Our data base contains time series over water levels of large rivers, lakes and wetlands around the world. These time series are mainly based on altimetry data from Topex/Poseidon for rivers, but ERS-1 & 2, Envisat, Jason-1 and GFO data are also used for lakes. At present, water level time series of about 100 lakes (in Europe, Asia, Africa, North and South America) including Aral & Caspian seas are available. About 250 sites (called virtual stations) on large rivers are also available (see maps below).
Users of the data base can visualize the water level time series as well as Landsat images showing the geographic location of the site. Users can download the numerical values of the time series as well as associated errors.
Theia contact for HydroWeb project : firstname.lastname@example.org
Scientific contact for lakes : email@example.com
Scientific contact for rivers : firstname.lastname@example.org
Name : ERS-1, Topex/Poseidon, ERS-2, GFO, Jason-1, Envisat, Jason-2, Saral/Altika
Imaging mode : Radar altimetry
Spectral bands : Ku band (~ 2 cm wavelength)
Observation capability :
- Swath : 100 to 500 m
- Revisit : 10 to 35 days
- Area : Global
- Period : 1992 to present
The user can display the time series and access the numerical values and associated errors. Data are provided in a text format easy to exploit.
The content of time series is described in the user’s manual for products, accessible under the tab “Links”.
Please quote the following references for any use of these data :
References for river data
- Santos da Silva J., S. Calmant, O. Rotuono Filho, F. Seyler, G. Cochonneau, E. Roux, J. W. Mansour, Water Levels in the Amazon basin derived from the ERS-2 and ENVISAT Radar Altimetry Missions, Remote Sensing of the Environment, 2010, doi:10.1016/j.rse.2010.04.020
- Normandin C., Frappart F., Diepkilé A.T., Marieu V., Mougin E. Blarel F., Lubac B., Braquet N. Ba A. (2018). Evolution of the Performances of Radar Altimetry Missions from ERS-2 to Sentinel-3A over the Inner Niger Delta. Remote Sensing, 10(6), 833, doi: 10.3390/rs10060833
Free pdf downlad here : https://www.mdpi.com/2072-4292/10/6/833(link is external)
References for Lake Data
- Cretaux J-F., Jelinski W., Calmant S., et al., 2011. SOLS: A lake database to monitor in the Near Real Time water level and storage variations from remote sensing data, Advances in space Research, 47, 1497-1507.