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Welcome on IS OLA (Observatory on LAkes)

The database of the Observatory include all data monitored lakes whatever the theme (phytoplankton, zooplankton, fish, physical chemistry, etc..). The data in presence are on the one hand data as obtained in situ like probe sensors giving data on the depth profiles lake (pH, T °, turbidity, transparency, fluorescence, etc..) and on the other hand data from counts or analyzes obtained in the laboratory from samples. The observation system focuses on long term monitoring, mainly of the peri-alpine lakes which include Lake Geneva, Lake Annecy, Lake Bourget and Lake Aiguebelette, however so concerns small altiutde lakes (sentinel lakes).

IS OLA news
List of observatory sites and variables

How to access data ?

See what data are currently available in the database.

The information system contains data that are freely available and accessible data after validation of a specific request from the responsible scientist. In all cases, you must login before you can query the database and retrieve data for your needs.

How to use the data ?

Access to and use of data from OLA-IS are governed by terms of use that you will have to accept to get an account on the information system.

For more informations about OLA: