云南地区交通系统地震灾害损失特征

Characteristics of Earthquake Disaster Loss of Transportation System in Yunnan Province

对1998—2018年云南破坏性地震事件中的交通系统震害损失数据进行统计和空间分析,研究云南地区交通系统震害损失规律和区域差异;基于云南交通系统历史地震震害,总结云南地区交通系统震害特征。结果表明:①云南地区交通系统震害损失随震级的增大而增加,但二者并不是简单的线性关系,而是呈二阶多项式关系;②云南地区交通系统震害损失区域差异显著,在相同地震震级和烈度下,表现为滇东北地区最高、滇西地区次之、滇南地区相对较低;③地震诱发的地质灾害是加重交通系统震害、导致交通中断的重要原因。

Based on the statistical and spatial analysis of earthquake disaster loss data of transportation system in Yunnan from 1998 to 2018,the law and regional difference of economic loss caused by earthquake disaster of transportation system are studied.Based on the seismic damage data of transportation system of historical earthquakes in Yunnan,the earthquake damage characteristics of transportation system are summarized.The results show that:①The earthquake damage loss of transportation system increases with the increase of earthquake magnitude in Yunnan.And the relationship between them is a second-order polynomial rather than linear.②The regional difference of earthquake damage loss of transportation system is obvious in Yunnan.And in the case of the same magnitude and earthquake intensity,the economic loss is the largest in Northeast Yunnan,that is the second in West Yunnan,and that is the smallest in South Yunnan.③The geological disasters induced by earthquake are the important reasons for aggravation of earthquake disaster of transportation system and traffic disruption.