Venetian Lagoon

This is a large, salty bay.

It is in northern Italy. It is part of the Adriatic Sea.

Many small islands sit in the water. The city of Venice is there.

Most of the area is mud and grass.

The water level can change a lot. Sometimes the water rises very high. This can flood the city of Venice.

People have lived here for a long time. They use the water for fishing. Some people also farm fish.

It is a very special place to see.

The Venetian Lagoon is a large, salty bay in northern Italy.

It sits inside the Adriatic Sea. This lagoon is the largest wetland in the Mediterranean Basin.

Most of the lagoon is made of mud flats and salt marshes. About 80% of the area is these shallow lands. Only 11% is open water. This water moves through canals, which are man-made channels.

Many islands sit in the water. The city of Venice is at the center. Other cities like Chioggia are also there.

The water level changes a lot. Sometimes, the water rises very high. These are called spring tides. In Italy, people call this "acqua alta." This high water can flood Venice.

People have lived here for a very long time. They use the lagoon for fishing and fish farming. Some people also hunt there. Large ships can cause pollution in the water. However, seagrasses are helping to fix the environment by growing back.

The Venetian Lagoon is a large, shallow bay of salt water. It sits in northern Italy within the Adriatic Sea.

This area is the largest wetland in the Mediterranean Basin. The lagoon stretches from the River Sile in the north to the Brenta in the south. It covers a very large surface area. Most of the lagoon is not deep water. About 80% of it is made of mud flats and salt marshes. Only about 11% is open water or canals. These canals are networks of channels that have been dredged.

Water moves into the lagoon through three main inlets. These are named Lido, Malamocco, and Chioggia.

Because it is at the end of a sea, the water level changes often. The most extreme changes are called spring tides. In Italy, people call this high water "acqua alta." This high water can regularly flood much of the city of Venice. The lagoon is also near the Marano-Grado Lagoon. Some people call that area the "twin sister" of the Venice lagoon.

This place was formed about six or seven thousand years ago. It happened after the Ice Age when the sea flooded the coastal plain. Over time, river sediments and sandbars helped shape the land.

People have lived here since ancient times. In the fifth and sixth centuries, the lagoon gave safety to people fleeing invaders. Later, it helped the Venetian Republic grow into a maritime empire. Humans have also changed the lagoon through many projects. They built canals and even made some islands entirely artificial to make them habitable.

Many different islands sit within these waters. Venice is the largest and sits at the center.

Other important islands include Murano, Chioggia, and Burano. Some islands, like the coastal ones, are actually made of dunes. The lagoon is also a place for work. People use it for a seaport, fishing, and fish farming. Some people even go there for hunting.

The lagoon is a busy home for many living things. Bottlenose dolphins sometimes swim in the water to find food.

However, the water faces some hard jobs. Large cruise ships can cause pollution and erosion. In the late 1980s, large blooms of algae were very bad for the area.

Scientists also study how new species enter the sea here. Luckily, seagrasses are growing back to help the ecosystem stay healthy.

The Venetian Lagoon is an enclosed, shallow bay of salt water. It sits in northern Italy within the Adriatic Sea.

This area is the largest wetland in the Mediterranean Basin. It is a complex system of water and land. The lagoon stretches from the River Sile in the north to the Brenta in the south. It covers a massive surface area. About 8% of the lagoon is land. This includes the city of Venice and many smaller islands. About 11% is permanently open water or canals. These canals are a network of dredged channels. The remaining 80% consists of mud flats, tidal shallows, and salt marshes.

Water enters the lagoon through three specific inlets. These inlets are named Lido, Malamocco, and Chioggia.

Because the lagoon sits at one end of a largely enclosed sea, its water levels change often. The most extreme changes are known as spring tides. In Italian, these are called "acqua alta," or high water. These tides regularly flood much of the city of Venice. Nearby is the Marano-Grado Lagoon. It has a surface area of around 230 square kilometers. Some people call it the "twin sister" of the Venice lagoon.

The lagoon formed about six to seven thousand years ago. This happened following the Ice Age. A marine transgression, which is a rise in sea level, flooded the upper Adriatic coastal plain. River sediments helped compensate for the sinking coastal plain. At the same time, coastwise drift from the mouth of the Po River formed sandbars. These sandbars helped close the tidal inlets.

This natural process created the protected environment we see today.

History shows that the lagoon provided great security for people. In the fifth and sixth centuries, it sheltered Romanized people fleeing invaders. These invaders included the Huns and the Lombards. Later, the lagoon helped the Venetian Republic grow. It provided protected conditions for a maritime empire. Humans have also significantly changed the lagoon's appearance. In the fifteenth and sixteenth centuries, Venetian hydraulic projects were started. These projects were designed to stop the lagoon from turning into a marsh. Since the nineteenth century, pumping of aquifers has increased subsidence, which is the sinking of land. Many islands were originally marshy. A gradual drainage programme made them habitable. Some smaller islands are entirely artificial. Some areas around the Mestre seaport are also reclaimed islands.

Many different islands make up this unique landscape.

Venice is the largest island at 5.17 square kilometers. It sits at the center of the lagoon. Other large islands include Sant'Erasmo at 3.26 square kilometers and Murano at 1.17 square kilometers. Chioggia is 0.67 square kilometers. The coastal strip includes islands like Lido, Pellestrina, and Treporti. These are essentially dunes. The lagoon also supports many industries. It serves as a base for the Venetian Arsenal seaport. It is also used for fishing, hunting, and fish farming.

The ecosystem of the lagoon is both diverse and fragile. Bottlenose dolphins occasionally enter the water to feed.

However, pollution is a major concern. Large cruise ships contribute to air and surface-water pollution. They also cause erosion and decreased water quality. In the late 1980s, large phytoplankton and macroalgae blooms occurred. These blooms were particularly devastating. Researchers also note that the lagoon is a primary area for the introduction of non-indigenous species.

Between 1987 and 2003, the lagoon was harmed by changes in nitrogen, organic phosphorus, and organic carbon. Despite these challenges, seagrasses have begun a natural process of recolonization. This helps restore the marine ecosystem.

Today, the lagoon connects many different human and natural systems. Most of the lagoon is within the Metropolitan City of Venice. However, the south-western area belongs to the Province of Padua. The lagoon is a site of both intense human activity and delicate natural processes. It remains a vital part of Italy's geography and history. The balance between the rising sea and the sinking land continues to shape the region.