Lake Trasimeno
Encyclopedia
Lake Trasimeno also referred to as Trasimene or Thrasimene in English, is the largest lake on the Italian peninsula
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 south of the Po River
Po River
The Po |Ligurian]]: Bodincus or Bodencus) is a river that flows either or – considering the length of the Maira, a right bank tributary – eastward across northern Italy, from a spring seeping from a stony hillside at Pian del Re, a flat place at the head of the Val Po under the northwest face...

 with a surface area of 128 km2, slightly less than Lake Como
Lake Como
Lake Como is a lake of glacial origin in Lombardy, Italy. It has an area of 146 km², making it the third largest lake in Italy, after Lake Garda and Lake Maggiore...

. No major river flows directly into or out of Lake Trasimeno and the water level fluctuates significantly according to rainfall levels and the seasonal demands from the towns, villages and farms near the shore.

The lake

Trasimeno is shallow, muddy, rich in fish, including pike, carp, and tench. It is 4 meters deep on average. Lake Trasimeno is an endorheic body of water; it is an impounded lake that receives water but has no outlet. Other endorheic bodies of water include the Caspian Sea
Caspian Sea
The Caspian Sea is the largest enclosed body of water on Earth by area, variously classed as the world's largest lake or a full-fledged sea. The sea has a surface area of and a volume of...

, Aral Sea
Aral Sea
The Aral Sea was a lake that lay between Kazakhstan in the north and Karakalpakstan, an autonomous region of Uzbekistan, in the south...

, Utah's Great Salt Lake
Great Salt Lake
The Great Salt Lake, located in the northern part of the U.S. state of Utah, is the largest salt water lake in the western hemisphere, the fourth-largest terminal lake in the world. In an average year the lake covers an area of around , but the lake's size fluctuates substantially due to its...

, and the Dead Sea
Dead Sea
The Dead Sea , also called the Salt Sea, is a salt lake bordering Jordan to the east and Israel and the West Bank to the west. Its surface and shores are below sea level, the lowest elevation on the Earth's surface. The Dead Sea is deep, the deepest hypersaline lake in the world...

. Evaporation can lead to a build up of minerals in the water, resulting in a saline conditions, making these lakes sensitive to pressures from pollution.

The shallow waters meant that malarial mosquitoes prospered. To combat malaria
Malaria
Malaria is a mosquito-borne infectious disease of humans and other animals caused by eukaryotic protists of the genus Plasmodium. The disease results from the multiplication of Plasmodium parasites within red blood cells, causing symptoms that typically include fever and headache, in severe cases...

, some mosquito larvae-eating fish were imported from USA during the 1950s. These fish are widely scattered, and some live in the lakes near Trasimeno. Although billions of larvae are eaten, there are still many mosquitoes and other insects.

Trasimeno water quality is still very good, as a misuration of Italia Nostra showed in 2005. The lack of large farms in the area and a small population means a low pollution level.

A proposal to drain the lake to solve the problems of malaria and depth changes was rejected. At the end of the 19th century, the level changes were solved by building a channel near San Feliciano. This also lessened the malaria problem.

Origins and early history

Three million years ago, there was a shallow sea in this part of Umbria
Umbria
Umbria is a region of modern central Italy. It is one of the smallest Italian regions and the only peninsular region that is landlocked.Its capital is Perugia.Assisi and Norcia are historical towns associated with St. Francis of Assisi, and St...

. A depression formed by geologic fractures allowed the present-day Lake Trasimeno to form.

Historically, Trasimeno was known as The Lake of Perugia
Perugia
Perugia is the capital city of the region of Umbria in central Italy, near the River Tiber, and the capital of the province of Perugia. The city is located about north of Rome. It covers a high hilltop and part of the valleys around the area....

