Análise morfológica de espaços urbanos em bacias hidrográficas: um olhar sobre o entorno do Arroio Dilúvio em Porto Alegre

Abstract

ResumoEste artigo busca apresentar reflexões acerca de estratégias de qualificação da Bacia Hidrográfica do Arroio Dilúvio, área densamente ocupada na Região Metropolitana de Porto Alegre (RMPA). Adota-se inicialmente o método de análise urbana baseado nas contribuições de percepção da cidade desenvolvida por Kevin Lynch, buscando destacar, em três trechos demarcados ao longo de suas margens, situações identificadas como críticas devido aos conflitos que geram entre a população e o meio em que se inserem. Aponta-se, ao final, para a necessária integração entre a recuperação do curso de água e sua conexão com o entorno construído e vivido.Palavras-chave: bacia hidrográfica do Arroio Dilú-vio; análise urbana; conflitos; integração; entorno construído e vivido. AbstractThis paper presents some reflections on the qualification strategies of the Dilúvio River Basin, a high density area in the Metropolitan Region of Porto Alegre. We used the urban analysis method based on the contributions of city perception developed by Kevin Lynch, seeking to highlight, in three demarcated stretches along the river's margins, critical situations regarding conflicts between the population and the environment. At the end, we argue that there must be integration between the recovery of the watercourse and its connection with the city's everyday life.

Physico-chemical variability and heavy metal pollution of surface sediment in a non-channeled section of Dilúvio Stream (Southern Brazil) and the influence of channeled section in sediment pollution

“…The annual climate means are 19°C for air temperature, 76% for air humidity and 1,324 mm of precipitation (Menegat et al, 2006). The sub-basin of Dilúvio Stream has 83.74 km², flowing through 17.6 km, with approximately 10.5 km channeled (Menegat et al, 2006;Mog et al, 2014), and sinuosity of 1.08, indicating the presence of a more-linear channel. Due to periodic floods that were displacing the citizens and curtailing development in the affected regions, it was decided between the mid-1930's and 1980's (Mog et al, 2014) that the stream would be transposed and channeled.…”

“…The sub-basin of Dilúvio Stream has 83.74 km², flowing through 17.6 km, with approximately 10.5 km channeled (Menegat et al, 2006;Mog et al, 2014), and sinuosity of 1.08, indicating the presence of a more-linear channel. Due to periodic floods that were displacing the citizens and curtailing development in the affected regions, it was decided between the mid-1930's and 1980's (Mog et al, 2014) that the stream would be transposed and channeled. However, even in 1913, some modification had taken place in the study's area, transposing it to the current place and filling the old bed flow (Ferlini, 1913).…”

“…The section between the sources and the Agronomy neighborhood (Porto Alegre City) are marked by irregular occupations. The lack of sanitation and the sewage discharges directly into the water bodies cause the traces of pollution that can be noticed before even entering the channeled area (Mog et al, 2014).…”

“…Dilúvio Stream is a small urban river located in Porto Alegre City, the capital of the State of Rio Grande do Sul in Brazil, with sources in the park Saint-Hilaire, in Viamão City (the neighboring city) and the outflow in Lake Guaíba, which is the main source of water supply for Porto Alegre City. Dilúvio's sub-basin, part of the Lake Guaíba drainage basin, is densely populated with about 446,000 inhabitants, suffering many effects from the disordered population growth and rapid industrialization in Porto Alegre, and lack of investments in basic sanitation (Mog et al, 2014). In addition, this region has large waterproofed areas and buildings in its surroundings, as well as the channeling and rectification of the stream with the Rev.…”

Práticas sustentáveis no manejo do efluente produzido em Instituição de Educação Superior

“…O crescimento populacional, os hábitos de consumo e a diversificação de atividade vêm sobrecarregando reservatórios hídricos. A poluição hídrica, especialmente em locais com sistema de saneamento básico precário e onde as fontes de resíduos não são controladas, tem aumentado a degradação de mananciais (Mog et al, 2014;Wantzen et al, 2019). Contudo, os problemas do tratamento e da correta disposição de efluentes têm sido negligenciados, apresentando ainda menos visibilidade do que a EA para a reciclagem de resíduos sólidos (Lozano et al, 2015).…”