惠州市鸡心石水库降雨量变化规律分析

Change of Precipitation of Jixinshi Reservoir in Huizhou

根据1966—2012年鸡心石水库雨量站的实测降雨资料,采用滑动平均法、差积曲线法等统计方法分析总结鸡心石水库的降雨变化规律:水库降雨量年内、年际变化较大;降雨量年际变化呈现丰、枯交替的周期变化;枯水期降雨量总体下降,20世纪90年代中后期以来枯水期降雨量比重偏少,年内干湿变化更加分明。

According to the rainfall data of Jixinshi Reservoir rainfall station from 1966 to 2012, by using the moving average method, Residual mass curve method and statistical method the change of precipitation of Jixinshi Reservoir have been analyzed ： the variation of annual and inter - annual precipitation is relatively large ; the variation of inter - annual precipitation has the cycle of dry and rich; the precipitation of the dry season decreased, Since the late ninety~ of the twentieth century, the precipitation of the dry season is little, and the change of dry and wet within the year become more clearly.