一九八四年凌期,上游来水偏丰,下游气温偏低,凌情发展形势较为严重。自元月四日下游开始封河,二月八日最上封河至山东省郓城河段伟庄险工,封河总长330.3公里。开河期气温回升缓慢,水力作用小,融冰开河过程长,至三月九日主溜开通,封冻历时达六十六天,冰量4000万立米。是历年来开河较晚的年份。 In 1984, there was ample supply of water in the upper reaches and low temperatures in the lower reaches, causing a serious development of the development of the ice conditions. Since January 4, the lower reaches of the closure of the closure of the river, on February 8 the most closed to the river Tancheng River in Shandong Province Wei Zhuang workers, closure of the river 330.3 kilometers. Opening temperature slow rise, the hydraulic effect is small, melting ice Kai River long process, to March 9, the main open pass, freeze lasted for sixty-six days, ice 40 million cubic meters. It is the later year of the river.