去年12月下旬,受西北强冷空气影响,黄河下游气温骤降,25日河口河段开始封河,由于豫、鲁两省去冬严重干旱,引黄流量大增,最大引水流量达600m~3/s。尽管在防凌调度中积极采取措施,增大三门峡水库下泄流量,但到封河时,河口利津站流量仅23m~3/s。封河流量之小前所未有。 In late December last year, due to the strong cold air in the northwest, the temperature dropped sharply in the lower reaches of the Yellow River and the closure of the river started at the mouth of the river mouth on the 25th. Due to severe winter drought in both Henan and Shandong provinces, the flow of water to the Yellow River increased greatly and the maximum water diversion flow reached 600m 3 / s. Despite the measures taken in the anti-Ling regulation actively to increase the Sanmenxia Reservoir discharge, but to the closure of the river, Lijin station estuary flow of only 23m ~ 3 / s. The closure of the river traffic is unprecedented.