近50年黄河上游径流量与气候变化特征研究

根据1956-2010年唐乃亥水文站逐月径流量资料和1961-2009年黄河上游兴海、泽库、玛沁、达日、久治、玛多6个代表站的降水量、气温资料,分析了唐乃亥站径流量与黄河上游地区降水和气温的气候变化特征及其关系.结果表明:春、夏、秋、冬季的径流量分别占年径流量的14.9%、2.9%、34.7%、7.5%;唐乃亥站年和四...

VARIATIONS OF TANGNAIHAI RUNOFF AND PRECIPITATION AND TEMPERATURE IN THE UPPER REACH OF THE YELLOW RIVER

By use of the 1956—2010 monthly Tangnaihai runoffs and 1961—2009 monthly precipitation and temperature data of 6 stations（Xinghai,Zeku,Maqin,Dari,Jiuzhi and Maduo） in the upper reach of the Yellow River,the variations of Tangnaihai runoff and precipitation and temperature in the upper reach of the Yellow River are studied.Results show that Tangnaihai runoffs in spring,summer,autumn and winter account for 14.9%,42.9%,34.7%,and 7.5% of the annual runoff,respectively.The runoffs of annual and four seasons have 4,6,8 and 16 a periodic features.The runoffs are less from 1990 to 2002,and have increasing trends after 2003.The precipitation of annual,summer and autumn is less than the normal from 1990 to 2002,and more than the normal after 2003.The temperature linear tendencies of annual,spring,summer,autumn and winter are 0.36,0.23,0.27,0.37 and 0.60 ℃/（10 a）,respectively.Tangnaihai annual,summer and autumn runoffs relate closely with precipitation in the upper reach of the Yellow River.There is a significant negative relationship between Tangnaihai spring runoff and temperature in the upper reach of the Yellow River.