摘要
玉溪市地质灾害类型包括滑坡、崩塌、泥石流、地面塌陷、地裂缝、不稳定斜坡,80%以上灾害主要发生于雨季5～10月,丰水年尤为突出。其中西部的新平哀牢山一带地质灾害发生次数最多,损失最重,南盘江及湖盆地区灾害发生相对较少。通过分析历史上21次地质灾害发生与降水的关系发现,地质构造、地形地貌、岩土体性质结构是地质灾害发生的基础条件,而降雨是诱发地质灾害的主要因素,特别是当日和前3日暴雨影响最为严重,其次不合理的采矿、修路和水利设施建设是加剧和诱发地质灾害发生的人为因素。
The geological hazard type of Yuxi City includes landslides, avalanches, landslides, ground subsidence, ground fissures, unstable slopes. 80% of disasters occurs in rainy seasons （May to October）, especially in wet years. Geological hazards occur most frequently and seriously in Ailao Mountain of Xinping which is in the west of Yuxi, while the frequency is relatively fewer in Nanpan River and Hupen area. By analyzing the relation- ship between precipitation and 21 times of geological hazards in history, we find that geological structure, land- form, geotechnical discriminate structure are the basic conditions of geological hazard, and rainfall is the main factor initiating geologic hazard, and heavy rain which falls in the day of geologic hazard occurring or less than 3 days before geologic hazard happened has the greatest impact. Secondly, unreasonable mining, road construction and construction of water conservancy facilities are the human factors which could Exacerbate and induce geological hazards.
出处
《云南地理环境研究》
2012年第5期97-100,共4页
Yunnan Geographic Environment Research
基金
中国气象局"玉溪市精细化地质灾害气象预警服务系统"一期建设项目资助
关键词
玉溪市
地质灾害
Yuxi City
geological hazards
