一场飓风导致新西兰发生超80万次滑坡

Core Insights - The research report published by the New Zealand Earth Sciences Organization highlights that Cyclone Gabrielle triggered over 800,000 landslides in 2023, affecting an area of approximately 100 square kilometers, marking it as one of the most extreme landslide-inducing events on record [1] Summary by Categories Rainfall Impact - Cyclone Gabrielle brought intense rainfall that saturated soil moisture levels, causing many slopes to reach critical saturation points, making landslides inevitable [1] - Some areas experienced rainfall of up to 500 millimeters within 24 hours, exceeding historical records by more than 50% [1] Factors Influencing Landslides - Key factors influencing landslide locations include geological type, vegetation type, and slope steepness, with shrub and grassland areas being more prone to landslides compared to forested regions [1] - In regions like Hawke's Bay, the density of small shallow landslides in shrub and grassland areas reached as high as 327 occurrences per square kilometer [1] Vegetation and Landslide Protection - Native forests provide better protective capabilities against landslides compared to non-native tree species [1] - Areas where vegetation was disturbed 3 to 5 years prior to Cyclone Gabrielle were more susceptible to landslides [1] Climate Change and Future Trends - The study indicates that climate change has intensified the rainfall associated with Cyclone Gabrielle, and this trend is likely to continue [1] - The data and conclusions from this research will support the development of national landslide models to predict high-risk landslide areas and their potential impacts [1] - The research aims to provide scientific basis for future land use decisions to mitigate the impacts of such destructive disasters [1]