, being important for northwestern Umbria
Umbria
Umbria is a region of modern central Italy. It is one of the smallest Italian regions and the only peninsular region that is landlocked.Its capital is Perugia.Assisi and Norcia are historical towns associated with St. Francis of Assisi, and St...

 and for the Tuscan
Tuscany
Tuscany is a region in Italy. It has an area of about 23,000 square kilometres and a population of about 3.75 million inhabitants. The regional capital is Florence ....

 Chiana
Chiana
Chiana may refer to:* The Chiana Valley in Tuscany and Umbria* Chiana , the river of the Val di Chiana* The fictional character Chiana in TV series Farscape...

 district. In prehistoric times, this lake extended almost to Perugia. Trasimeno is a mythological figure, joined with Agilla, a nymph born in Agello, now a hill midway between Perugia and Trasimeno, formerly an island in the lake.

The Battle of Lake Trasimeno occurred on the northern shore of the lake in April 217 B.C. during the Second Punic War
Second Punic War
The Second Punic War, also referred to as The Hannibalic War and The War Against Hannibal, lasted from 218 to 201 BC and involved combatants in the western and eastern Mediterranean. This was the second major war between Carthage and the Roman Republic, with the participation of the Berbers on...

. The exact location of the battle is unknown because the lake then extended further north; the battle could have been fought between Cortona
Cortona
Cortona is a town and comune in the province of Arezzo, in Tuscany, Italy. It is the main cultural and artistic center of the Val di Chiana after Arezzo.-History:...

 and Tuoro. Near Cortona, there is a place called 'Ossaia'.

The first civilization to inhabit this area was the Etruscans; three of the main Etruscan cities - Perugia, Chiusi, and Cortona - are within 20 km of the lake. Little physical evidence remains from the period of Etruscan or later Roman settlement. Castiglione del Lago
Castiglione del Lago
Castiglione del Lago is a town in the Province of Perugia of Umbria , on the southwest corner of Lake Trasimeno. Orvieto is 59 km south, Chiusi is 21 km to the south west, Arezzo is 56 km to the north west, Cortona is 21 km to the north and Perugia is 47 km to the south...

, has some Roman ruins and its main streets are structured like a chessboard in the Roman style.

Local climate

The Trasimeno climate is quite warm, with moderate winters. Summers can be very warm and humid, but in general the lake moderates the climate both in cold and warm conditions because even shallow water gives a moderate thermic inertia. From May to September, the temperature is warm enough to allow swimming. In 1929, a cold winter froze the whole of the lake's surface, and cars could be driven over the ice. Cold winters in 1957, 1985 and 2002 caused heavy damage to the olive trees nearby. A less severe freeze happened in 1991. This is quite rare, given the latitude of this lake.

Trasimeno has high hills to the east, which help to capture rain and partially protect the lake from cold eastern winds. Most of the water in the lake comes from the network of streams on the western side of the lake.
After World War II, the lake's shores retreated a kilometre in the west; the eastern shore is deeper and more steeply sloped. In the early 1970s, the shore retreated again, by almost as much. In 1990, after a period of abundance, the lake level fell. In 2003, the shore retreated over 100 meters and the level fell 128 cm. The main reason is lack of rain. From 2004 to the summer of 2006, there was plenty of rain (over 150 mm in the last 20 days of August 2005 alone, with over 700 mm to the end of year), but the fall and winter of 2006 were very dry and hot throughout Italy. Despite this, the abundance of water that flowed into Trasimeno in the last 3 years has saved the lake from further problems. Water from the reservoir at Montedoglio in Tuscany to supply agriculture and lakeside towns and thereby eliminate the need to draw water from the lake, was due to open in 2011, but due to the collapse of part of the dam wall the project has been put on hold.

Conservation

The inhabitants of the communes
Comune
In Italy, the comune is the basic administrative division, and may be properly approximated in casual speech by the English word township or municipality.-Importance and function:...

 around Trasimeno and the Umbrian people have successfully protected their lake, whose waters are fit for swimming and whose valleys and islands are intact environments. In 1995 a natural park was established over the entire surface and the shores. A 50 km bicycle path was opened in 2003 around the lake that allows tourists to explore it. There are also cross-country paths, especially over the hills on the eastern side.

