Abstract
The database contains observational daily discharge and water level data deriving from the first measurement (which differs for each region) to the present, with more than 1400 stations. These datasets were collected from multiple data providers within the ADO study region, covering the countries Austria, France, Germany, Italy, Slovenia, and Switzerland. The spanned period is 1869-2021. For some regions in Italy there are records to 2022. The missing data were added to have a continuous time series.