Morphometric Compartmentation of the Coco River Basin as Subsidy to Analysis of Environmental Fragility

Almeida, Rejane Freitas Benevides; Bayer, Maximiliano; Júnior, Laerte Guimarães Ferreira

doi:10.4215/rm2016.1504.0006

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…As características morfométricas são importantes condicionantes do comportamento hidrológico de bacias hidrográficas (Villela e Mattos, 1975;Swarnkar, Sinha e Tripathi, 2020). Assim, por meio da análise morfométrica, é possível compreender, através de um conjunto de variáveis, as quais relacionam um rol de características geográficas, a dinâmica da bacia hidrográfica como um todo, inclusive seus diferentes compartimentos e a sua fragilidade natural (Almeida, Bayer, Ferreira Júnior, 2016). Além disso, a análise morfométrica é um importante recurso para caracterizar e identificar a dinâmica de um sistema fluvial no âmbito geomorfológico, pois os cursos de água constituem elemento morfogenético dos mais ativos na esculturação da paisagem terrestre (Christofoletti, 1980;Soni, 2017).…”

Section: Introductionunclassified

Morfometria da bacia hidrográfica do Rio Verdinho, sudoeste de Goiás, Brasil

Alves

Martins

Morais

et al. 2020

Rev. Bras. Geog. Fis.

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Tendo em vista a importância dos recursos hídricos para o desenvolvimento econômico e social de uma nação, tornam-se necessários dados representativos sobre a geometria, o relevo e a drenagem de bacias hidrográficas para subsidiar a implementação de ações e políticas públicas voltadas para o planejamento e a gestão desse recurso de forma efetiva e eficiente. Assim, o objetivo central deste estudo foi analisar a morfometria da bacia hidrográfica do Rio Verdinho, que possui uma área de 154.430,19 ha. Essa unidade hidrográfica é importante fonte de água para o desenvolvimento econômico e social do município de Rio Verde, Sudoeste de Goiás. O estudo foi realizado com uso de modelos matemáticos, produtos de sensoriamento remoto e técnicas de geoprocessamento. A área de estudo apresenta variáveis morfométricas, que associadas às formações geológicas, aos solos e à precipitação pluviométrica, são predominantemente favoráveis à conservação e à recarga de água desse sistema. Porém, a forma alongada e possíveis ocorrências de chuvas intensas na cabeceira sujeitam essa unidade hidrográfica às torrentes eventuais, podendo causar prejuízos ambientais, econômicos e outros no trecho médio e baixo da bacia; a amplitude altimétrica máxima, as maiores declividades, a densidade hidrográfica, densidade de drenagem, a presença, em menor percentual, de Argissolo Vermelho, Neossolo Litólico e Nitossolo Vermelho são favoráveis à perda de solos. Os resultados indicam que as ações antrópicas na área de estudo devem contemplar manejo e práticas conservacionistas do solo. Esses resultados subsidiarão o planejamento e à gestão ambiental desse recurso, além de servir de base para outros trabalhos em âmbito local e de outras regiões, contribuindo para a conservação da água em quantidade e qualidade adequadas para os diferentes usos. Morphometry of the Watershed of Verdinho River, Southwest of Goiás, BrazilA B S T R A C TConsidering the importance of water resources to the economical and social development of a nation, representative data about the geometry, the relief and watershed drainage have become necessary to subsidize the implementation of actions and public policies regarding planning and management of this resource in an effective and efficient way. Therefore, the main objective of this study was to analyze the morphometry of the watershed of Verdinho River of x hectares. This water unit is an important water source for the economical and social development of the municipality of Rio Verde, Southwest of Goiás. The study was accomplished with the use of mathematical models, products of remote sensing and geoprocessing techniques. The study area presents morphometric variables which, associated to geological formations, to soils and rainfall, are predominantly favorable to the water conservation and recharge of this system. However, the elongated shape and possible occurrence of intense rainfall in the river head subject this watershed to eventual torrents, being able to cause environmental and economic damages and others in the mid and lower watershed positions; the maximum altimetric amplitude, the biggest slopes, water density, drainage density, the presence, in a lowest percentage, of Red Argisol, Litholic Neosol and Red Nitosol are favorable to soil loss. The results indicate that the anthropic actions in the study area must contemplate management and conservationist practices of the soil. These results will subsidize the planning and environmental management of this water resource, besides serving as a base to other operations locally and in other regions, contributing to the preservation of the water in quantity and proper quality for different uses.Keywords: Geotechnologies; Mathematical Models; Water Resources

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Section: Introductionunclassified

Morfometria da bacia hidrográfica do Rio Verdinho, sudoeste de Goiás, Brasil

Alves

Martins

Morais

et al. 2020

Rev. Bras. Geog. Fis.

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Environmental fragility framework for water supply systems: a case study in the Paulista Macro Metropolis area (SE Brazil)

et al. 2017

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Influence of watershed land use on water quality in the state of Santa Catarina, Brazil

Vieira

Ribeiro

2022

GES

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The inappropriate use of water resources by human actions compromises the balance between natural and anthropogenic factors. In this study, exploratory and field research were conducted with a scope of quantifying, based on satellite imaging, the use and occupation of land on the banks of the Itajaí-Açu River, the largest watercourse in the Itajaí River Basin, located in the State of Santa Catarina, Brazil. Five sampling points were allocated along the river at different times of the year to analyze water quality using chemical and biological indicators. The characterization of land use and occupation was carried out with Sentinel-2B satellite images at 10m resolution and QGIS software. Version 3.6.3 of the R Software was used to consolidate the data. The land use was categorized into several classes, the most representative of which was vegetation, which presented coverage of 34.42%, followed by the pastures and open fields class, with 27.83%, agriculture, with 18.18%, and urban areas, with 16.59% coverage. Our study showed that 62.6% of the river’s base was affected by anthropogenic influence, characterizing an environment severely altered from its normal state. The results obtained in the statistical analysis revealed a directional correlation between land use and water quality, thus indicating that cities on the banks of watercourses are major sources of potential contaminants. Among the classes of land use, the presence of vegetation along the riverside territory attenuated part of the load of pollutants launched into the Itajaí-Açu River. This finding highlights the importance of conserving the vegetation alongside the river to maintain water quality and, consequently, preserve the ecosystem’s biota.

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Morphometric Compartmentation of the Coco River Basin as Subsidy to Analysis of Environmental Fragility

Cited by 5 publications

References 6 publications

Morfometria da bacia hidrográfica do Rio Verdinho, sudoeste de Goiás, Brasil

Morfometria da bacia hidrográfica do Rio Verdinho, sudoeste de Goiás, Brasil

Environmental fragility framework for water supply systems: a case study in the Paulista Macro Metropolis area (SE Brazil)

Influence of watershed land use on water quality in the state of Santa Catarina, Brazil

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