Flow distribution and trends in the Das Velhas River Basin

Melo, Larissa Silva; Júnior, João C. F. Borges; Silva, Ana Paula Coelho Madeira

doi:10.4136/ambi-agua.2289

Cited by 2 publications

(5 citation statements)

References 24 publications

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“…It was found that the Weibull, LogPearson 3 and Pearson 3 distributions were the ones that presented the lowest standard errors, 0.87, 0.90 and 0.94 m³.s -1 respectively, therefore the best fit, while the distributions that presented the highest standard errors were the LogNormal 3 and 2 parameter distributions, 1.02 and 1.12 m³.s -1 respectively.In a research carried out by Zoneamento Ecológico-Econômico de Minas Gerais (Minas Gerais, 2008), it was found a value of 29.28 m³.s -1 for low flow rate Q7,10, with a relative error of 27.01% for the same fluviometric station of this study. In addiction,Melo et al (2019) found values close to Q7,10 for fluviometric station of Jequitibá River (MG), 23.60 m³.s -1, which has a drainage area similar to that of Rio das Mortes basin.…”

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confidence: 61%

Relationship between the hydrological regime and the land use and cover of the Rio das Mortes Basin

Carvalho,

Oliveira,

Corrêa

et al. 2023

Rev. Agro. Amb.

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Interactions between land use and cover and a basin hydrological regime are complex and dynamics. The identification of trends and changes in rainfall and flow regimes in a region is relevant in water resources planning and management so that environmental, economic and social adversities are avoided. Thus, this study aims to identify possible trends in the historical series of rainfall and fluviometric stations in Rio das Mortes basin, Minas Gerais, Brazil, as well as to relate the modifications in the flow rate behaviour due to changes in land use and cover in the basin between the years of 1985 and 2017. For that, hydrological data were used from the Ibituruna-MG river station and 12 rainfall stations and orbital images from Landsat-5 and Sentinel satellites. Flow rate and precipitation behavior were performed using the nonparametric Mann-Kendall test and the Pettitt’s test, while the land use and cover classification was performed in an eCognition Developer® 64 environment. Significant trends were observed in the average of total annual rainfall series and decreasing trends in the average of monthly flow rate series of lowest runoff over the years 1925 to 2014. There were changes in land use and cover in the studied region, however, these were not significant enough to modify the hydrological regime of Rio das Mortes basin during the analysed period.

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mentioning

confidence: 61%

Relationship between the hydrological regime and the land use and cover of the Rio das Mortes Basin

Carvalho,

Oliveira,

Corrêa

et al. 2023

Rev. Agro. Amb.

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“…Em contrapartida, Minuzzi e Caramori (2011) não detectaram mudanças significativas no comportamento da chuva no estado do Paraná, apesar das descontinuidades notadas nas décadas de 1980 e 1990 para chuvas sazonais e anuais em alguns postos. Outros estudos também relatam a inexistência de tendência em séries temporais de precipitação em outras regiões do país, o que evidencia a heterogeneidade climática brasileira e a cautela necessária em análises mais abrangentes (Marengo e Alves, 2005;Alexandre et al, 2010;Blain, 2010;Lima et al, 2011;Nunes et al 2018;Penereiro e Meschiatti, 2018;Alcântara et al, 2019;Melo et al, 2019).…”

Section: Período Analisadounclassified

“…Na bacia do rio Paraíba do Sul, Marengo e Alves ( 2005) relatam a estacionariedade da série de precipitação e a tendência de decréscimo das vazões, o que foi atribuído à interferência antrópica na bacia. Na mesma linha, Melo et al (2019) detectaram tendência de diminuição das vazões mínimas de sete dias de duração em três estações fluviométricas na bacia do rio das Velhas, Minas Gerais, embora não tenha sido constatada qualquer tendência nas séries de precipitação na região.…”

Section: Período De Análiseunclassified

“…Tendências de aumento das vazões são relatadas por Genta et al (1998), Müller et al (1998), Gueter e Prates (2002), Sáfadi (2004), Rosin et al (2015), e Teixeira et al (2020). Viés decrescente é relatado por Moraes et al (1998), Marengo e Alves (2005) e Melo et al (2019). No Sul do Brasil, as afluências mostraram-se não-estacionárias nos estudos de Detzel et al (2011) e Bartiko et al (2017).…”

Section: Introductionunclassified

“…No Sul do Brasil, as afluências mostraram-se não-estacionárias nos estudos de Detzel et al (2011) e Bartiko et al (2017). Com relação às séries de precipitação no Brasil, relatase tanto viés crescente (Berlato e Cordeiro;Nunes et al, 2018;Quadros et al, 2018;Guedes et al, 2019) como decrescente (Santos e Nishiyama, 2016), e ainda ausência de tendência (Sá et al, 2018;Alcântara et al, 2019;Melo et al, 2019).…”

Section: Introductionunclassified

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Análise de Séries Hidrológicas na Bacia Hidrográfica afluente à Usina Hidrelétrica Castro Alves, RS

Ribeiro

Bortolin

Mendes

et al. 2021

Rev. Bras. Geog. Fis.

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This study aims to analyze the stationariety and homogeneity of rainfall and streamflow series of the contribution basin of Castro Alves Hydroeletric Power Plant, in Southern Brazil. The rainfall data were acquired from the Agência Nacional de Águas, and the average rainfall series was calculated for the period from 1945 to 2017. The streamflow data were acquired from the Operador Nacional do Sistema Elétrico covering a period from 1945 to 2017. The analysis were performed in the complete series and in two periods obtained from the same, referring to the period before and after 1970. Six statistical tests were used to check the stationarity: t-Student, F-Snedecor, Spearman Correlation Coefficent, Cox-Stuart, Mann-Whitney and Mann-Kendall. The verification of the point of change in the series of total annual precipitations, monthly totals and monthly average flows was performed using Pettitt’s test. The analysis results made it possible to conclude that the hydrological series are non-stationary. The period prior to 1970 was characterized as non-stationary. The period after 1970 showed significant signs of stationarity and homogeneity for both variables. Using the Pettitt test, a trend change was identified in the year 1971 and 1970 for the series of annual total precipitations and monthly mean flows, respectively. In the monthly analyzes of the series, it was found that the increase in the precipitated total was more accentuated in the dry months of May and November. This corroborates the more pronounced increase in the average monthly streamflow observed in those same months.

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Flow distribution and trends in the Das Velhas River Basin

Cited by 2 publications

References 24 publications

Relationship between the hydrological regime and the land use and cover of the Rio das Mortes Basin

Relationship between the hydrological regime and the land use and cover of the Rio das Mortes Basin

Análise de Séries Hidrológicas na Bacia Hidrográfica afluente à Usina Hidrelétrica Castro Alves, RS

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