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Daniel de Castro Victoria 1 , dvictori@cenap.br (Presenting)

Recent progress in modeling surface hydrology across the Amazon Basin using a Variable Infiltration Capacity approach. Daniel de Castro Victoria 1 , dvictori@cena.usp.br (Presenting)

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Daniel de Castro Victoria 1 , dvictori@cenap.br (Presenting)

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  1. Recent progress in modeling surface hydrology across the Amazon Basin using a Variable Infiltration Capacity approach Daniel de Castro Victoria1, dvictori@cena.usp.br (Presenting) Jeffrey E. Richey2, Mariza C. Costa-Cabral3, Alailson Venceslau Santiago4, Antonio Roberto Pereira5, Emilio Mayorga2, Reynaldo Luiz Victoria1, Maria Victoria Ramos Ballester1 1 – LGTI - CENA/USP 2 – School of Oceanography - University of Washington 3 – Dep. of Civil Engineering - University of Washington 4 – PPG Física do Ambiente Agrícola - ESALQ/USP 5 – LCE - Esalq/USP

  2. Why daddy, why?!? • LBA – Understand how Amazon works • Hydrology – indispensable for the functioning of the ecosystem • Transport means for biogeochemical cycles - Water caries “stuff” • Deforestation impacts on water cycle • Changes on the biogeochemical cycles • Tooooooo complex. Use of hydrological modeling and coupling with biogeochemical models to better understand functioning of the ecosystem and how it’s affected.

  3. Study Area

  4. Study Area

  5. Hydrology Model – VIC • Variable Infiltration Capacity • For each cell: • Meteorological forcings (precip., max. & min. temperature and wind) • Vegetation distribution (%forest, %pasture …) • Average soil properties • VARIABLE INFILTRATION CURVE, empirical model that describes soil saturation related to soil moisture (calibration) • Biogeochemical model • Results -> Routing Model

  6. Model calibration • Soil depth: 3 layers, down to 3 meters • Variable Infiltration Capacity curve adjustment • Regional vegetation parameters: LAI, albedo, root depth and distribution, etc

  7. 5.0 3.8 May 1995 January 1995 March 1995 2.5 1.2 November 1995 July 1995 September 1995 0 Initial resultsAmazon evaporation (mm)

  8. mm 194 146 97 48 0 Initial resultsAmazon soil moisture

  9. mm 194 146 January 1994 April 1994 97 48 0 July 1994 October 1994 Initial resultsAmazon soil moisture

  10. mm 194 146 April 94 August 94 97 48 0 January 95 September 95 Initial resultsAmazon soil moisture

  11. Initial resultsJi-Paraná: Modeled discharge

  12. 1995 1994 and 1995 Initial resultsJi-Paraná: Modeled discharge

  13. Initial resultsJi-Paraná: Evapotranspiration

  14. Ji-Paraná: Physical template

  15. mm 770 mm 578 165 385 125 192 85 0 45 5 Precipitation Evapotranspiration

  16. Initial resultsJi-Paraná: Soil Moisture

  17. mm 155 mm 1740 122 1438 90 1135 58 832 25 530 Layer 1 Layer 3

  18. Next steps… • Improve calibration • Update vegetation library (MODIS LAI and Albedo) • Extend time period • Improve visualization and analysis tools for the results • Couple with Biogeochemical Model

  19. Acknowledgments

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