摘要
本文利用葛州坝、唐乃亥的月平均径流量资料分析了长江、黄河的径流量时变特征。结果表明：葛州坝和唐乃亥的径流量存在明显的丰、枯交替的周期性变化，但葛州坝、唐乃亥的周期性变化各有所不同。唐乃亥径流量存在７．４年和１８．５年的显著周期，而葛州坝径流量存在１５．１４年和７．０７年的显著周期；唐乃亥径流量的持续（距平符号不变）时间较葛州坝径流量的持续时间长，而葛州坝径流量月变率比唐乃亥的月变率小；葛州坝的多年月平均值呈单位型，而唐乃亥径流量的多年月平均值呈双峰型。这种双峰型与西太平洋副热带高压的活动密切相关。最后，通过分析唐乃亥径流量与前期地温场的关系发现，丰水段与前期高地温对应，枯水段和前期低地温对应。
Based on monthly mean flow-off data at Tang Naihai and Ge Zhouba . the characteristics of the temporal variations of flow off are analysed. The results indi- cate that there are periodic variations of high flow and low flow, and there are different characteristics in different places. At Tang Naihai , there are the dominant periods of 7.4 and 18.5 years, and there are the dominant periods of 15. 14 and 7.07 years at Ge Zhouba. The duration of flow-off departure (the signs of departure are same) at Tang Naibai is longer than that at Ge Zhouba, the monthly variability of the flow-off atTang Naibai is larger than that at Ge Zhouba.The monthly variations of multi-years mean flow-off are a single peak characteristic at Ge Zhouba, but at Tang Naihai, the monthly variations of multi-years mean Dow-off are double peaks, the double peak characteristic at Tang Naihai is related to the movement of the West Pacific Subtropical High. At last, the relationship between the flow-off at Tang Naihai and the departure of sod temperature of the area are also analysed , it is found that high flow years corre- spond to high Soil temperature, and low now years correspond to low soil temperature.
出处
《高原气象》
CSCD
北大核心
1995年第1期19-27,共9页
Plateau Meteorology
基金
中国科学院KY-85-10项目资助
