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<p>Climate change has increased the likelihood of extreme weather events, increasing the possibility of climate-related disasters that can cause damage to infrastructure. This study aims to investigate the effects of extreme weather events on infrastructure in the center-south region of Brazil. The process of selecting municipalities to be used as case studies followed the following steps: list of municipalities with high disaster records; list of records of damage to works resulting from disasters; and then analysis of the series of precipitation monitoring data, verifying whether its extension is representative for dimensioning civil works. Data on disasters were obtained from records in the Disaster Information Forms available through the Civil Defense Integrated Disaster Information System (S2ID) from January 2012 and January 2017. Among the municipalities most affected by event extremes, the region comprising the municipalities of Papanduva, Itaiópolis, Mafra, Rio Negrinho, and São Bento do Sul were selected for this study. Among the most affected infrastructure, roads had the most damage, accounting for 27% of occurrences, particularly local roads. This way, in this study, differences between the projected rainfall intensity values obtained through intensity–duration–frequency (IDF) relationships and those obtained by disaggregating historical data of maximum daily precipitation were examined to determine the influence of methodologies on rainfall projections for designing the drainage systems of the most vulnerable infrastructure. For a standard section of a feeder road, a gutter road and retention basins were designed using both design rainfall intensity estimation approaches. The comparison between these methodologies indicated that the IDF relationships enable the efficient sizing of retention basins. However, they are inadequate for sizing gutter roads capable of adequately draining the water volume resulting from extreme events. Thus, new regulations should be established, and the existing ones should be reviewed for designing drainage systems for local roads considering the effects of future climate change.</p>

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Climatic extremes and their influence on the design of local road drainage systems in central-southern Brazil

  • 期刊论文

  • 发表日期：

    2025年1月11日

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  • Ayrton Renan de Oliveira Ferreira,
  • José Antonio Guarienti,
  • Aleska Kaufmann Almeida,
  • Isabel Kaufmann de Almeida

摘要

Climate change has increased the likelihood of extreme weather events, increasing the possibility of climate-related disasters that can cause damage to infrastructure. This study aims to investigate the effects of extreme weather events on infrastructure in the center-south region of Brazil. The process of selecting municipalities to be used as case studies followed the following steps: list of municipalities with high disaster records; list of records of damage to works resulting from disasters; and then analysis of the series of precipitation monitoring data, verifying whether its extension is representative for dimensioning civil works. Data on disasters were obtained from records in the Disaster Information Forms available through the Civil Defense Integrated Disaster Information System (S2ID) from January 2012 and January 2017. Among the municipalities most affected by event extremes, the region comprising the municipalities of Papanduva, Itaiópolis, Mafra, Rio Negrinho, and São Bento do Sul were selected for this study. Among the most affected infrastructure, roads had the most damage, accounting for 27% of occurrences, particularly local roads. This way, in this study, differences between the projected rainfall intensity values obtained through intensity–duration–frequency (IDF) relationships and those obtained by disaggregating historical data of maximum daily precipitation were examined to determine the influence of methodologies on rainfall projections for designing the drainage systems of the most vulnerable infrastructure. For a standard section of a feeder road, a gutter road and retention basins were designed using both design rainfall intensity estimation approaches. The comparison between these methodologies indicated that the IDF relationships enable the efficient sizing of retention basins. However, they are inadequate for sizing gutter roads capable of adequately draining the water volume resulting from extreme events. Thus, new regulations should be established, and the existing ones should be reviewed for designing drainage systems for local roads considering the effects of future climate change.