作　　者： ; ; ; ; ; ; ;

机构地区： 湖北省气象局

出　　处： 《气象科技》 2006年第5期553-557,共5页

摘　　要： 对湖北省200次山洪灾害个例逐时雨量及15次逐时水位、流量分析表明:山洪灾害雨量分布可归纳为单峰、双峰、多峰3种类型,其中单峰型所占比例较大;天气系统特征均表现有中尺度系统活动,单峰型主要以局地性降雨过程为主,强降雨历时短,双峰型主要以系统性降水过程为主,强降雨历时较长,多峰型主要以持续性降雨过程为主,强降雨历时长;激发山洪灾害的关键因素主要是6 h以内的雨强。 Based on the analysis of hourly rainfall in 200 mountain torrent disaster cases and the water-levels and runoff of 15 examples, it is found that the rainfall distributions in mountain torrent disasters generally can be divided into three kinds： mono-apex, bi-apex and multi-apex. The majority were the mono-apex. Mesoscale system activities are found in all of the cases. In mono-apex cases, rains are mostly local, and the heavy rains are transitory. While in bi-apex examples, rains are mainly systematic, and the heavy rain lasts for a longer time. In multi-apex cases, rains are durative, and heavy rains goes on for a long time. The key factor that triggers mountain torrents is the 6-hour rainfall intensity in most cases.

关 键 词： 山洪灾害 气象成因 雨洪相关性

领　　域： [天文地球]