget of a Mediterranean beachdune system (San Giovanni beach, western Sardinia, western Mediterranean Sea). A set of geophysical, petrographic and sedimentological data was used to estimate the sediment volume and composition of the beach-dune system as a whole. The San Giovanni beach-dune system contains 3 797 000 ± 404 000 t of sediment, 83 % (3 137 000 ± 404 000 t) of which is located in the coastal wedge, 16 % (619 000 ± 88 000 t) in the dune fields and 1 % (41 000 ± 15 000 t) in the subaerial beach. The sediments are composed of mixed modern bioclastic and relict bioclastic and non-bioclastic grains from various sources. The system receives a large input of modern bioclastic grains, mainly composed of rhodophytes, molluscs and bryozoans, which derive from sediment production of present-day carbonate factories, particularly P. oceanica seagrass meadows. Radiocarbon dating of modern bioclastic grains indicated that they were produced during the last 4.37 kyr. This value was used to estimate the longterm deposition rates of modern bioclastic sediments in the various beach compartments. The total deposition rate of modern bioclastic grains is 46 000±5000 t century −1 , mainly deposited in the coastal wedge (39 000 ± 4 000 t century −1 ) and dunes (7000 ± 1000 t century −1 ), and 46 000 t represents ∼ 1.2 % of the total beach-dune sediment mass. Carbonate production from coastal ecosystems was estimated to be 132 000/307 000 t century −1 , 28 % (15 % / 34 %) of which is transported to the beach-dune system, thus significantly contributing to the beach sediment budget.The contribution to the beach sediment budget represents a further ecosystem service, which our data can help quantify, provided by P. oceanica. The value of this sedimentsupply service is in addition to the other important ecological services provided by seagrass meadows. The dependence of the beach sediment budget on carbonate production associated with coastal ecosystems has several implications for the adaptation of mixed and carbonate beaches to the loss of seagrass meadows due to local impacts and the changes expected to occur over the next few decades in coastal ecosystems following sea level rise.

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Section: Discussionmentioning

confidence: 97%

Biogenic sediments from coastal ecosystems to beach–dune systems: implications for the adaptation of mixed and carbonate beaches to future sea level rise

et al. 2017

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“…The following studies comprise a demonstration site on the North-Eastern coast of Italy, and were carried out in collaboration with local stakeholders: RITMARE Flagship Project (Antonioli et al [8], Bezzi et al [9]), CAMP Italy Project, COASTANCE (Montanari and Marasmi [10]), DELOS, Water 2018, 10, 984 2 of 22 (Zanuttigh et al, [11]) COASTGAP-MED, MEDSANDCOAST-ENPI, COASTAL Mapping-DG MARE, EUROSION [12], THESEUS (Zanuttigh [13]), MICORE (Ciavola et al [14]) or RISC-KIT (Armaroli et al [15]). Specific open-source tools and approaches have been developed to support decision-making processes (Zanuttigh et al [16], Torresan et al [17]; Vafeidis et al [18], van Dongeren et al [19]; Stelljes at al.…”

Section: Introductionmentioning

confidence: 99%

Vulnerability Analysis of the Venetian Littoral and Adopted Mitigation Strategy

Ruol

Martinelli

Favaretto

2018

Water

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This paper discusses the key aspects of the recent Coastal Plan of the Veneto Region (IT). Its aim is to propose a single mitigation strategy for coastal erosion that is valid for the whole Veneto Region, and possibly elsewhere, as well as a method to assign a priority level to any action. The suggested mitigation action against erosion depends on urbanization level, beach width, as well as cross-shore and long-shore sediment transport. The criterion used to give a priority level to mitigation actions is based on a vulnerability index that takes into account erosive tendency, existing coastal flooding hazards, coast value, environmental relevance, tourist pressure, urbanization level, the presence of production activities, and cultural heritage. A sample case featuring the littoral of Rosolina is also provided and includes a site description, the sediment budget, critical issues and possible mitigation measures.

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“…Furthermore, future projections by global and regional climate models indicate an intensification of extreme precipitation events in Italy [2][3][4]. As a consequence of global warming, sea level rise is also expected in the next years in the Mediterranean region [5,6]. Lambeck et al [7] have argued that in the central Tyrrhenian Sea, sea level rise will mainly impact the coasts near Rome.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Assessment of Existing Pumping/Hydraulic Network Systems to Mitigate Flooding in Low-Lying Coastal Regions under Different Scenarios of Sea Level Rise: The Mazzocchio Area Study Case

Cioffi¹,

Trapella²,

Conticello³

2018

Water

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Abstract:Rising of the sea level and/or heavy rainfall intensification significantly enhance the risk of flooding in low-lying coastal reclamation areas. Therefore, there is a necessity to assess whether channel hydraulic networks and pumping systems are still efficient and reliable in managing risks of flooding in such areas in the future. This study addresses these issues for the pumping system of the Mazzocchio area, which is the most depressed area within the Pontina plain, a large reclamation region in the south of Lazio (Italy). For this area, in order to assess climate change impact, a novel methodological approach is proposed, based on the development of a simulation-optimization model, which combines a multiobjective evolutionary algorithm and a hydraulic model. For assigned extreme rainfall events and sea levels, the model calculates sets of Pareto optimal solutions which are obtained by defining two optimality criteria: (a) to minimize the flooding surface in the considered area; (b) to minimize the pumping power necessary to mitigate the flooding. The application shows that the carrying capacity of the hydraulic network downstream of the pumping system is insufficient to cope with future sea level rise and intensification of rainfall.

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Sea-level rise and potential drowning of the Italian coastal plains: Flooding risk scenarios for 2100

Cited by 148 publications

References 55 publications

Biogenic sediments from coastal ecosystems to beach–dune systems: implications for the adaptation of mixed and carbonate beaches to future sea level rise

Biogenic sediments from coastal ecosystems to beach–dune systems: implications for the adaptation of mixed and carbonate beaches to future sea level rise

Vulnerability Analysis of the Venetian Littoral and Adopted Mitigation Strategy

Efficiency Assessment of Existing Pumping/Hydraulic Network Systems to Mitigate Flooding in Low-Lying Coastal Regions under Different Scenarios of Sea Level Rise: The Mazzocchio Area Study Case

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