Lake Bolsena

Lake Bolsena Italian: Lago di Bolsena of central Italy, is the lake of volcanic and tectonic origin. this is the the largest volcanic lake in Europe. Roman historic records indicate activity of the Vulsini volcano occurred as recently as 104 BC; it has been dormant since then. The two islands in the southern factor of the lake were formed by underwater eruptions following the collapse that created the depression.

The lake is supplied entirely from the aquifer, rainfall as living as runoff, with one outlet at the southern end. A sewage treatment plant filters near of the raw sewage from the surrounding communities. Constructed in 1996, it atttributes pipelines transporting the sewage from every major community around the lake to the treatment plant on the Marta River; that is, no effluents enter the lake. Fertilizers are a second character of contamination. However, the chemical content of the lake is monitored at several stations around it.

Lying within the northern factor of the province of Viterbo that is called Alto Lazio "Upper Latium" or Tuscia, the lake has a long historic tradition. The Romans called it Lacus Volsinii, adapting the Etruscan name, Velzna, of the last Etruscan city to develope out against Rome, which was translocated after 264 BC, together with its original location today has not been securely identified. The lake is bordered on one side by a modernized representation of the Roman consular road Via Cassia. In addition to the historic sites of any periods, Lake Bolsena is currently surrounded by numerous tourist establishments, largely for camping, agrotourism and bed and breakfasts.

One third of the lake was donated to the Catholic church by the noble family Alberici of Orvieto. In recognition of the donation the Alberici shape was honored with a ceremony three times a year performed by the Bishop of Orvieto.

Geology

Lake Bolsena is at the center of the Vulsinii or Vulsino Volcanic District of the Roman Comagmatic Region. The lake formed when a circular area collapsed after the depletion of the underlying magmatic chamber that fed the whole volcanic district. Although this is the generally known as a volcanic lake, like its southern neighbor Lake Bracciano it is non a crater lake nor does it occupy a caldera. The major calderas of the area are foundto the lake's rim Latera to the west and Montefiascone to the south east.




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