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Venice

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Venice weighs Plan B as sea-level rise tests Mose's limits
world1 month ago

Venice weighs Plan B as sea-level rise tests Mose's limits

Venice’s Mose flood barriers have kept the city dry since 2020, but faster sea-level rise is forcing talk of a Plan B. Raised activation levels and staggered closures could harm the lagoon’s ecology and cost hundreds of thousands of euros per operation; the Lagoon Authority is seeking global ideas to reinvent Venice’s future beyond tourism to protect its lagoon and heritage.

Venice under rising seas: can adaptation avert relocation?
climate1 month ago

Venice under rising seas: can adaptation avert relocation?

A new Scientific Reports study evaluates Venice’s options against IPCC sea‑level rise projections and finds no single ‘best’ path. Protective measures like dikes or a wide “super levee” could shield the city up to about 0.5 m of rise at costs ranging from €0.5–4.5 billion (and over €30 billion for a broad barrier), but relocation may be needed beyond 4.5 m of rise after 2300, potentially costing up to €100 billion. Because large defenses take 30–50 years to build, early planning is essential. Venice’s challenges are compounded by its sinking ground (~1 mm/year), storm surges, and the need to balance residents, economy, ecosystems, and heritage in decision making.

Venice at Sea-Level Crossroads: Four Engineering Bets to Save the City
science1 month ago

Venice at Sea-Level Crossroads: Four Engineering Bets to Save the City

European researchers compared four protection strategies for Venice against rising seas—open-lagoon closure with movable barriers, ring dikes, fully enclosing the lagoon by raising barrier islands, or relocating residents and monuments. Their projections show the open-lagoon approach becomes unreliable by around 2300 under even low-emission futures; ring dikes could work but would disrupt lagoon ecosystems and cost €0.5–4.5B; enclosing the lagoon could guard against up to 10 meters of rise but costs €30B+, sacrifices the lagoon ecosystem and port function; relocation is the costliest at about €100B and ends Venice's role as a functioning port. Large-scale projects could take up to 50 years to implement, underscoring the need for early planning.

Venice at the edge: mapping long-term adaptation pathways as sea levels rise
science1 month ago

Venice at the edge: mapping long-term adaptation pathways as sea levels rise

Researchers map how Venice and its lagoon face escalating sea-level rise, outlining four main adaptation paths—open lagoon with MoSE, ring-dikes, closed lagoon, and retreat—showing the adaptation space shrinking with higher seas, identifying tipping points where transitions become unavoidable, and weighing the trade-offs among monuments, lagoon ecosystems, living culture, and the local economy to stress the need for early, coordinated action and large-scale planning to avoid the most disruptive outcomes.

environment3 months ago

Venice Battles an Invasive Sea Walnut Threatening Lagoon and Fisheries

Venice’s lagoon is being invaded by Mnemiopsis leidyi, the warty comb jelly known as the sea walnut, originally from the western Atlantic and now spreading through the Adriatic likely via ballast water and warmer waters linked to climate change. Scientists warn the invasive jellyfish are proliferating, clogging nets and preying on fish eggs, larvae and plankton, which harms the lagoon ecosystem and threatens the region’s multi‑billion‑euro fishing industry as conditions become increasingly favorable for its spread.