关键词: 突发地质灾害;降雨强度指数;突发地质灾害响应指数;案例对比分析法;指数关系;北京市;

Abstract: Heavy rainfall is the main inducer of emergency geologic disasters, and different characteristics of heavy rainfall induce different quantities of emergency geologic disasters.The study on the quantitative relationship between heavy rainfall intensity and emergency geological disasters has become one of the important breakthrough points in disaster prevention and mitigation.Based on the case analysis method, we analyze the characteristics of three heavy storms and the geo-disasters triggered by them in Beijing City and propose two indexes, the intensity index of heavy storms and the response index of emergency geo-disaster.Based on the two indexes, we study the quantitative relation between rainfall intensity and the number of emergency geo-disasters.The results showed that there was a well exponential relationship between the rainfall intensity and geo-disaster responding indexes, indicating that rainfalls with high intensity indexes had a large capacity to induce geo-disasters.The results can provide primary scientific evidence for the effective work deployment for geo-disaster reduction and mitigation, and as a technique support for increasing the efficiency of disaster prevention and loss reduction.

Key words: unexpected geo-disasters; rainfall intensity index; response index of emergency geological disaster; case analysis method; exponential relationship; Beijing City;