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.
[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.
[2][8] In 1560, Cosimo III, a Medici Grand Duke of Florence, agreed with the government of Lucca to dig a new, broader channel for the Serezza, the lake's southern outflow to the Arno.
[2] 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.
[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.
[2] Degradation of the drainage system was hastened by the post-war development of industry and an increase in civil discharge in the region, and by 1967 the area was in danger of reverting to marsh.