Resumo Este trabalho avaliou, através de simulações, o impacto da urbanização no escoamento superficial na região da Gleba Palhano (Londrina/PR), em que as condições de uso e ocupação do solo mudaram de forma drástica em apenas duas décadas. Foram utilizados modelos hidrológicos para a obtenção dos hietogramas e hidrogramas. Os hietogramas foram gerados a partir dos valores de chuvas intensas e os hidrogramas através do hietograma e da avaliação das condições do solo, anterior à urbanização (1991) e posterior (2013), através do modelo do SCS. As variáveis de entrada foram as condições de uso e ocupação do solo, características e umidade do solo, tempo de retorno e de duração das chuvas. Observou-se que após a urbanização ocorreu o aumento do volume escoado superficialmente na área estudada, uma vez que este é altamente influenciado pelas condições de uso e ocupação do solo. Os resultados da simulação para os dois cenários analisados demonstraram, de forma quantitativa, que o aumento do escoamento superficial foi, respectivamente, para tempos de duração da precipitação de 15minutos, 30minutos, 1hora e 3horas: 139%,
This study analyzed the changes in land use and cover of Ribeirão Cambé watershed (Londrina /PR), between 1975 and 2015, and evaluated how these changes impact on the runoff volume. For the classification of soil use and cover were used satellite images from the Landsat series (1-MMS, 5-TM and 8-OLI), which were acquired for free from the INPE/DGI website. The classification was made by the SPRING program, it was used to establish four themes of soil use and cover: urban, dense vegetation, underbrush and exposed soil. The CN value was obtained from the CN tables of SCS for urban and suburban basins. Morphological characterization of Ribeirão Cambé basin indicates low probability of flooding. Using satellite images, it was possible to affirm that significant changes happened in the soil use and cover of this basin, having grown 150% in 40 years, with the highest growth rates occurring in the first analyzed decades, 42%, 33%, 18% and 11%, respectively. Thus, the conclusion is that changes in soil use and cover in river basins reflect on the runoff, evidentiating the need of discussion about urban planning and flood control.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.