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In recent years, extreme precipitation events have become increasingly frequent and widespread largely due to global warming and the urban rain island effect. Intense rainstorms often trigger secondary hazards such as floods, urban waterlogging, debris flows and landslides, resulting in multi-hazard scenarios and the loss amplification effect. These rainstorm-induced cascading hazardsRainstorm-induced cascading hazards significantly snowball the challenges of hazard risk prevention and emergency response. This study focuses on the Daqing River basin in China and initially develops a historical hazard dataset of rainstorm and its secondary hazards across 47 county-level administrative units using internet data miningData mining and generative AIGenerative AI techniques. Subsequently, the spatial distribution of diverse types of rainstorm-induced cascading hazardsRainstorm-induced cascading hazards is analyzed. The loss amplification coefficient is finally calculated from six loss dimensions—affected population, fatalities and missing persons, emergency relocations, collapsed houses, affected crop area and direct economic losses—to quantitatively examine the loss amplification effect of rainstorm-induced cascading hazardsRainstorm-induced cascading hazards. Results show that from 2010 to 2024, a total of 404 rainstorm-induced cascading hazardRainstorm-induced cascading hazards events occurred in the Daqing River basin. Among them, the rainstorm-urban waterlogging cascade was the most frequent (123 times), followed by the rainstorm-landslide cascade (121 times). The frequency of rainstorm-induced cascading hazardsRainstorm-induced cascading hazards in the central and eastern parts of the basin was significantly higher than in the west, with a marked spatial concentration in Baoding City in the central basin. The loss amplification coefficients ranged from 1.67 to 4.62 for two-hazard cascades (e.g., rainstorm-urban waterlogging, rainstorm-flood, rainstorm-landslide and rainstorm-debris flow), and from 3.06 to 6.03 for three-hazard cascades (e.g., rainstorm-flood-landslide and rainstorm-flood-debris flow). The amplification effect was particularly pronounced in rainstorm-landslide among two-hazard cascades and rainstorm-flood-debris flow cascades among three-hazard cascades.

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Spatial Distribution and Loss Amplification Effect of Rainstorm-Induced Cascading Hazards in the Daqing River Basin, China

  • 会议论文

  • 发表日期：

    2026年

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  • Xiangxiang Jiang,
  • Wei Fang,
  • Qiang Huang,
  • Quan Quan,
  • Shengce Jia,
  • Jie Zhang,
  • Jianan Shang,
  • Xin Xu,
  • Liangbo Zhang

摘要

In recent years, extreme precipitation events have become increasingly frequent and widespread largely due to global warming and the urban rain island effect. Intense rainstorms often trigger secondary hazards such as floods, urban waterlogging, debris flows and landslides, resulting in multi-hazard scenarios and the loss amplification effect. These rainstorm-induced cascading hazardsRainstorm-induced cascading hazards significantly snowball the challenges of hazard risk prevention and emergency response. This study focuses on the Daqing River basin in China and initially develops a historical hazard dataset of rainstorm and its secondary hazards across 47 county-level administrative units using internet data miningData mining and generative AIGenerative AI techniques. Subsequently, the spatial distribution of diverse types of rainstorm-induced cascading hazardsRainstorm-induced cascading hazards is analyzed. The loss amplification coefficient is finally calculated from six loss dimensions—affected population, fatalities and missing persons, emergency relocations, collapsed houses, affected crop area and direct economic losses—to quantitatively examine the loss amplification effect of rainstorm-induced cascading hazardsRainstorm-induced cascading hazards. Results show that from 2010 to 2024, a total of 404 rainstorm-induced cascading hazardRainstorm-induced cascading hazards events occurred in the Daqing River basin. Among them, the rainstorm-urban waterlogging cascade was the most frequent (123 times), followed by the rainstorm-landslide cascade (121 times). The frequency of rainstorm-induced cascading hazardsRainstorm-induced cascading hazards in the central and eastern parts of the basin was significantly higher than in the west, with a marked spatial concentration in Baoding City in the central basin. The loss amplification coefficients ranged from 1.67 to 4.62 for two-hazard cascades (e.g., rainstorm-urban waterlogging, rainstorm-flood, rainstorm-landslide and rainstorm-debris flow), and from 3.06 to 6.03 for three-hazard cascades (e.g., rainstorm-flood-landslide and rainstorm-flood-debris flow). The amplification effect was particularly pronounced in rainstorm-landslide among two-hazard cascades and rainstorm-flood-debris flow cascades among three-hazard cascades.