Contribution of Morphometry to Flood Studies in the Luís Alves Basin/Sc, Brazil

Franco, Ana Carolina Vicenzi; Santo, Mariane Alves Dal

doi:10.4215/rm2015.1403.0009

Cited by 5 publications

(6 citation statements)

References 2 publications

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“…Os autores Christofoletti (1980), Tonello et al (2006), Déstro (2010), Apolinário et al (2014), Teodoro et al (2015), Franco & Santo (2015), Almeida et bifurcation points were equal or similar to those produced by the ODR_Hidro model, for both the SRTM segmented image and the original SRTM. The Mann-Whitney test was applied to six samples, four of which accepted the hypothesis and only two rejected.…”

Section: Introductionmentioning

confidence: 94%

“…Assim, os estudos relacionados à morfometria de bacias hidrográfi cas auxiliam na gestão do território e na elaboração de planos de gestão e manejo (CAMPANHARO et al, 2012). Diversos autores utilizaram a caracterização morfométrica para o planejamento ambiental e mensuração dos parametros físico em bacias hidrógrafi cas (MOREIRA & SERRA, 2017); visando obter diagnóstico físico-ambiental conservacionista (PINTO et al, 2014;APOLINÁRIO et al, 2014;DÉSTRO, 2010); para gestão e planejamento ambiental diante dos diversos usos (FERREIRA et al, 2016); como contribuição da morfometria para o estudo das inundações (FRANCO & SANTO, 2015); como subsídio para a análise de fragilidade ambiental (ALMEIDA et al, 2016); e como suporte para a definição e elaboração de indicadores de gestão ambiental (TONELLO et al, 2006;SILVA et al, 2010).…”

Section: Introductionunclassified

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Análise De Técnicas De Segmentação Para Melhoria Na Obtenção De Dados Geomorfométricos Com Base Em Ferramentas Open Source

Oliveira

Bias

Steinke

et al. 2020

Rev. Bras. Geomorfol.

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do QGIS, desenvolvido em linguagem Python. As formulações matemáticas foram compiladas dentro do modelo ODR_Hidro, assim como sua adaptação, por intermédio de outros algoritmos hidrológicos que são utilizados por software como o QGIS, GrassGIS e SagaGIS, subsidiando a extração dos índices geomorfométricos, a delineação da bacia e a extração dos canais da rede de drenagem. Os resultados foram avaliados a partir da aplicação do teste de hipóteses utilizando a estatística do Teste Mann-Whitney, para verifi car se as médias das discrepâncias das coordenadas encontradas para os eixos E e N dos pontos de bifurcações são iguais ou similares àquelas que foram produzidas pelo modelo ODR_Hidro, tanto na imagem SRTM segmentada quanto na do SRTM original. O Teste de Mann-Whitney foi aplicado em seis conjuntos de amostras, sendo que em quatro, as hipóteses foram aceitas e apenas em dois conjuntos de amostras as hipóteses foram rejeitadas. Através dos resultados obtidos, infere-se que a aplicação do modelo ODR_Hidro para caraterização e defi nição de índices geomorfométricos utilizando a imagem do SRTM segmentado, ser bastante efi ciente, haja visto que a validação de campo demonstrou a efi ciência do modelo ao comprovar a existência das drenagens de 1ª ordem não mapeada na carta da DSG. Assim, é possível concluir que a segmentação de imagens, visando à caracterização geomorfométrica de bacias hidrográfi cas, poderá contribuir de forma efi ciente para o fornecimento de dados morfométricos.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionunclassified

Análise De Técnicas De Segmentação Para Melhoria Na Obtenção De Dados Geomorfométricos Com Base Em Ferramentas Open Source

Oliveira

Bias

Steinke

et al. 2020

Rev. Bras. Geomorfol.