The lake’s environs

Half of Trasimeno is surrounded by hills, rich in olives that are an important agricultural resource. On the western shore, near Tuscany, there are vineyards, and fruit and vegetables are grown. The hills are much lower and the climate is warmer. Monte Subasio
Monte Subasio
Mount Subasio is a mountain of the Apennine mountains, in the province of Perugia, Umbria, central Italy. On its slopes are located the ancient towns of Assisi and Spello.The mountain stands about 1290 metres above sea level....

 near Assisi
Assisi
- Churches :* The Basilica of San Francesco d'Assisi is a World Heritage Site. The Franciscan monastery, il Sacro Convento, and the lower and upper church of St Francis were begun immediately after his canonization in 1228, and completed in 1253...

, about 70 km to the east, and Monte Amiata
Monte Amiata
Mount Amiata is the largest of the lava domes in the Amiata lava dome complex located about 20 km NW of Lake Bolsena in the southern Tuscany region of Italy.-Geology:...

, about 70 km to the west, can be seen. The vegetation includes pines, willows and poplars around the shores, many over 30 m tall.

The main towns are Passignano sul Trasimeno
Passignano sul Trasimeno
Passignano sul Trasimeno is a comune in the Province of Perugia in the Italian region Umbria, located about 20 km northwest of Perugia....

, Tuoro, Monte del Lago, Torricella
Torricella
Torricella can refer to the following places in Italy:*Torricella-Taverne*Torricella Sicura*Torricella Verzate*Torricella Peligna*Torricella *Torricella del Pizzo*Torricella in Sabina...

, S.Feliciano, S.Arcangelo, Castiglione del Lago
Castiglione del Lago
Castiglione del Lago is a town in the Province of Perugia of Umbria , on the southwest corner of Lake Trasimeno. Orvieto is 59 km south, Chiusi is 21 km to the south west, Arezzo is 56 km to the north west, Cortona is 21 km to the north and Perugia is 47 km to the south...

, and Borghetto. Castiglione del Lago has the longest shore, being on the only significant peninsula of the lake. This may have been an island that was joined to the shore by the Romans.

Surrounding the lake are old small towns, and isolated castles, like Zocco castle and a tower near Passignano. Monte del Lago was originally built to control the road from Trasimeno to Perugia.

Aviation

The local airport, the Eleuteri, near Castiglione del Lago, was once one of the main aviation schools in Italy, with elegant buildings that were destroyed by retreating German troops in the summer of 1944. This airport was once almost as big as Castiglione. The mild climate and perfect visibility still allow the use of this airport for air meetings.

A social center exists in the former airport. A major watercourse, the Paganico torrent, separated the airport from the town.
Before this airport was constructed, there was a hydroscale in Castiglione del Lago. On the opposite shore, in Passignano, around 10 km away, there was an aircraft factory, the SAI Ambrosini
Ambrosini (aircraft manufacturer)
SAI Ambrosini was an Italian aircraft manufacturer established in Passignano sul Trasimeno, Italy in 1922 as the Società Aeronautica Italiana. It became SAI Ambrosini when it was acquired by the Ambrosini group in 1934. Prior to World War II, the firm built a number of light touring and racing...

. This is now abandoned as an industrial center, but is still used as an association center. It was founded around 80 years ago and the buildings still exist near the Passignano sul Trasimeno
Passignano sul Trasimeno
Passignano sul Trasimeno is a comune in the Province of Perugia in the Italian region Umbria, located about 20 km northwest of Perugia....

 railway station. This company made several types of aircraft, designed by eng. Sergio Stefanutti. Aircraft were tested at Eleuteri airport, only few kilometers away from this factory. SAI was involved mainly with Macchi during World War II. Eleuteri was also used as test center for the Ambrosini SS.4
Ambrosini SS.4
The SAI-Ambrosini SS.4 was an Italian fighter prototype developed in the late 1930s but never mass produced. The radical design for its day featured a canard-style wing layout and a 'pusher' propeller...

