Geological Disaster: An Overview

Chen, Weitao; Zhong, Cheng; Qin, Xuwen; Wang, Lizhe

doi:10.1007/978-981-99-5822-1_1

Cited by 1 publication

(1 citation statement)

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“…China stands as one of the nations most significantly impacted by geomorphological disasters, with losses attributed to these events representing more than 35% of the overall losses incurred from various natural calamities [3][4][5]. In geomorphological incidents, collapses, landslides, debris flows, and engineering incidents induced by human activities account for more than half of the losses, amounting to approximately 20 billion yuan annually [6]. Owing to annual incidents, the complex and variable topography, meteorology, and hydrology along highways contribute to significant losses and safety hazards [7,8].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Spatio-Temporal Trends of Geomorphological Incidents Induced by Precipitation on Chinese Highways

Zhang,

Tian,

Song

2024

Atmosphere

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The spatiotemporal distribution of geomorphological incidents was examined in the present study, including the characteristics of obstruction distances and durations, by utilizing nationwide incident mitigation data and precipitation observation records from the period spanning 2019 to 2022. By comparing rainfall features over different temporal scales across various regions, the aim of the present study was to enhance the current comprehension of the patterns through which regional precipitation initiates incidents on highways by comparing rainfall characteristics over distinct temporal scales across diverse geographical areas. The findings indicate that: (1) The spatial distribution of highway incidents in China is significantly correlated with regional natural environments, predominantly concentrated in the southern parts of the country’s second and third topographical terraces. The temporal distribution closely aligns with annual and monthly precipitation patterns, with the majority of occurrences taking place from June to September. Further, notable disparities in the distribution of highway-related incidents were observed among counties across most provinces; (2) National highways experience a notably higher frequency of incidents than expressways and provincial roads, with most obstruction lengths concentrated within 1 km and durations predominantly under 3 days; (3) The probability of daily rainfall inducing highway incidents is distinctly higher than that of short-duration rainfall, with eastern and southern China experiencing significantly greater inducing precipitation volumes than other regions. The majority of areas are susceptible to incidents within a 3-day window following heavy rainfall or within 24 h after intense short-duration rainfall. Moreover, it is observed that incidents are more closely associated with extreme precipitation occurring within a single day; (4) There is a certain lag between the timing of incidents and the occurrence of extreme short-duration heavy rainfall, with the highest frequency of incidents coinciding with continuous rainfall periods of 3 to 6 days.

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