通过对近期黄河下游山东河段来水来沙特点的分析,指出了自1986～1996年以来的枯水少沙系列,使下游河道的水沙条件发生了根本变化,年水量大幅度减少,年径流量减少了1/2,水量年内分配发生变化。河道淤积持续发展,对下游的防洪保安构成了新的威胁。 Based on the analysis of the incoming and outgoing water from the Shandong reach in the lower reaches of the Yellow River recently, the series of low water and sediment from 1986 to 1996 have been pointed out. The water and sediment conditions of the lower reaches have undergone fundamental changes. Reduced runoff by a factor of two and distribution of water changes during the year. The siltation of the river continued to develop, posing a new threat to downstream flood control and security.