2019
DOI: 10.5902/1980509835333
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Dinâmica do desmatamento na Amazônia e seus impactos na hidrologia: bacia do Rio Machadinho – Rondônia/Brasil

Abstract: A bacia hidrográfica do rio Machadinho é um exemplo de ocupação desordenada presente na região amazônica, na qual foram desmatadas grandes áreas com consequente conversão da floresta em pastagens e em núcleos urbanos. O presente trabalho tem o objetivo de analisar os impactos na hidrologia (vazão, precipitação e evapotranspiração) da bacia do rio Machadinho diante de sua dinâmica de ocupação antrópica. Primeiramente, analisaram-se mudanças na cobertura da terra usando imagens do sensor Landsat 5-TM para os ano… Show more

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Cited by 12 publications
(5 citation statements)
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“…According to ICMBIO (2013), deforestation, mainly for energy production and agricultural purposes, is the main process accounting for changes taking place in the Caatinga biome; according to estimates, 42.3% of its original vegetation cover has already undergone some type of change and 52% of this biome suffers from degradation issues. These changes in landscape can lead to significant biodiversity loss and climate change, as well as to changes in hydrological cycles, as observed by Souza et al (2019) and Cohen et al (2007), who described changes in the hydrological cycle in the Amazon Forest due to deforestation dynamics.…”
Section: Trend Scenario Projectionmentioning
confidence: 87%
“…According to ICMBIO (2013), deforestation, mainly for energy production and agricultural purposes, is the main process accounting for changes taking place in the Caatinga biome; according to estimates, 42.3% of its original vegetation cover has already undergone some type of change and 52% of this biome suffers from degradation issues. These changes in landscape can lead to significant biodiversity loss and climate change, as well as to changes in hydrological cycles, as observed by Souza et al (2019) and Cohen et al (2007), who described changes in the hydrological cycle in the Amazon Forest due to deforestation dynamics.…”
Section: Trend Scenario Projectionmentioning
confidence: 87%
“…The automatic calibration of the parameters was performed using the Algorithm Genetically Adaptive Multiobjective (AMALGAM) [32], as described in [12]. The objective functions used were the Nash Coefficient-NS [33], its logarithmic version (NSlog), and the Pbias coefficient (%) [10]. The number of evaluations (defined as 5000) was the stopping criterion for the algorithm.…”
Section: Calibration and Validation Of The Lash Modelmentioning
confidence: 99%
“…Atualmente, reconhece-se a importância que estes ecossistemas desempenham para a mitigação das mudanças climáticas, tendo em vista o elevado sequestro de carbono necessário para suprir o rápido crescimento das espécies que se estabelecem inicialmente (SOUZA et al, 2019). Sabendo disso, inúmeros trabalhos em ecossistemas sucessionais foram realizados na região para quantificar o estoque e/ou a deposição de serapilheira (VASCONCELOS et al, 2007;PEREIRA et al, 2017).…”
Section: Palavrasunclassified