Extreme Precipitation Events and Management Strategy in Beijing
The financing disaster losses caused by extreme precipitation extremes is becoming increasingly se-rious with the accelerating urbanization of Beijing,therefore an effective way to avoid enormous losses is to make corresponding risk management strategies.In this study,we first determine site-level rainfall threshold using per-centile method,and then define four precipitation indexes to study the extreme rainfall events in Beijing,the data-set consists of daily-observed precipitation from 20 meteorological stations from 1981 to 2014.Our results show that,the distribution of extreme rain threshold coherent with the amount and intensity of extreme precipitation,as well as annual maximum rainfall,which mainly occur central and northeast of the city,hence these areas should be paid more attention when take risk management for their high risk caused by heavy rain.Contrarily,the mountain area in west and northwest Beijing does not experience too much loss even with maximum days of extreme precipita-tion;this is caused by particular topography and population distribution.Given the city’s current emergency man-agement,we suggest to improve the precipitation risk management strategy from improving the ability of early warn-ing and forecasting,strengthening the city infrastructure construction and improving the public’s ability of emergen-cy avoiding.
国家科技期刊平台
NSTL
万方数据
维普
