Rios urbanos e a politíca de canalização

Fagundes, Beatriz

doi:10.14393/sn-v32-2020-44991

Cited by 2 publications

(2 citation statements)

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“…This is reflected in the absence of green areas, either due to the lack of inspection or to the lack of accurate data on springs and watercourses (Figure 7). This planning model, aimed at the real estate sector, hardly ever considers water as an integral element of the urban landscape, which is a recurring attitude in other cities in Brazil (Silva-Sánchez and Jacobi, 2012;Fagundes, 2020).…”

Section: New Forest Code and Conflicts Of Use And Occupation Around W...mentioning

confidence: 99%

The Trajectory of the Landscape and Functionality of Urban Watercourses: A Study of Lavras City, Brazil

Sousa¹,

Paiva²,

Reis³

et al. 2022

Front. Sustain. Cities

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The growth of the urban population promotes a strong pressure to occupy open spaces in urban center, including around watercourses. Canalization and drainage techniques favored urban expansion and occupation of these spaces. In long term, this has not been efficient, since it is not a sustainable decision, mainly in view of the challenges provided by climate change. The purpose of this work was to analyze the modification of the landscape and multifunctionality of the urban watercourses in relation to socioeconomic and environmental scope of the evolution of an urban area using Lavras city, Brazil, as model. For that, city's hydrographic grid was drawn from the digital elevation model (DEM) corrected by manual vectorization after field visits and analysis of high-resolution images. To understand natural and sociocultural evolution processes, a compilation of geo-historical information about the origin and formation of the city was made using Patchwork Quilt methodology. To understand the actions and perceptions of different actors from urban watercourses in Lavras, questionnaires were applied to the population, and interviews were directed to the public and private managers. It was observed that the watercourses and their surroundings lost a large part of their natural, social, and economic functions, after the 1980s, only having a drainage function. The areas in expansion prioritize the natural function preservation but lack the incentive to implement the other functions such as social and economic. With the economic valuation of land, the implementation of green and blue infrastructure has not yet been prioritized. Even with the legislation that provides multifunctional uses for rivers and their banks, the urban watercourses from Lavras remained largely monofunctional. This did not contribute to increasing the city's green areas and the reintegration of watercourses into the urban landscape. The population values the water present in the urban landscape and yearns for multifunctional solutions such as green areas and urban gardens. Public and private actors recognize the lack of clarity in the legislation, and in the definition of concepts and techniques to be adopted. Multifunctional solutions can be in favor of reconciling different interests, promoting the reintegration of rivers into the urban landscape.

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Section: New Forest Code and Conflicts Of Use And Occupation Around W...mentioning

confidence: 99%

The Trajectory of the Landscape and Functionality of Urban Watercourses: A Study of Lavras City, Brazil

Sousa¹,

Paiva²,

Reis³

et al. 2022

Front. Sustain. Cities

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show abstract

“…Some of the main intensifiers of the quality degradation and reduction of water availability are social pressures for spaces to be occupied, ecologically inappropriate economic practices, as well as the negligence of public authorities in the face of the irregular release of domestic and industrial effluents without any treatment directly into the rivers (Tedesco et al, 2021). In addition, the mischaracterization of natural conditions through the canalization of rivers or even with their confinement by closed channels would contribute to the development of cities (Fagundes, 2022).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of technical viability for urban rivers revitalization: Arroio Dilúvio case study in Porto Alegre/RS – Brazil

Medeiros,

Dornelles,

Silva

2023

RBRH

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The degradation of urban rivers is a phenomenon caused by virtually all cities intersected by rivers. Currently, there is a substantial number of revitalization projects in progress. Nonetheless, their execution demands significant investments, particularly for water quality enhancement. Moreover, apart from the cost factor, the scarcity of space along their banks constrains the implementation of improvement systems. This study introduces a simplified methodology aimed at evaluating the technical feasibility of revitalization interventions within urban river segments, with a focus on enhancing water quality and user experience. The method follows a structured framework encompassing four sequential phases: execution of hydraulic, hydrological, and sanitary analyses concerning the watershed; development of foundational principles and intervention strategies pertaining to the riverbed; appraisal of the congruence between proposed interventions and the intrinsic attributes of the river channel; comprehensive assessment of the overall viability of the revitalization initiative. The method's validation was conducted through a case study involving the Dilúvio Stream in Porto Alegre, RS, showcasing its coherent application and adaptability within the predetermined premises. Thus, the methodology emerges as a preliminary decision-making support tool for projects related to the urban river requalification domain, facilitating the identification of met prerequisites and provision of informed guidance.

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Rios urbanos e a politíca de canalização

Cited by 2 publications

References 0 publications

The Trajectory of the Landscape and Functionality of Urban Watercourses: A Study of Lavras City, Brazil

The Trajectory of the Landscape and Functionality of Urban Watercourses: A Study of Lavras City, Brazil

Evaluation of technical viability for urban rivers revitalization: Arroio Dilúvio case study in Porto Alegre/RS – Brazil

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