Descarga de margem plena na bacia amazônica através da altimetria espacial
This study proposes a methodology to calculate bankfull discharge along the rivers of the Amazon Basin by radar altimetry. We used ENVISAT and JASON - 2 satellites data to determine hydrological parameters such as width, amplitude, cross-sectional are a and water surface slope of the river. We have...
| Autor principal: | Leão, Jorjânia de Oliveira |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/12588 http://lattes.cnpq.br/0517501335619875 |
| Resumo: |
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This study proposes a methodology to calculate bankfull discharge along the rivers of the Amazon Basin by radar altimetry. We used ENVISAT and JASON - 2 satellites data to determine hydrological parameters such as width, amplitude, cross-sectional are a and water surface slope of the river. We have used a classification curve to validate this approach; the procedure determines the inflection point associated with the level that fills the channel to the top of its banks and at a point where the water begins to over flow onto a floodplain. Validations between bankfull discharge by altimetry data and gauges result in RMS ranging between 38 to 1633 m 3 /s. Comparisons with differents missions and algorithms showed that JASON-2 and Ice-1 algorithm, provides the more accurate bankfull discharge, e.g. 75 % of the validations. Results encourage the potential of this methodology at large rivers and/or poorly monitored regions. |