摘要
以黄河沿—唐乃亥河段实测资料为基础,分析了该河段水沙条件的变化特点。结果表明:与1970—1996年年均水、沙量相比,1997—2006年来水量、来沙量减幅分别为15.7%～76.4%和22.6%～81.1%,沙量的减幅大于水量的;唐乃亥站汛期87.3%的水流过程主要集中在小于1 000 m3/s的小流量级,洪峰流量大于1 000 m3/s的年均洪水场次由3.56次减少到2.70次,最大洪峰流量由5 450 m3/s减小到2 750 m3/s。
Based on the observed data of Huangheyan-Tangnaihai reach, the varying characteristics of water and sediment were analyzed from 1997 to 2006. The results show that, the amount of runoff and sediment are reduced 15.7% -76.4% and 22.6% -81. 1% respectively compared with the annual amount of runoff and sediment from 1970 to 1996, the percentage of decreasing of the sediment is bigger than that of the water decreased. The most daily flow magnitude is less than 1000 m3/s which occupying 87.3% of the flow in flood season at Tangnaihai. The events of flood which is more than 1 000 m3/s has decreased from 3.56 per year to 2.70 and the maximum flood peak discharge has decreased from 5 450 m3/s to 2 750 m3/s.
出处
《人民黄河》
CAS
北大核心
2013年第4期14-15,117,共3页
Yellow River
基金
国家"973"计划项目(2011CB403306)
关键词
水沙变化
洪峰流量
黄河沿一唐乃亥河段
黄河
water and sediment characteristics
flood peak discharge
Huangheyan - Tangnaihai reach
Yellow River
