Lago di Bientina
Lago di Bientina | ||
---|---|---|
Primary inflows River Auser | | |
Primary outflows | Canale Imperiale | |
Basin countries | Italy | |
Surface area | 36 km2 (14 sq mi) |
Lago di Bientina, also known as Lago di Sesto, was a lake in Tuscany, Italy. Located to the north of the town of Bientina, between Lucca and Pisa, the lake was historically subject to numerous efforts at drainage due to its tendency to flood. Early attempts at canal-building and drainage in the 16th century were hampered by the lake's connection with the Arno River, which often led to backflow and even increased flooding.
In the 19th century, by order of
Geography
The lake lay in a broad valley between two sets of hills, the Monte Pisano to the west and the Monte Carlo to the east. From antiquity, Lago di Bientina had two sections – a large area of permanent water towards the north, known as the Chiaro, and a marshy area towards the south that drained in the dry season, known as the Padule.[1][2] Due to the shallowness of the valley, Lago di Bientina's size varied widely from season to season, from 16 km2 (6.2 sq mi) during times of severe drought to 96 km2 (37 sq mi) during floods.[2] At its average area of 36 km2 (14 sq mi), it was the largest lake in Tuscany.[3]
The lake was fed from the north by the
Early history (to 1559)
Several Etruscan tombs have been found in the area which was once covered by the lake, indicating that it may have been at a low level in ancient times.[2] The earliest references to the existence of a lake north of Bientina date back to the 7th century AD. There exist stories of a Roman city named Sextum which was submerged to form the lake,[clarification needed] but there is no documentary evidence of the existence of this city.[1][4] However, it is believed that the Romans built canals to encourage the lake's outward flow and the level of the lake was probably low during the Roman period.[2]
Along the shores of the lake throughout the medieval period was the Abbey of San Salvatore near the town of Sesto. First recorded in the mid-8th century, the Abbey was granted royal immunity[5] by the Holy Roman Emperor Otto III in 996 AD.[6] It controlled widely scattered lands as far as Corsica.[6] However, fishing rights in the lake, especially in the marshy Padule, were controlled by the town of Bientina.[3][1] Throughout the Renaissance and Enlightenment period, the Lago di Bientina marked the boundary between the city-state of Lucca and the Republic of Florence, later replaced by the Duchy of Tuscany.[7]
Drainage efforts (1560–1859)
Due to regular flooding and the fact that the marshy Padule was associated with malaria, discussions regarding improving the drainage of the lake began in the 1500s.
By the 18th century, the population of Tuscany had grown considerably and attention was again given to the project of draining the Lago di Bientina in order to increase the amount of available farmland. Under the direction of Grand Duke Francesco di Lorena, several more channels were dug from the lake to the Arno, designed by engineer and mathematician Leonardo Ximenes. These efforts were spurred on by serious flooding around the lake in 1768, which prompted the Lucchese government to create a commission to address the issue.[10] However, when the Arno flooded, as it did frequently at that time, these channels were liable to backflow and sometimes even led to increased flooding in the area around Lago di Bientina.[7]
At this time the lake was well known for its eels and its large population of waterfowl, especially coots.[11] In 1837, continued disputes between the Lucchese and Florentine governments over fishing rights led the people of Lucca to suggest building a wall to divide the lake in two, but this was never carried out due to its marked impracticality.[2]
In 1852, the Grand Duke Leopold II ordered the construction of a "barrel" or channel beneath the Arno to convey the waters of the Lago di Bientina directly to the sea. This idea had been first proposed in 1699 by an engineer named Ciaccheri, but had not been carried out due to the high cost.[2] Between 1852 and 1859 a new canal, the Canale Imperiale, was dug under the leadership of the engineer Alessandro Manetti. The channel known as La Botte was constructed beneath the Arno, consisting of a double-barreled siphon 250 meters long which was inaugurated in December 1859.[2][12] This largely completed the draining of the Lago di Bientina, circumventing the troublesome Arno altogether and draining the valley of the Lago di Bientina directly to the Ligurian Sea.[13]
Post-drainage history (1860–present)
The drained land was converted to farmland and divided among tenant farmers around the time of
Degradation of the drainage system was hastened by the post-war
References
- ^ a b c d Parenti, Gabriele (17 January 2015). "Between Bientina and Lucca, on the trail of the lost lake". StampToscana (in Italian). Archived from the original on 14 May 2018. Retrieved 13 May 2018.
