Analysis of the Crust Displacement in Amazon Basin

Guimarães, Gabriel do Nascimento; Blitzkow, Denizar; Matos, Ana Cristina Oliveira Cancoro de; Filho, Flávio Guilherme Vaz de Almeida; Barbosa, Artur Felipe Santos

doi:10.1007/978-3-642-20338-1_111

Cited by 2 publications

(5 citation statements)

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“…The estimated error on the limnimeter scale (cm interval) in the visual process of data reading was of the order of 2 cm (GUIMARÃES et al, 2012).…”

Section: Gps Networkmentioning

confidence: 94%

“…The main factor which influences the water level in the Amazon Basin is the intensive rainfall as a consequence of the humidity of the tropical climate. A considerable part of the rain in the Amazon basin is supplied by the ecosystems evapotranspiration, with an annual average contribution from 55% to 60% from the total precipitation (GUIMARÃES et al, 2012). It is a region with a constant scientific interest due to its environmental and climate importance on a global scale and its biodiversity.…”

Section: The Study Region -Amazon Basin and Neighbor Basinsmentioning

confidence: 99%

“…The time series pairs of GRACE Ewh and in-situ ANA, were adjusted by least-square linear inversion, in order to get the best fitting between these two pairs of time series, assuming the linear relationship as (GUIMARÃES et al, 2012;ALMEIDA, 2009). …”

Section: Texas Centre For Space Research-csr Jet Propulsion Laboratmentioning

confidence: 99%

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Validação da avaliação pelo GRACE do acúmulo de água no subsolo da bacia amazônica com base em dados de linígrafos

2012

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The Amazon basin is a region of constant scientific interest due to its environmental importance and its biodiversity and climate on a global scale. The seasonal variations in water volume are one of the examples of topics studied nowadays. In general, the variations in river levels depend primarily on the climate and physics characteristics of the corresponding basins. The main factor which influences the water level in the Amazon Basin is the intensive rainfall over this region as a consequence of the humidity of the tropical climate. Unfortunately, the Amazon basin is an area with lack of water level information due to difficulties in access for local operations. The purpose of this study is to compare and evaluate the Equivalent Water Height (Ewh) from GRACE (Gravity Recovery And Climate Experiment) mission, to study the connection between water loading and vertical variations of the crust due to the hydrologic. In order to achieve this goal, the Ewh is compared with in-situ information from limnimeter. For the analysis it was Costa, S. M. A. et al. Bol. Ciênc. Geod., sec. Artigos, Curitiba, v. 18, n o 2, p.262-281, abr-jun, 2012. 2 6 3 computed the correlation coefficients, phase and amplitude of GRACE Ewh solutions and in-situ data, as well as the timing of periods of drought in different parts of the basin. The results indicated that vertical variations of the lithosphere due to water mass loading could reach 7 to 5 cm per year, in the sedimentary and flooded areas of the region, where water level variations can reach 10 to 8 m. Keywords: GPS; GRACE; Limnimeter Stations. RESUMO A bacia Amazônica é uma região de constante interesse científico devido à sua importância ambiental e climática e à sua biodiversidade em uma escala global. As variações sazonais do volume d'água é um dos exemplos de temas estudados atualmente. Em geral, as variações dos níveis dos rios dependem basicamente do clima e das características físicas das bacias hidrográficas correspondentes. O fator principal de grande influência no nível d'água na bacia Amazônica são as elevadas precipitações na região em conseqüência da umidade do clima tropical. Infelizmente a bacia Amazônica é uma região com carência de informações de dados do nível da altura d'água devido a dificuldade de acesso para operações locais. A proposta deste trabalho é comparar e avaliar as grades do Equivalente à altura d'água (Ewh) da missão GRACE (Gravity Recovery And Climate Experiment), para estudar o ciclo hidrológico e sua relação com a variação da litosfera na região. Com este propósito os dados GRACE (Ewh) são comparados com observações in-situ obtidas dos linígrafos. Para esta validação foram calculados o coeficiente de correlação, fase, amplitude do GRACE (Ewh) e dos dados in-situ, bem como, os períodos de seca em diferentes partes da bacia. Os resultados indicam que as variações verticais da litosfera devido à carga da massa d'água podem chegar de 7 a 5 cm por ano nas áreas sedimentares e alagadas da região, onde as variações do nível d'água pode...

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“…The estimated error on the limnimeter scale (cm interval) in the visual process of data reading was of the order of 2 cm (GUIMARÃES et al, 2012).…”

Section: Gps Networkmentioning

confidence: 94%

Section: The Study Region -Amazon Basin and Neighbor Basinsmentioning

confidence: 99%

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Validação da avaliação pelo GRACE do acúmulo de água no subsolo da bacia amazônica com base em dados de linígrafos

2012

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“…Guimarães et al. (2012), when using time series of hydrological stations at specific sites in the Amazon Basin, obtain a vertical displacement over the annual cycle of 80–100 mm and an opposite phase correlation between the data of the GNSS positioning stations, the hydrological stations, and the GRACE data. Almeida et al.…”

Section: Introductionmentioning

confidence: 99%

“…Davis et al (2004) suggest a vertical deformation of 13 mm in the region of the Amazon River. Guimarães et al (2012), when using time series of hydrological stations at specific sites in the Amazon Basin, obtain a vertical displacement over the annual cycle of 80-100 mm and an opposite phase correlation between the data of the GNSS positioning stations, the hydrological stations, and the GRACE data. Almeida et al (2012), based on the comparison of GRACE data and local measurements of a river flow, study the water mass distribution of the Amazon Basin and comment that the correlation could be related to the geology of the region, as it is higher in the Solimões-Amazonas and Piedmont Andean areas and lower in the Guiana and Guaporé shield areas.…”

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confidence: 99%

Vertical Displacement Caused by Hydrological Influence in the Amazon Basin

et al. 2021

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Hydrologic loading studies are related to variables such as soil moisture, precipitation, and groundwater. These parameters are associated with water mass movements, which may affect the positioning of the Global Navigation Satellite System (GNSS) stations and the gravitational field in a seasonal mode. This study addresses the relationship between displacement and deformation variations observed in the Amazon Basin and local geological and climatic features. It also aims to understand mechanisms that may influence the water distribution and mass movement during the hydrological cycle. We have correlated the vertical displacement with soil moisture at different depths in the Amazon Basin. Our approach takes into consideration topography, soil type, water storage, hydrologic deformation model used, sediment thickness, and geology. We show that amplitude variation of soil moisture and water storage parameters depends on the region's geological nature, that is, whether it is dominated by sedimentary or igneous/metamorphic rocks. In areas dominated by sedimentary rocks, soil moisture increases with depth, while in regions dominated by igneous and metamorphic rocks, soil moisture decreases with depth. We conclude that geology and topography influence the vertical displacement associated with the hydrologic loading. We further show an East‐West gradient in the Amazon Basin, in which the largest amplitudes of vertical displacement occur in the sedimentary basins to the East. A few stations in the sedimentary basins have less vertical displacement than expected. We argue that these areas may be associated with thinner and more compact sedimentary rock, or even with intrusive igneous rocks.

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Analysis of the Crust Displacement in Amazon Basin

Cited by 2 publications

References 14 publications

Validação da avaliação pelo GRACE do acúmulo de água no subsolo da bacia amazônica com base em dados de linígrafos

Validação da avaliação pelo GRACE do acúmulo de água no subsolo da bacia amazônica com base em dados de linígrafos

Vertical Displacement Caused by Hydrological Influence in the Amazon Basin

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