Mobile version

Forecasting rivers

 
Altimetry enables to measure river levels at a given point, repeatedly in time. However, what is often more important to people is forecasting level with few days lead time, especially if flood is threatening and if the rivers are not measured by the same organization all along its stream, as it is usually the case when they crosse different countries. Combining Jason-2 Ganges-Brahmaputra levels with a forecasting model can lead to forecast water level 5 days  in advance. A 20-day Jason-2 based forecasting of flooding during Aug 1, 2012 to Aug 20, 2012 was thus demonstrated in a real-time operational environment.

Especially, during the 2013 monsoon period, over 100 day, this forecast system has been tested in a more operational environment (see apps.geoportal.icimod.org/BDFloodforecasting and apps.iwmbd.com/satfor) and results from this test are currently evaluated. The Bangladesh Government is taking over the system from Monsoon 2015 season with a 2014 trial by their forecasting agency – Flood Forecasting and Warning Center (FFWC).

With the future SWOT mission, dedicated data, and especially a more complete coverage will enable such basin-wide monitoring and forecasting, thus helping to reduce the human costs of such flooding.

Accuracy of Jason-2-based 5-day forecast during dry season (left) and Monsoon season (right), in terms of mean error and RMSE of river level, given globally and at each of the 17 river stations (red circles) inside Bangladesh where the official forecasting agency of Bangladesh Government (Flood Forecasting and Warning Center-FFWC) issues forecasts. The major rivers shown here as solid and colored lines are modeled by the hydrodynamic river model HEC-RAS.

See also:

Websites on this subject:

References:

  •  Hossain, F., Siddique-E-Akbor, A. H. M., Mazumdar, L. C., Shah Newaz, S. M., Biancamaria, S., Lee, H., Shum, C. K.. Proof of concept of an operational altimeter-based forecasting system for transboundary flow. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. DOI: 10.1109/JSTARS.2013.2283402
EnglishFrançais
Rss feedsContactPartnersFAQLexiconLegal noticePersonal Data Protection PolicyMobile
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

This 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!