Venice does not allow water to erase the floating dike system

The famous Italian city of Venice is in danger of being wiped out by sea if there is no proper measure. And Italy has to spend $ 7 billion to protect the city of 60,000 people.

Venice is a city located in a lagoon, consisting of 124 islands. This was an economic center of the world during the Middle Ages with 250,000 inhabitants.

In the past, when there was a flood, the Venetians moved around the city on mobile floors - (Photo: Guardian).

Each year Venice sinks to 0.4mm - the result of excessive groundwater extraction during the 1970s. At the same time, sea water increased by 1.4mm. In total, Venice is sunk below 2mm every year. In total, in the 20th century, Venice fell to 23cm, causing many people to call this "sinking city".

The fact that many houses were damaged and frequent flooding, many people left Venice, leaving the area with only 60,000 inhabitants.

According to the terrain, water from the Adriatic Sea enters into three gates , Lido, Malamoco and Chioggia . Flooding is a normal situation in Venice but the situation is getting worse. In 1966 marked the historic flood when the water rose to 1.94m - 1.5m higher than the normal sea level. And in 1997 alone, Venice suffered a total of 100 small and large floods. With small floods, the Venetians move on temporary mobile floors.

In order to prevent Venice from being destroyed, the Italian Government spent a lot of time approving and spending $ 8 billion to start Mose - a floating sea breakwater - in 2003 at three Lido, Malamoco and Chioggia doors. . By 2015, the project is almost complete.

Lido gate, one of three doors to water from the Adriatic Sea into the lagoon - (Photo: Wiki).

The location is three doors Lido, Malamoco and Chioggia, where 79 gates of Mose construction are installed to block water from the Adriatic Sea into the lagoon - (Photo: Daily Mail).

A total of 79 gates are located at Lido, Malamoco and Chioggia. Each hollow gate is 30m long, 20m wide and 4-5m high. Lido's door is the largest, so it requires 41 gates and an artificial island in the middle.

The work begins with the construction of the foundation, including reinforced concrete bars 38m long, 0.5m in diameter, 20m wide, buried in the seabed. Then, the gates were laid on the sea floor, one end fixed to the foundation with a giant hinge system. Each hinge has CCTV so that engineers can adjust it most accurately.

Normally, water is pumped into the gate, making it close to the seabed. But when the forecast flooded over 1.1m, engineers used pumps to push the water out and replace inside each compressed air gate. Within 30 minutes, light air caused the gate to float up, forming a 45-degree angle barrier to the sea. Each gate can operate independently so this barrier is very flexible.

The building can be operated for 100 years, against waves of up to 3m to protect the city of Venice.

The photo illustrates the operation diagram of the Mose project, drawing the process of gas-pumping gates "getting up" from the sea floor - (Photo: watertechnology)

The Mose project emerges from the sea to block water from the Adriatic Sea into the lagoon - (Photo: Daily Mail).

The gates work independently of each other so they can be flexibly floated - (Photo: Daily Mail).

Not only that, this flexible floating dyke is the solution to protect the marine environment in Venice, while also helping to restore the traditional industries of the city.

The floating dike is only used for a few hours when the sea level rises to help the water flow normally between the lagoon and the Adriatic Sea, so the ecosystem here is almost unaffected.

Meanwhile, keeping Venice always dry helps them grow grapes again. Matteo Bisol, director of the Venissa vineyard on the island of Mazzorbo, said: " In the 19th century, there were many wineries but in 2002, when we decided to restore this profession, there were almost no factories left. Over the past few years, many big floods have come to Venissa but all grapes are alive.