黄河汛期(7～10月)来水量占全年60％,来沙量占全年85％。下游河道的冲淤变化,汛期的水沙条件是决定因素。因此,本文着重研究黄河汛期水沙量的变化。一黄河来水来沙在地区分布上,根据以往的工作,已经得出所谓“清水来源区”与“浑水来源区”的概念;在时间上的变化,年水量历年最大与最小的比值为3倍左右 The Yellow River flood season (July to October) to 60% of the annual water, sediment accounted for 85% of the year. Scouring and silting changes in the lower reaches of the river, water and sediment conditions in the flood season is the deciding factor. Therefore, this paper focuses on the changes of sediment and sediment in the flood season of the Yellow River. According to the previous work, the concept of “water source area” and “muddy water source area” of the Yellow River has come to be known. In terms of time, the annual amount of water is the largest The smallest ratio is about 3 times