1 / 19

SWOT mission, expectation for Tropical hydrology Stéphane CALMANT & Frédérique SEYLER

SWOT mission, expectation for Tropical hydrology Stéphane CALMANT & Frédérique SEYLER Columbus, Ohio, 15-17 Sept 2008. Tropical basins: large (transboundary) braided rivers, changing beds with floodplains and wetlands In practice, impossible to monitor by usual means

sachi
Download Presentation

SWOT mission, expectation for Tropical hydrology Stéphane CALMANT & Frédérique SEYLER

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SWOT mission, expectation for Tropical hydrology Stéphane CALMANT & Frédérique SEYLER Columbus, Ohio, 15-17 Sept 2008

  2. Tropical basins: large (transboundary) braided rivers, changing beds with floodplains and wetlands In practice, impossible to monitor by usual means SWOT: catch every water body

  3. Rivers change course with time… SWOT: full coverage mapping of changes in river course

  4. Low waters High waters SWOT: inundated surfaces

  5. Floodplain under forest Huge volume x Low velocity  River discharge 2 km

  6. Flood plain dynamics Bonnet, M.P, et al. Floodplain hydrology in an Amazon floodplain lake (Lago Grande de Curuaí) Journal of Hydrology

  7. Floodplain vs main stem MS V Flood peak Flood fall Flood increase Low water V= Varzea MS= Main Stream

  8. Drawbacks of conventional nadir altimetry

  9. ENVISAT :hooking For small rivers SWOT: direct measurements

  10. SWOT: no off-nadir ranges ? Leakage/hooking over temporarily islets

  11. SWOT: High resolution of river altitude profile Caqueta River, Colombia Profile from national chart FARCs Guerilla Profile by sat altimetry VB

  12. SWOT: will improve the time and space sampling frequency to input in the modelling schemes

  13. Drawbacks of Gauges: SWOT will provide Complementary information

  14. Data of in situ gauges in international databases (exp Global Runoff Data Center) Date de fin des mesures ●<1980 ●1980-1984 ●1985-1990 ●1990-1994 ●1995-2000 ●2000-2004 ●<2004 NEED FOR A RAPIDE, UNRESTRICTED DISTRIBUTION OF THE SWOT DATA Number of active stations Global Runoff Data Center 1900 1980 2007

  15. Which height variations? Gauge is local SWOT: cross bed slope variations

  16. ANA: Hydrologic network optimization CNPq –UFAM: Sediment transport models CNPq – UnB: Floodplain processes and models ELECTRONORTE: Balbina dam CPRM : Extreme events management and prevision, underground water quality, fluvial geodynamics Long Term AMESD (African Monitoring of the Environment for Sustainable Development ): Congo-Oubangui-Sangha Basin management Future: ACTO - FFEM : Integrated and sustainable water management - AGIRE Madeira dams project

  17. SWOT will provide a full detection of the –now unmonitored- extent and level of each body in the complex river-wetland-inundated areas systems that are characteristic of tropical basins, without harming the temporal sampling, contrarily to conventional nadir altimetry.

More Related