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Lake Level monitoring based on satellite altimetry

Lake Level monitoring based on satellite altimetry. J-F Crétaux M. Bergé-Nguyen A. Cazenave A. Kouraev. Venice, March13-18, 2006. What can we learn about lakes From altimetry ?. Global point of view. Impact of Climate Global change. Anthropogenic impact. Regional point of view.

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Lake Level monitoring based on satellite altimetry

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  1. Lake Level monitoring based on satellite altimetry J-F Crétaux M. Bergé-Nguyen A. Cazenave A. Kouraev Venice, March13-18, 2006

  2. What can we learn about lakes From altimetry ? Global point of view Impactof Climate Global change Anthropogenic impact Regional point of view • It is needed to identify the: • limitations • Complementary data • End users and interest • Future evolution http://www.legos.obs-mip.fr/soa/hydrologie/hydroweb/

  3. Lake Titicaca

  4. South andean lakes Impact of Southern Oscillation ? Impact of El Nino ? Impact of PDO ? Impact of Glaciar melting?

  5. Altimetry data: for a better understanding of Central Asia water ressources monitoring Chardarya: In situ(black) altimetr(Grey)

  6. Water balance equation: Bathymetry of the Aral Sea: 0 on the map is +53 m above the 0 Baltic sea (Shoreline of Aral in 1962) Set of In situ data, example: Amou Runoff +

  7. BERG STRAIT DIKE REBUILT IN AUGUST 2005 April 14, 1999 April 30, 1999 Small Aral Sea

  8. Scenario of evolution of Small Aral under the situation of dam in the Berg ’s strait for different values of amount of water entering the delta in Kazalinsk

  9. kazalinsk North Aral Chardarya Karakul Toktogul Dam in the Berg Strait: Dv/dt(NAral)+P-E = Rkazalinsk*80% No Dam in the Berg Strait: Dv/dt(NAral)+ P-E = Rkazalinsk*20%

  10. kazalinsk North Aral Chardarya Karakul Toktogul Rivers, Reservoirs, lakes monitoring from combination of In situ And remote sensing: tool for environnemental Studies at the hydrological basin scale, tool for water management

  11. CONCLUSIONS Altimetry is a usefull and promising technique for lake’s monitoring • Precision of few centimeters • multi-year time series availability • observation of large number of lakes • Provide reliable data for water mass balance in remote areas

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