ZHANG Tian-feng,WANG Wei-tai,ZHANG Hong-fen,et al.The Analysis of a Storm Rainfall in Urban Water-logging and Validation of the Strength Formula[J].Journal of Chengdu University of Information Technology,2017,(02):226-230.[doi:10.16836/j.cnki.jcuit.2017.02.018]
一次城市内涝暴雨特征及强度公式验证分析
- Title:
- The Analysis of a Storm Rainfall in Urban Water-logging and Validation of the Strength Formula
- 文章编号:
- 2096-1618(2017)02-0226-05
- Keywords:
- meteorology; application of meteorological; the rainstorm; atmospheric circulation situation; the weather radar echo; verification analysis
- 分类号:
- P458.1+21.1
- 文献标志码:
- A
- 摘要:
- 为揭示强对流暴雨引起的城市内涝灾害发生机制,利用实况高空观测、自动站观测、卫星云图、雷达回波等资料,采用天气学诊断方法,对2015年8月2日造成庆阳市城市内涝的强对流暴雨天气过程影响特征进行分析。结果表明:强对流暴雨过程是发生在500～700 hPa河套中南部至青藏高原东北侧前倾槽的高低空配置形势下,冷空气沿高空槽后部下滑影响陇东地区,庆阳市上空存在明显的不稳定能量,抬升指数为负值,水汽在庆阳市东南部辐合,新一代天气雷达速度场上出现辐合区和成对的正负速度中心,回波顶高达到14 Km,致使暴雨过程降水时间集中,强度较大,造成庆阳市区部分地方发生内涝灾害,验证了城市暴雨强度公式的合理性。
- Abstract:
- In order to reveal the urban waterlogging disaster mechanism caused by strong convection rainstorm,the data of upper air, automatic station, satellite cloud imagery and Doppler radar observation,and synoptic diagnosis method t had been analyzed which happened in Qingyang city On August 2, 2015 and caused strong convection rainstorm weather processed urban waterlogging. The results were those: The strong convection rainstorm process occurred in the situation of the northeast side of Tibetan Plateau to the south of 500-700 hPa in the configuration of high and low pitch trough, cold air slid downward along the trough rear decline in Longdong area of influence, ver the city of Qingyang had obvious instability energy The LI was negative, the convergence of water vapor was in the southeastern of Qingyang, the convergence zone and center of positive and negative velocity appeared in velocity field, he ET was 14 km. And it led to the heavy rain process concentrated rainfall time, intensity bigger, caused parts of ingyang urban waterlogging disasters occur, which proved the rationality of urban rainstorm intensity formula.
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备注/Memo
收稿日期:2016-09-28 基金项目:甘肃省气象局气象科研面上资助项目(2015-06)