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Journal of Geodetic Science

Editor-in-Chief: Sjöberg, Lars

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2081-9943
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Analysis of water level variations in Brazilian basins using GRACE

A. Matos
  • Department of Transportation University of São Paulo, Laboratory of Topography and Geodesy, EPUSP-PTR, Postal Code 61548, CEP: 05424-970, São Paulo/SP, Brazil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ D. Blitzkow
  • Department of Transportation University of São Paulo, Laboratory of Topography and Geodesy, EPUSP-PTR, Postal Code 61548, CEP: 05424-970, São Paulo/SP, Brazil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ F. Almeida
  • Center for Innovation in Engineering of Logistics Systems (CISLog) Department of Production, University of São Paulo, EPUSP-PRO, Postal Code 72026, CEP: 05508-970, São Paulo/SP, Brazil
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  • De Gruyter OnlineGoogle Scholar
/ S. Costa
  • Directorate of Geosciences, Department of Geodesy Av. Brasil, Brazilian Institute of Geography and Statistics, n° 15.671 Bloco IIIA sala 06, Parada de Lucas - Rio de Janeiro, Brazil
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/ I. Campos
  • Faculty of Civil Engineering, Federal University of Uberlândia, Av. João Naves de Ávila, 2160 Campus Santa Mônica, Uberlândia MG, Brazil
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/ A. Barbosa
Published Online: 2012-07-19 | DOI: https://doi.org/10.2478/v10156-011-0034-7

Analysis of water level variations in Brazilian basins using GRACE

A comparison between daily in-situ water level time series measured at ground-based hydrometric stations (HS - 1,899 stations located in twelve Brazilian basins) of the Agência Nacional de Águas (ANA) with vertically-integrated water height anomaly deduced from the Gravity Recovery and Climate Experiment (GRACE) geoid is carried out in Brazil. The equivalent water height (EWH) of 10-day intervals of GRACE models were computed by GRGS/CNES. It is a 6-year analysis (July-2002 to May-2008). The coefficient of determination is computed between the ANA water level and GRACE EWH. Values higher than 0.6 were detected in the following basins: Amazon, north of Paraguay, Tocantins-Araguaia, Western North-East Atlantic and north of the Parnaíba. In the Uruguay (Pampas region) and the west of São Francisco basins, the coefficient of determination is around 0.5 and 0.6. These results were adjusted with a linear transfer function and two second degree polynomials (flood and ebb period) between GRACE EWH and ANA water level. The behavior of these two polynomials is related to the phase difference of the two time series and yielded four different types of responses. This paper shows seven ANA stations that represent these responses and relates them with their hydro-geological domain.

Keywords: correlation analysis; water level variations; GRACE

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About the article


Published Online: 2012-07-19

Published in Print: 2012-01-01


Citation Information: Journal of Geodetic Science, ISSN (Online) 2081-9943, ISSN (Print) 2081-9919, DOI: https://doi.org/10.2478/v10156-011-0034-7.

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