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“…The compactness coefficient or Gravelius index is used to determine the shape of the river basins and is, as well as the circularity index, related to a circle (Franco & Dal Santo, 2015) Form Factor (Kf)…”

Section: √𝐴mentioning

confidence: 99%

Multi-Criteria Analysis for Assessing Flood Susceptibility in the Municipality of Conselheiro Lafaiete (MG)

Pereira,

Marcia,

Anjos

et al. 2024

RGSA

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Objective: To evaluate the susceptibility to flooding in the municipality of Conselheiro Lafaiete – Minas Gerais, using the Hierarchical Analytical Process method. Theoretical Framework: Floods are events that affect several Brazilian cities, where the main related factors are denoted by the morphometric characteristics of the river basin(s) that comprise them, associated with slope, hypsometry, soil typology and use and land occupation. In this sense, multi-criteria analyzes are fundamental for mapping areas of susceptibility to flooding in river basins. Method: The study proceeded by characterizing the study area, integrating the diagnosis of the drainage system, morphometric analysis of the river basin in which Conselheiro Lafaiete is integrated, and the application of the Hierarchical Analysis Method (AHP) to map areas susceptibility to flooding of the river basin. Results and Discussion: The results obtained revealed [synthesize the main results of the research]. In the discussion section, these results are contextualized in light of the theoretical framework, highlighting the implications and relationships identified. Possible discrepancies and limitations of the study are also considered in this section. Research Implications: The study indicates gaps in Conselheiro Lafaiete PMSB with regard to urban drainage and points out, through mapping, the areas of the municipality most susceptible to the occurrence of flood events. Originality/Value: The mapping of areas susceptible to flooding carried out for Conselheiro Lafaiete considered a multi-criteria approach, integrating anthropogenic factors. The product can be applied as a basic tool for public management regarding urban drainage and flood risk management in the municipality.

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“…They characterized this as a low Rd, meaning that the emergence of new channels would be difficult. The relationship between the parameters observed in this study, namely that Dd is greater than Rd, indicates the need for structural control in the analyzed basin (FRANCO; SANTO, 2015).…”

Section: Bioscimentioning

confidence: 99%

Physical parameters of the cachimbal river sub-basin associated to landscape change in Pinheiral-RJ, Brazil

Gaia-Gomes¹,

Pereira²,

Santos³

et al. 2018

Biosci. J.

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ABSTRACT:The objective of this study was to characterize the physical parameters of the Cachimbal River Watershed, located in Pinheiral, Rio de Janeiro State, Brazil, and to use the resulting data to identify degradation risks. To achieve this purpose, a Hydrologically Consistent Digital Elevation Model (HCDEM) was generated using contour line, river path, and area boundary data extracted from topographic maps of the cities of Volta Redonda (Page SF-23-ZAV-2) and Piraí (Page SF-23-Z-VI-1). These maps were obtained from the Brazilian Institute of Geography and Statistics, and were rendered at a scale of 1:50,000 ArcGISs version 10.5 software was used to generate the HCDEM, from which the physical parameters were extracted. Results showed that the altitude of the area ranges from 360 m to 740 m, while the slope varies heterogeneously from 6% to 28%. The sub-basin has a total area of 104.15 km², a perimeter of 63.41 km, a main channel length of 21.79 km, and a 5th-order dendritic drainage network. Other parameters include a compactness coefficient of 1.74, a form factor of 0.34, and a circularity ratio of 0.33. These values indicate that the sub-basin is not prone to floods because of its elongated shape. Meanwhile, drainage density was 2.60 km km -2 , while river density was 5.5 channels km -2 ; these parameters indicate excellent performance and high potential to generate new channels. Although the roughness coefficient indicates that the area is suitable for agricultural development, the roughness index demonstrates the need to adopt more nuanced agricultural practices that account for the particular features of the area, such as topographic variation and soil characteristics.

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Contribution of Morphometry to Flood Studies in the Luís Alves Basin/Sc, Brazil

Cited by 5 publications

References 2 publications

Análise De Técnicas De Segmentação Para Melhoria Na Obtenção De Dados Geomorfométricos Com Base Em Ferramentas Open Source

Análise De Técnicas De Segmentação Para Melhoria Na Obtenção De Dados Geomorfométricos Com Base Em Ferramentas Open Source

Multi-Criteria Analysis for Assessing Flood Susceptibility in the Municipality of Conselheiro Lafaiete (MG)

Physical parameters of the cachimbal river sub-basin associated to landscape change in Pinheiral-RJ, Brazil

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