PICTURES FROM ITALY (Est. 2001)
  • Private Tours
    • Private Tours of Rome
    • Private Tours of Florence
    • Private Tours of Venice
  • Contact
  • Rome
  • Vatican
  • Florence
  • Venice
  • Tuscany
  • Gallery
  • Year in Art
Private tours of Venice

Acqua Alta (High Water)

10/6/2019

 
Walking Tours of Venice
Acqua alta in Piazza San Marco, Venice
Acqua alta in Piazza San Marco

Acqua alta (high water) is the term used to describe a tide that is 80 cm above sea level, as measured in 1897. That was the year in which the first gauge for measuring tidal activity was put in place at the Punta della Dogana. Zero on the gauge marks the sea level in 1897. Nowadays, the sea level is at least 23 cm above zero.

Acque alte are officially categorised as: Marea sostenuta (80-109 cm), Marea molto sostenuta (110-139 cm), Alta marea eccezionale (140+ cm). 

An acqua alta of only 80 cm is enough to flood the lowest parts of the city, which also happen to be the busiest, namely the Piazza San Marco and, in particular, the Basilica di San Marco.

In recent years the frequency of acque alte has increased considerably. In 2014 there were 189 cases compared with only 35 in 1983.

The worst ever acqua alta took place on November 4th, 1966, when the water reached a height of 194 cm. 

Acqua Alta, Piazza San Marco, Venice
Acqua alta in Piazza San Marco
Acqua alta, Piazzetta San Marco, Venice
Acqua alta, Piazzetta San Marco

Comments are closed.
    Blogging about Venice:
    ​its art, history & culture. 

    My name is David Lown and I am an art historian from Cambridge, England.

    Since 200I I have been living in Italy, where I run
    ​ private tours of Florence, Rome &
    Venice.

    Search Pictures From Italy:

    Picture

    Blog Posts

    November 2019
    October 2019
    September 2019
    August 2019
    July 2019
    June 2019
    May 2019
    December 2018
    November 2018
    June 2018
    May 2018
    May 2017


Follow Pictures From Italy on Facebook

Private Tours of Rome, Florence & Venice

Copyright © David Lown 2001-2019. All Rights Reserved. 
  • Private Tours
    • Private Tours of Rome
    • Private Tours of Florence
    • Private Tours of Venice
  • Contact
  • Rome
  • Vatican
  • Florence
  • Venice
  • Tuscany
  • Gallery
  • Year in Art