- ^ ISBN 978-3-8334-2463-2.
- ^ ISBN 8883043286.
- ^ Napolitano, Daniele. "Bientina - The City in the Vanished Lake". www.toscanaovunquebella.it. Regione Toscana. Retrieved 14 May 2020.
- OCLC 12970533.
- ^ ISBN 978-0-521-19346-7.
- ^ a b Magrini, Graziano (30 January 2008). "The former Lake of Bientina". brunelleschi.imss.fi.it (in Italian). Catherine Frost (translator). Archived from the original on 15 May 2018. Retrieved 13 May 2018.
- ^ The Lancet, Volume 2, Part 2. J. Onwhyn. 23 November 1901. p. 1456.
- ^ Pacini, Francesco. "Cartographia Storica Regionale: Scheda dettaglio" [Regional Historical Cartography: details sheet]. www502.regione.toscana.it. Archived from the original on 22 March 2018. Retrieved 13 May 2018.
- ^ a b "Archivio di Stato di Lucca" [Luccha State Archives]. www.archiviodistatoinlucca.beniculturali.it (in Italian). Archived from the original on 14 May 2018. Retrieved 13 May 2018.
- ^ Tozetti, Targione (1792). "Travels in Tuscany". The Monthly Review Or Literary Journal Enlarged. Vol. II. Griffiths. p. 504.
- ^ Palotti, Carlo (17 November 2016). "La Botte, dopo 157 anni resta una delle opere di idraulica più importanti d'Italia e d'Europa. Oggi la visita di Eugenio Giani" [La Botte, after 157 years, remains one of the most important hydraulic works in Italy and Europe. Today Eugenio Giani visited the site.]. Cascina Notizie (in Italian). Archived from the original on 14 May 2018. Retrieved 13 May 2018.
- ^ Cialdi, Alessandro (1857). Sul nuovo emissario del lago di Bientina e sulla botte sotto l'Arno [On the new emissary of Lake Bientina and on the barrel under the Arno.] (in Italian).
- ^ Pacini, Francesco. "Profile of the Sesto or Bientina lake" [Regional Historical Cartography: detail card]. Castore: Cartografia Storica Regionale. Archived from the original on 17 May 2018. Retrieved 17 May 2018.
Further reading
- Barsanti, Danilo & Rombai, Leonardo. The "water war" in Tuscany. History of land reclamation from the Medici to the Agricultural Reform, Florence, Edizioni Medicea, 1986, pp. 63–80. IT 0025727.
- Caciagli, Giuseppe. Lake of Bientina: Historical and hydrogeological events, Pontedera, 1984. IT 0285324.
- Cialdi, Alessandro. On the New Outlet of the Bientina Lake and on the Barrel under the Arno, 1857.
- Fasoli, Patrizia. Reclamation and Agricultural Landscape: Bientina, Museo Galileo Collection, Buti, 1981.
- Rombai, Leondardo. Hydraulic science and water problems in late-eighteenth-century Tuscany in The politics of science: Tuscany and the Italian states in the late eighteenth century, Proceedings of the Conference of Florence 27–29 January 1994, Florence, Leo S. Olschki, 1996, pp. 171–205. IT 0292685.
- Zagli, Andrea. The lake and the community. History of Bientina: a Castle of fishermen in modern Tuscany, Florence, Polistampa, 2001. IT 0379231.