, advanced canard aircraft, which crashed in the second flight and the project was abandoned.

Communications

Trasimeno is relatively far from every major Italian city, the nearest of which is Perugia. There was an historic railway built over 100 years ago, with the main rail station in Terontola. Smaller railway stations are in Passignano and Castiglione del Lago.

Because of increased traffic, about 30 years ago a highway was built over the Passignano's road to Perugia. This highway passes near the north and the east shores of Trasimeno and goes to Perugia and Assisi. Many smaller roads, such as the statal 75, are also present, especially on the western side of the lake. The A1 Autostrada passes five kilometers to the west of the Lake.

There are ferryboats, 3 small, 2 medium, and two big (two decks) called Perusia and Agilla II, based in Passignano Port, also two dredges. There are ports in Castiglione del Lago (recently totally rebuilt), S. Arcangelo, S. Feliciano, Tuoro, and several minor anchorages.

Islands

There are three islands in the lake. The largest of these islands is Isola Polvese
Isola Polvese
The Isola Polvese is the largest island of the Lake Trasimeno. This island is a part of Castiglione del Lago.- External links :*...

, almost 1 km2. The second largest, Isola Maggiore
Isola Maggiore
Isola Maggiore is the second largest island on Lake Trasimeno, in Umbria, central Italy. It is a frazione of the comune of Tuoro sul Trasimeno, and is the only inhabited island on the lake, with a current population of 35....

, is the only inhabited one. The small fishing village, which reached its height in the 14th century, today has only around thirty residents. Most of the buildings, including the ruins of a Franciscan
Franciscan
Most Franciscans are members of Roman Catholic religious orders founded by Saint Francis of Assisi. Besides Roman Catholic communities, there are also Old Catholic, Anglican, Lutheran, ecumenical and Non-denominational Franciscan communities....

 monastery, date from the 14th century.

Maggiore is a 'hill', while Polvese is a more complex structure with plains and hills, whilst Minore resembles a sloped table. Minore is now uninhabited, but in the past had a village with over 500 residents. Many centuries ago, a castle with a pentagonal structure stood near the shore, near an Olivetan
Olivetans
The Olivetans, or the Order of Our Lady of Mount Olivet, are a monastic order formally recognised in 1344. They have formed the Olivetan Congregation within the Benedictine Confederation since 1960.-History:...

 monastery. The castle still remains, and the ruins of the church and the monastery are almost totally preserved, despite the abandonment in the 17th century due to malaria. The malaria was eradicated only in the 1950s. There were other problems, since Trasimeno was fought over by Chiusi
Chiusi
Chiusi is a town and comune in province of Siena, Tuscany, Italy.-History:It was one of the more powerful among the Etruscan 12‑city confederation...

, Panicale
Panicale
Panicale is a comune in the Province of Perugia in the Italian region Umbria, located about 25 km southwest of Perugia. As of 31 December 2004, it had a population of 5,623 and an area of 78.8 km²....

, Perugia, and Florence
Florence
Florence is the capital city of the Italian region of Tuscany and of the province of Florence. It is the most populous city in Tuscany, with approximately 370,000 inhabitants, expanding to over 1.5 million in the metropolitan area....

.

Florentine troops demolished Polvese in the 17th century, beginning its decline, until by the 19th century there was only a caretaker. Of the many houses, nothing remains.

Minore Isle, near Maggiore, is now uninhabited, totally covered by local vegetation except for a small anchorage. In ancient times, there was a separation between the two communities, because Polvese was far away from Maggiore-Minore. According to local stories, the two communities fought against each other but the real problems were from the regional 'powers' that fought over this lake for centuries.

