WATER BALANCE OF THE UPPER PARAGUAY BASIN AND ITS RELATIONSHIP WITH HYDROCLIMATOLOGICAL DYNAMICS OF THE PANTANAL WETLAND/BALANCO HIDRICO DA BACIA DO ALTO PARAGUAI E SUA RELACAO COM A DINAMICA HIDROCLIMATICA DO PANTANAL
Water storage in a drainage basin determines its water security. The quantity of water retained in the watershed can be measured by means of the water balance calculation. This balance can be defined by the input of water subtracted from the outputs. However, for the Pantanal, the measurements of wa...
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Veröffentlicht in: | Ra'e ga 2019-09, Vol.46 (3), p.33 |
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Zusammenfassung: | Water storage in a drainage basin determines its water security. The quantity of water retained in the watershed can be measured by means of the water balance calculation. This balance can be defined by the input of water subtracted from the outputs. However, for the Pantanal, the measurements of water inlet and outlet are expensive, which makes the use of remote sensing data a high impact tool with clear socioeconomic advantages. Studies of water availability with orbital sensors are relatively scarce in the Upper Paraguay Basin (BAP). This work is an attempt to estimate the BAP water balance using rainfall and evapotranspiration remote sensing data from the Tropical Rainfall Measuring Mission (TRMM) and the MODIS Global Evapotranspiration Project (MOD16), respectively. The results indicate that BAP had an annual surplus of water between 2000 and 2014, though water parameters seem weakly correlated at annual basis. However, there may be atmospheric-climatic phenomena that maximize the correlation between the hydrological parameters and the temperature anomaly with delays of 2 to 5 years, suggesting lagged teleconnections with QBO and ENSO. Keywords: image processing; Quasi Biennial Oscillation; El Nino - Southern Oscillation; MODIS; TRMM. O armazenamento de agua de uma bacia de drenagem determina a sua seguran?a hfdrica. A quantidade de agua retida na bacia pode ser medida por meio do calculo do balan?o hidrico, definido pelas entradas de agua subtraida das saidas. As medidas hidricas de entrada e saida em uma bacia de drenagem sao onerosas, o que torna o uso de dados de sensoriamento remoto uma ferramenta de grande impacto socioeconomic para fins de gestao. Somado a isto, tem-se que estudos de disponibilidade hidrica com sensores orbitais sao relativamente escassos para a Bacia do Alto Paraguai (BAP). Dessa forma, a partir do processamento de dados de precipitacao do Tropical Rainfall Measuring Mission (TRMM) e de evapotranspiracao do MODIS Global Evapotranspiration Project (MOD16), o presente trabalho traz uma estimativa do balanco hidrico da BAP com sensores orbitais. Os resultados indicam que a BAP apresentou um superavit hidrico anual entre 2000 e 2014, muito embora os parametros hidricos anuais sejam pouco correlacionados. No entanto, parece haver fenomenos atmosfericos-climaticos que maximizam a correlacao entre os parametros hidrologicos e a anomalia de temperatura com atrasos de 2 a 5 anos, presumivelmente via teleconexoes climaticas defasadas co |
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ISSN: | 1516-4136 |
DOI: | 10.5380/raega |