Mobile version

Altimetry helps to monitor the Congo basin

Image of the Month - February 2021

A number of river basins around the world are poorly gauged, for different reasons -- size of the basin, difficulties to reach some places, complexity of the watershed, physical landscape features, geopolitics, funding... The Congo River basin, in Equatorial Africa, is among them, while being the second largest basin on Earth. 
In the meantime, there as in any river basin, estimating the river discharge is of foremost importance for the residents, especially for flood control or mitigation, navigation and other situations where operational monitoring can help informed decision making.

To estimate such discharges in near-real time, a "rain-discharge" hydrological model has been tuned using both Earth Observation satellite products and in-situ data. It was run using satellite précipitation data. The daily discharges hence simulated by the model have been used in conjunction with satellite altimetry to build height - discharge rating curves at more than 500 sites spread all over the basin. These rating curves can now be used to convert automatically any new heights measured in the basin by one of the altimetry missions currently flying (Sentinel-3A & 3B, Jason-3 and soon Sentinel-6 Michael Freilich) into a discharge estimate. These discharge estimates over the Congo basin will be distributed in near-real time on Hydroweb.

The rating curves resulting from this study will also contribute to prepare for Swot, including for the Calval phase, with two track of the fast-sampling orbit crossing over the basin. 

See also:

Other websites on this topic:

Reference:

  • A. Paris, S. Calmant, M. Gosset, A. Fleischmann, T. Conchy, P.-A. Garambois, J.-P.  Bricquet, F. Papa, R. Tshimanga, G. Gulemvuga, V. Siqueira, B. Tondo, R. Paiva, J. Santos da Silva, A. Laraque, 2021: Monitoring hydrological variables from remote sensing and modelling 1 in the Congo River basin, submitted to ,https://doi.org/10.1002/essoar.10505518.1
EnglishFrançaisEspañol
Rss feedsContactSitemapPartnersFAQGlossaryLexiconMobile
You must enable cookies in your browser preferences to save the modifications
You are using an older version of Internet Explorer, please update to take full advantage of Aviso+ features

Customize the home page

View all widgets
-->
Reduce display
Public profile
User profile

Select/Deselect widgets

Discover AVISO+

Customizable home, reading tools, products search guide, etc.. Discover step by step the features of the new site AVISO+.

Customizable homepage

The new home page is composed of blocks called "widgets".

Rearrange the blocks with a "Click & Drop".

Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

Reading tools

Ease your reading by choosing the page background colour (black/white) and/or by modifying the font size.

Browsing menu and breadcrum trail

To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.

Products search guide

The first submenu of the "Data" banner item leads you to a new search form enabling you to find quickier the product that suits your needs. The list of results is updated according to your selection criteria.

AVISO+ Multimedia

The first submenu of the "Multimedia" banner item leads you to AVISO+ collections of images and videos linked to altimetry and its applications. Have a nice visit!