永修县滨湖区主汛期降雨特征分析

Analysis of rainfall features in main flood season in Yongxiu County

主汛期降雨事件是造成洪涝灾害的主要因子.根据永修县滨湖区1950—2009年降雨统计资料,运用线性趋势、累计距平和滑动t-检验法,对永修县主汛期降雨变化趋势及突变特性进行分析,结果表明:近60年来,永修县滨湖区主汛期降雨量,在周期性波动中呈减少趋势,在1977年附近发生了一次明显突变.

Based on the statistic rainfall data from 1950 to 2009 in Yongxiu County,the changing trend and abrupt change of rainfall in the main flood season was analyzed with the linear tendency method,accumulation mean and moving t-test method.The results show that the decrease tendency of the main flood season rainfall was more obvious,with the jumping point occurring in 1977 in the recent 60 years.