摘要
利用时间序列的研究方法对黄河干流径流量的暂态成分进行了分析 ,用小波方法研究了径流量的时频结构 ,结果表明 :黄河上游水量与下游水量具有极好的一致性 ,径流量没有明显的下降趋势 ,径流量也没有突变现象 ,但基流径流量例外 ;径流量有准 10a、3～ 4a左右的周期变化。
The paper has analyzed transient component of flow-off mass of rivers' main current according to Yellow River by using of the reserach method of time sequence, and researached time-frequency structure of flow-off mass by using of wavelet transform. The result shows that the water coming from Yellow River upstream is well consistent with precipitaitons of its downstream, flow-off mass has not obvious trend of decline and break phenomena except for basic flow-off mass. Periodic variations of about 10a and 3-4a of flow-off mass are found by using of wavelet analysis. The paper has also forecasted flow-off mass using mean generating function (MGF) model whose modeling ability is excellent.
出处
《气象科学》
CSCD
北大核心
2003年第2期200-208,共9页
Journal of the Meteorological Sciences
基金
安徽省自然基金 2 0 0 3年项目的资助
项目编号 :0 3 0 45 40 2
关键词
黄河径流量
暂态成分
时频分析
径流预测
Flow-off mass of Yellow River Transient component Time-frequency structure Flow-off mass forecast
