Abstract:This paper presents a study of compensatory alternatives in urban drainage, using SWMM model (Storm Water Management Model), for the critical point of flooding in an urban area and vulnerable to tide fluctuations, located in Recife. For this, we used the registered information of the micro-drainage network and defined the parameters and variables required for modeling, such as: the subareas of contribution to the drainage system, indicating the percentage of soil waterproofing, equivalent width, slope, and inf… Show more
“…In addition, these runoffs are often influenced by high rates of soil impermeabilization, which decrease infiltration of water into the soil, increase flow velocity, and water volume, generating new points where flooding occurs (Aragão et al, 2017). The use of compensatory techniques for storm water management therefore has been widely suggested (Oliveira et al, 2016;Silva Junior, et al, 2017;Silva, 2018).…”
Section: Issn:1984-2295mentioning
confidence: 99%
“…Recife is one of these cities that has frequently suffered from flooding, which causes major disruptions, especially in tunnels. Such structures are constantly threatened during rainy seasons, especially when the tide is high (Cabral and Alencar, 2005;Silva Junior et al, 2017). This is because most Brazilian coastal cities are cut by canals or rivers that rise and fall with the tide.…”
Flooding in urban centers has been treated as a direct consequence of excessive rainfall, without considering the integrated functioning of the drainage system. These problems have caused engineers to propose auxiliary solutions or techniques that assist urban drainage. The objective of this study was to analy ze the technical feasibility of using compensatory measures such as permeable pavement, for tunnel accesses, as an aid to existing drainage. The soil of the unpaved regions, which represent only 16.3% of the study area, was characterized using the Beerkan method, followed by an analysis of the water balance of the region using the Hydrus-1D computational model, in order to determine the rainfall on the unpaved regions surrounding the tunnels. The water balance of this portion of the study area showed that, of the 239.69 mm.m -2 that precipitated over unpaved areas, 88.15% infiltrated and the remaining 11.85% ran off or evaporated. In addition, infiltration tests showed that the soil is mostly sandy and capable of permitting infiltration of the water precipita ted during the year studied, so the proposal to use permeable pavement at the entrance and exit of the Chico Science Tunnel is viable, minimizing flooding as well as maintenance costs for the booster pumps used by the current drainage system.
“…In addition, these runoffs are often influenced by high rates of soil impermeabilization, which decrease infiltration of water into the soil, increase flow velocity, and water volume, generating new points where flooding occurs (Aragão et al, 2017). The use of compensatory techniques for storm water management therefore has been widely suggested (Oliveira et al, 2016;Silva Junior, et al, 2017;Silva, 2018).…”
Section: Issn:1984-2295mentioning
confidence: 99%
“…Recife is one of these cities that has frequently suffered from flooding, which causes major disruptions, especially in tunnels. Such structures are constantly threatened during rainy seasons, especially when the tide is high (Cabral and Alencar, 2005;Silva Junior et al, 2017). This is because most Brazilian coastal cities are cut by canals or rivers that rise and fall with the tide.…”
Flooding in urban centers has been treated as a direct consequence of excessive rainfall, without considering the integrated functioning of the drainage system. These problems have caused engineers to propose auxiliary solutions or techniques that assist urban drainage. The objective of this study was to analy ze the technical feasibility of using compensatory measures such as permeable pavement, for tunnel accesses, as an aid to existing drainage. The soil of the unpaved regions, which represent only 16.3% of the study area, was characterized using the Beerkan method, followed by an analysis of the water balance of the region using the Hydrus-1D computational model, in order to determine the rainfall on the unpaved regions surrounding the tunnels. The water balance of this portion of the study area showed that, of the 239.69 mm.m -2 that precipitated over unpaved areas, 88.15% infiltrated and the remaining 11.85% ran off or evaporated. In addition, infiltration tests showed that the soil is mostly sandy and capable of permitting infiltration of the water precipita ted during the year studied, so the proposal to use permeable pavement at the entrance and exit of the Chico Science Tunnel is viable, minimizing flooding as well as maintenance costs for the booster pumps used by the current drainage system.
“…A falta de dependência espacial dos parâmetros de infiltração verificada foi amplamente estudada na literatura, e não se tem relatos de correlação espacial das propriedades de infiltração de água no solo em grandes distâncias (Loague;Gander,1990;Silva Junior et al 2017;Vieira;Nielsen;Biggar, 1981).…”
A infiltração é o processo de entrada de água no solo através de sua superfície. O conhecimento desse processo é vital para estabelecer as diretrizes de conservação de solo e água, planejar e delinear sistemas de irrigação, indicando a quantidade de água disponível para as plantas, calcular taxas de recarga de água subterrânea, taxas de escoamento superficial em eventos de precipitação. Para obter os dados sobre a infiltração geralmente é empregado infiltrômetros, que são utilizados em ensaios de campo, sendo o infiltrômetro de anéis concêntricos (IAC) o mais utilizado para a determinação da velocidade de infiltração básica de água no solo (VIB). Neste trabalho objetivou-se obter os dados de infiltração de uma microbacia urbana para subsidiar os dados de entrada e ajustes em modelos de escoamento superficial na bacia do Córrego Sem Nome no município de Ilha Solteira – SP, foram avaliados testes realizados em 6 pontos estabelecendo suas áreas de relações por meio de polígonos de Thiessen, entre os pontos não foi encontrada nenhuma correlação espacial, sendo os três parâmetros estudados: taxas de infiltração inicial, taxas de infiltração final e constante de decaimento, o que corrobora com a ampla literatura sobre o tema que confirma não haver correlação espacial das propriedades de infiltração em grandes distâncias, que salienta ainda mais a necessidade da obtenção de valores reais de infiltração de água no solo, de forma a determinar os valores dos parâmetros de entradas para equação de Horton.
“…Essa situação é mais agravada nas planícies urbanas costeiras, como o caso do Recife-PE, que teve seu processo de urbanização desordenado e possui uma rede de drenagem bastante vulnerável às oscilações diárias das marés, podendo provocar problemas de alagamentos na ocorrência de chuvas intensas combinadas com maré alta (Silva Junior & Silva, 2016;Silva Junior et al, 2017). Para a região do litoral do Brasil espera-se um aumento de 0,5 a 0,7 metros no NMM, até o ano de 2100, projeção baseada em séries históricas de 1986de a 2005de (IPCC, 2014.…”
Os efeitos do clima em mudança podem provocar impactos significativos no sistema de drenagem dos centros urbanos. Tal situação fica ainda mais agravada nas planícies urbanas costeiras, como a cidade do Recife-PE, que tem urbanização desordenada, pluviosidade elevada e um sistema de drenagem bastante vulnerável à variabilidade diária das marés. Nesse contexto, este estudo discute os desafios para a adaptação da infraestrutura de drenagem urbana da cidade, visando o enfrentamento às mudanças do clima. Para isso, realizou-se uma revisão de literatura que resultou no diagnóstico expedito focando: as problemáticas e peculiaridades da drenagem local; os efeitos da mudança do clima no sistema de drenagem da cidade, destacando as vulnerabilidades atuais e futuras; e as iniciativas para a mitigação dos impactos e a adaptação da infraestrutura.
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