The underwater barriers meant to protect the Italian city of Venice from damaging high tides are a decade behind schedule and billions over budget.
A yellow barrier, part of a plan to protect the city of Venice from flooding, floats on a barge, in Venice, Italy, Friday, Nov. 29, 2019. Central to the plan to protect Venice, some, or all, of the 78 barriers will one day be raised when the sea rises more than 110 centimeters to prevent damaging high tides from pushing into the lagoon city, a UNESCO heritage site built picturesquely but somewhat precariously among more than 120 islands.
In the wake of last month’s flooding of Venice, the worst in 53 years, the consortium that oversees construction of Moses is eager to demonstrate that the project — after years of bad news — is on track and will be fully operational by the end of 2021.A recent test of the deepest expanse of barriers — at the Malamocco entrance to the lagoon — was declared a success by the New Venice Consortium.
Work is continuing largely with the original subcontractors now contracting directly with the consortium, which itself has been placed under government control as a result of the scandal. "Its behavior is not predictable,’’ Vielmo said. He said that the trials so far declared successful have been under only modest sea conditions that fail to represent anywhere near the threat of the phenomenon of extreme oscillation called subharmonic resonance.
The idea behind the project was to create a mobile system that would not impede views of the unique and protected landscape. But Moses has suffered criticism from the start that there were simpler, cheaper systems that could have been deployed. Climate scientists note that exceptional tides — those over 1.4 meters — have become much more frequent in the past two decades, with more than half of all recorded occurring since 2000.
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