摘要
利用1961—2013年辽宁省25个台站逐时降水资料,分析了辽宁省夏季降水时数、强度以及极端强降水时数、强度的空间分布特点及变化趋势。结果表明:辽宁省夏季平均降水时数呈减少趋势,但降水强度呈增加趋势;夏季平均极端强降水时数和降水强度均呈增加趋势,尤其在汛期7月极端强降水强度增加趋势明显。极端降水事件的增多,会导致由其引起的灾害性事件的增多,因此研究辽宁省夏季降水时空变化分布特征,对汛期强降水集中地区的防灾减灾工作具有十分重要的意义。
Based on the hourly precipitation data of 25 stations of Liaoning Province from 1961 to 2013 ,the variation trend and spatial distribution of the frequency and hourly intensities as well as the frequency and intensity of extreme precipitation were analyzed.The results showed that the trend of precipition frequencies were decreased in summer, but the trend of intensity of hourly precipitation was increased.The frequencies of extreme hourly precipitation were increased in summer ,while the intensity of extreme hourly precipitation was increased, and the trend was especially obvious in July, this meant the extreme precipitation events in Liaoning Province was increased and the related disaster may be increased.Therefore, the research of variation trend and spatial distribution of the hourly precipitation had extremely significance to the prevention and reduction of flood disaster in Liaoning Province.
出处
《现代农业科技》
2016年第10期205-209,共5页
Modern Agricultural Science and Technology
基金
辽宁省气象局支撑项目"MAPFS系统在辽宁月内重要过程预测中的应用及检验"
关键词
小时降水
降水强度
辽宁省
1961-2013年
hourly precipitation frequencies
precipitation intensity
Liaoning Province
1961--2013
