湖南省地质灾害发生与降水的耦合关系研究
Research on the coupling relationship between the occurrence of geological disasters and precipitation in Hunan Province
段中满 1张莉华 1薛云 2何明 1陈吉祥1
作者信息
- 1. 湖南省自然资源事务中心,湖南 长沙 410118
- 2. 湖南城市学院 市政与测绘工程学院,湖南 益阳 413000
- 折叠
摘要
湖南省受降水引发的地质灾害频发,然而,前人对湖南省地质灾害发生与降水的耦合关系却研究较少,难以利用降水预报信息精准开展地质灾害预报工作.本文通过利用湖南省地质灾害和相应降水资料,采用统计分析、相关性分析、频次分析等方法进行综合分析,得出如下结论:(1)降水与地质灾害发生有着极其密切的关系,湖南省年内降水量1300～1600 mm地区是地质灾害发育最密集区,每年4-7月为地质灾害高发时段.年平均降水量大于1600 mm、月平均降水量200 mm的区域,特别是突然性的短时高强度降水和长时间的过程性降水,易引发地质灾害;(2)暴雨频次和降雨量与崩滑流灾害的发生密切相关,特别是在暴雨频次、降雨量达到一定阈值时,崩滑流灾害呈现集中爆发的趋势,研究结果可为湖南省地质灾害预报提供技术支持,有助于提高对地质灾害的精准预警和应对能力,更好地保护人民群众生命财产安全.
Abstract
Geological disasters in Hunan Province are frequently triggered by rainfall.However,there is little research on the coupling relationship between the occurrence of geological disasters and rainfall in Hunan Province,making it difficult to use rainfall forecast information for accurate geological disaster forecasting.In order to explore the coupling relationship between geological disasters and precipitation in Hunan Province,statisti-cal analysis,correlation analysis,frequency analysis and other methods were used to comprehensively analyze the geological disasters and corresponding precipitation data in Hunan Province.The following conclusions were drawn:(1)precipitation and geological disasters have an extremely close relationship.The area with an annual precipitation of 1300-1600 mm in Hunan Province is the most densely developed area for geological disasters.The period from April to July each year is the high-incidence period for geological disasters.Areas with an average annual precipitation greater than 1,600 mm and an average monthly precipitation of 200 mm are prone to geological disasters,especially sudden,short-term,high-intensity precipitation and long-term process precipitation.(2)The frequency and volume of heavy rainfall are closely related to the occurrence of landslide and debris flow disasters.Especially when the frequency and volume of heavy rainfall reach certain thresholds,there is a trend of concentrated outbreaks of landslide and debris flow disasters.The research results can provide technical support for the prediction of geological disasters in Hunan Province,help to improve the ability to accurately warn and respond to geological disasters,and better protect the safety of people's lives and property.
关键词
地质灾害/降水/耦合/湖南省Key words
geological hazards/precipitation/coupling/Hunan Province引用本文复制引用
基金项目
湖南省自然资源厅项目(2021Z04)
湖南省教育厅项目(21A0510)
湖南省教育厅项目(22C0510)
湖南省大学生创新创业训练计划项目(2022-174-3967)
出版年
2024
NETL
NSTL
万方数据