Key Laboratory for Digital Land and Resources of Jiangxi Province, East China University of Technology, Nanchang, 330013, China; School of Earth Sciences, East China University of Technology, Nanchang, 330013, China.
Mineral Resources Guarantee Center of Jiangxi Province, Nanchang, 330025, China.
Sci Total Environ. 2022 Aug 15;834:155337. doi: 10.1016/j.scitotenv.2022.155337. Epub 2022 Apr 20.
Fatal geohazards result in severe losses of life and property worldwide, thus urging many large-scale studies of such geohazards. Further research on hotspots prone to fatal geohazard identified in national-scale studies is critical for government geohazard prevention. It has been pointed out that more detailed small-scale (sub-national) studies are essential for the hotspots (e.g., Jiangxi Province) identified in national-scale studies. However, there are only a few small-scale studies of hotspots and earlier studies have rarely delved into a thorough and detailed analysis of hotspots. In addition, previous studies of fatal geohazards have failed to offer specific geohazard prevention advice, significant for geohazard control policies. To bridge these gaps, this study took advantage of the Jiangxi Inventory of Fatal Geohazards (JIFGH) and employed spatial analysis and the geographical detector to analyze the spatiotemporal characteristics and causes and present prevention advice on fatal geohazards in Jiangxi Province. The study also analyzes the importance of provincial-scale (first-level administrative scale) studies for hotspots identified in national-scale studies. JIFGH includes 386 non-seismically triggered fatal geohazards that caused a total of 979 fatalities in the 1960-2020 period. The temporal trend of fatal geohazards in Jiangxi Province is mainly affected by rainfall and the government geohazard prevention measures. The causes of most fatal geohazards in Jiangxi Province include (i) slope-cutting activities in house construction projects that create steep slopes prone to failure, which threaten the vulnerable residents and buildings nearby and (ii) rainfall that triggers failures of cut slopes. This study not only proposes geohazard prevention advice for Jiangxi Province and tectonically stable areas but also analyzes the significance of provincial-scale studies of hotspots identified in national-scale studies. Therefore, this study contributes to the prevention of fatal geohazards in Jiangxi Province and tectonically stable areas, while also providing an essential reference for other studies of fatal geohazards.
致命的地质灾害在全球范围内造成了严重的生命和财产损失，因此促使许多人对这类地质灾害进行了大量的研究。对国家尺度研究中确定的易发生致命地质灾害的热点地区进行进一步研究，对于政府的地质灾害防治至关重要。有人指出，对于国家尺度研究中确定的热点地区（例如江西省），需要进行更详细的小规模（国家以下）研究。然而，对于热点地区的小规模研究很少，早期的研究也很少深入分析热点地区。此外，以前对致命地质灾害的研究没有提供具体的地质灾害防治建议，这对于地质灾害控制政策非常重要。为了弥补这些差距，本研究利用了《江西省致命地质灾害名录》（JIFGH），采用空间分析和地理探测器分析了江西省致命地质灾害的时空特征、成因，并提出了防治建议。本研究还分析了省级（一级行政尺度）研究对国家尺度研究中确定的热点地区的重要性。JIFGH 包括 1960-2020 年间发生的 386 起非地震触发的致命地质灾害，共造成 979 人死亡。江西省致命地质灾害的时间趋势主要受降雨和政府地质灾害防治措施的影响。江西省大多数致命地质灾害的成因包括：（i）房屋建设项目中的边坡开挖活动导致边坡陡峭，易发生失稳，对附近脆弱的居民和建筑物构成威胁；（ii）降雨引发的边坡失稳。本研究不仅为江西省和构造稳定地区提出了地质灾害防治建议，还分析了省级研究对国家尺度研究中确定的热点地区的重要性。因此，本研究有助于预防江西省和构造稳定地区的致命地质灾害，并为其他致命地质灾害研究提供了重要参考。
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