A fishing technique, called 'Tuoro' or 'pesca da tuori', was used locally. This complex system consisted of a wooden trap in the water and a circular structure to hold the net around it. The nets trapped the fish that were then taken to the village to be dried. This system worked with a high water level, but was abandoned when the level dropped. A mock up of this system was built several years ago near Polvese Isle's port.

Trasimeno's castles

There are castles all around Trasimeno, many in the center of small towns while others are isolated and in ruins. Castiglione del Lago, Passignano, Magione, Maggiore, and Polvese islands all have castles, while Zocco Castle, Montali Castle, and others are on hilltops.

The Guglielmi Castle in Maggiore Isle was built in the late 19th century on the foundation of an old Franciscan church, and for many years was a popular place in the Trasimeno area. Until 1998 it was still visitable, then it was closed because the structure became dangerous. It is now being restored by a new proprietor, but the work is far from completed.
Between Monte del Lago and S.Feliciano is Zocco castle, ruined for decades. It is privately owned but unmaintained. It is one of the biggest castles of the area and the only one that, inside its sandstone walls, has a still untouched medieval keep. Some years ago it was probably inhabited, as there is a building fitted with a TV antenna, but now its only entry is closed. The best-preserved parts are the eastern and the southern walls, increasingly endangered because the wall's faults are enlarging. The rest of the walls are mostly demolished or have fallen down. One of the southern towers has two enormous cracks in the middle.

The Vernazzano leaning tower, around 20 metres in height, leans like the famous leaning tower of Pisa
Leaning Tower of Pisa
The Leaning Tower of Pisa or simply the Tower of Pisa is the campanile, or freestanding bell tower, of the cathedral of the Italian city of Pisa...

. This unique remnant of an ancient castle was built before 1089, when the Marchiones family donated the whole castle to the monastery of Città di Castello
Città di Castello
Città di Castello is a city and comune in the province of Perugia, in the northern part of the Umbria region of Italy. It is situated on a slope of the Apennines, on the flood plain of the river Tiber. The city is north of Perugia and south of Cesena on the S3bis. It is connected to the A1...

. In 1202, it fell under control of Perugia and this city gained control of Northern Trasimeno. It was built on M.te Castiglione, near two rivers. The castle and the surrounding settlement at Vernazzano, were damaged by wars in 15th century and two centuries later, by a strong earthquake and after-shocks. Erosion of the foundations by water caused the tower to lean in the 18th century. Vernazzano was rebuilt in the valley, away from this site, which had been effective for territorial control but was less well-suited for living in. The Leaning Tower has therefore been abandoned for almost 300 years. To avoid its collapse, a steel reinforcement was recently added, with plates and wires even thicker than 2–3 cm. The Tower is not well known, being located away from the main streets. It is visible from far away, but not easily accessible.

Image gallery

See also

  • Battle of Lake Trasimene
    Battle of Lake Trasimene
    The Battle of Lake Trasimene was a Roman defeat in the Second Punic War between the Carthaginians under Hannibal and the Romans under the consul Gaius Flaminius...

     (in the Second Punic War
    Second Punic War
    The Second Punic War, also referred to as The Hannibalic War and The War Against Hannibal, lasted from 218 to 201 BC and involved combatants in the western and eastern Mediterranean. This was the second major war between Carthage and the Roman Republic, with the participation of the Berbers on...

    )
  • Trasimene Line
    Trasimene Line
    The Trasimene Line was a German defensive line during the Italian Campaign of World War II. It was also sometimes known as the Albert Line...

    , battle in World War II
    World War II
    World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

  • Trasimène
    Trasimène
    Trasimène is the name of a département of the First French Empire in present Italy. It was named after Lake Trasimeno. It was formed in 1809, when the Papal States were annexed by France. Its capital was Spoleto. It was divided into the following arrondissements:* Spoleto* Foligno* Perugia* TodiIt...

    , département of the First French Empire
    First French Empire
    The First French Empire , also known as the Greater French Empire or Napoleonic Empire, was the empire of Napoleon I of France...


External links

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