江苏省典型高速公路强风和强横风时空分布特征

发布时间：2018-01-29 20:56

本文关键词： 江苏省高速公路强风强横风风压时空变化　出处：《自然灾害学报》2017年04期 　论文类型：期刊论文

【摘要】：强风特别是强横风是影响高速公路汽车安全行驶的重大交通气象灾害之一。为提高交通气象中强横风天气的预报准确率,利用江苏省典型高速公路2012~2015年交通自动天气监测系统观测数据,分析了江苏省沪宁、宿淮盐、沿海和京沪高速公路强风和强横风的时空分布特征,探讨了地理环境等因素对强风和强横风发生的影响,在此基础上,对江苏省典型高速公路的风压进行分级,揭示风压的空间分布特征。研究表明:1)强横风的日变化和季节变化规律与强风相似,一天中两者出现频率最高的时间段为12~14时;一年中7月份频率最高。2)各站点强风和强横风发生日数频率一致,均呈现沿海高速公路发生日数较高的站点最多、范围最大,宿淮盐高速公路最少、范围最小的特点。强风盛行风向与强横风盛行风向基本一致,4条高速公路整体上,偏北风频率最高,偏北向强风和横风的频率高于偏南向强风和横风,偏东向强风和横风的频率高于偏西向强风和横风。频率最高的极大风风向为22.5°,最大风风向为0°,即正北。3)除宿淮盐高速公路2012年秋季月份外,月极端风速均超过10 m/s,最大值达到22.6 m/s。4)综合考虑风向、风速等变化因素,将风压分为10级。其中风压达到黄色预警以上发生频率最高的路段为沿海高速公路的北段。5)地理环境对各高速公路不同路段强风、强横风和风压等级均有不同程度的影响,其中地形起伏、水系分布、距海远近对其影响较大。
[Abstract]:Strong wind, especially strong crosswind, is one of the major traffic meteorological disasters affecting the safe driving of freeway vehicles. In order to improve the forecasting accuracy of strong crosswind weather in traffic meteorology. Based on the observational data of the traffic automatic weather monitoring system for typical expressway of Jiangsu Province from 2012 to 2015, the paper analyzes the salt in Huning and Suhuai, Jiangsu Province. The spatial and temporal distribution characteristics of strong wind and strong crosswind in coastal and Beijing-Shanghai expressway are discussed. The influence of geographical environment on the occurrence of strong wind and strong crosswind is discussed. On this basis, the wind pressure of typical highway in Jiangsu Province is classified. The study shows that the diurnal and seasonal variation of strong cross wind is similar to that of strong wind. In July, the frequency of each station is the highest. 2) the frequency of strong wind and strong cross wind are the same. The stations with the highest number of days and the largest range on the coastal highway, and the Suhuai salt highway have the least frequency. On the whole, the frequency of north wind is the highest, and the frequency of north wind and cross wind is higher than that of south direction and cross wind. The frequency of eastward strong wind and crosswind is higher than that of westward strong wind and crosswind. The maximum wind direction of the highest frequency is 22.5 掳, and the most windy wind direction is 0 掳. That is Zhengbei. 3) except Suhuai Salt Expressway in the autumn month of 2012, the monthly extreme wind speed is more than 10 m / s, and the maximum value is 22. 6 m / s 路s. 4) the wind direction is considered synthetically. Wind speed and other factors, the wind pressure is divided into 10 grades. The section with the highest frequency of wind pressure above yellow warning is the northern section of coastal expressway. 5) the geographical environment is strong wind on different sections of highway. The strong cross wind and wind pressure grade have different degrees of influence, among which the topographic fluctuation, the distribution of water system and distance from the sea have great influence on it.
【作者单位】：南京信息工程大学气象灾害预报预警与评估协同创新中心;中国气象局交通气象重点开放实验室;贵州省气象服务中心;
【基金】：“十二五”国家科技支撑计划(2014BAG01B01) 国家公益性行业(气象)科研专项(GYHY201306043,GYHY201406029) 江苏省科技支撑计划(BE2015732) 江苏省气象局北极阁基金(BJG201404)~~
【分类号】：P429;U492.8
【正文快照】： Supported by:“12th Five-Year”National Science and Technology Support Program(2014BAG01B01);Special Research Fund for Meteorology inthe Public Interest of China(GYHY201306043,GYHY201406029);Science and Technology Support Program of Jiangsu Province(BE20

【相似文献】