金沙江流域强降水天气特征分析  

Analysis of strong precipitation characteristics in Jinsha River Basin

作　　者：李进[1] 陈良华[1] 李波[1] 徐卫立[1] 张俊[1] 

机构地区：[1]中国长江电力股份有限公司,湖北宜昌443001

出　　处：《人民长江》2013年第19期36-39,共4页Yangtze River

摘　　要：为了研究金沙江流域的强降水天气特征,找出各种气象条件下降水的时空分布特征和量级规律,定义了金沙江流域强降水标准,并对2005 ～2011年金沙江流域强降水天气资料进行了普查与特征分析.结果表明,约50％的金沙江流域强降水具有其独立性.应用气象学原理,归纳总结出影响金沙江流域强降水的天气系统主要有：川滇切变线、两高间辐合、西南涡和孟加拉湾风暴.详细分析了这4种天气系统对金沙江流域强降水的影响,4种天气系统的强降水分别占强降水总数的60％,19％,10％和11％.For studying strong precipitation characteristics in Jinsha River Basin, especially the temporal and spatial distribution law and quantity of precipitation, on the basis of defining strong precipitation standard, we carry out investigation and characteristics analysis on the strong precipitation weather in the basin from 2005 - 2011. Independence is found for approximately 50% strong precipitation events. Based on synoptic meteorology, the weather systems influencing the precipitation in Jinsha River Basin can be summarized as follow： Sichuan - Yunnan shear line, convergence between two high - pressure, southwest vortex and Bengal Bay storm, respectively accounting for 60% , 19% , 10% and 11% of the total number of the strong precipitation events, further the influences on the strong precipitation of Jinsha River Basin induced by the four weather systems are analyzed.

关 键 词：强降水 天气系统 特征分析 金沙江 

分 类 号：TV125[水利工程—水文学及水资源]