中文摘要：

根据黄河下游河道的现状，采用前期提出的黄河下游河道健康的评价指标体系，采用模糊综合评价法对黄河下游的河道健康进行评价，得出了黄河下游河道健康50多年来健康状况呈现持续恶化，21世纪初才有所好转的变化趋势。同时利用相关性分析，得出了黄河下游河道健康与水沙条件具有很强的相关性的结论，协调的水沙关系是维持黄河下游河道健康的关键所在，花园口年径流量、非汛期的来沙量以及汛期的来沙系数是影响河道健康的主要变量，且花园口年径流量是影响黄河下游河道健康的最为关键的因素，为黄河下游河道健康的维持和恢复明确了可以调控的对象。

英文摘要：

Based on the current situation of the Lower Yellow River channel, according to the proposed evaluation index system of channel health of the Lower Yellow River, this paper evaluates the Lower Yellow River＇ channel health using fuzzy comprehensive evaluation method and gets the conclusion that the channel health continuously deteriorated in 50 years and slightly restored at the beginning of this century. By correlation analysis, such a conclusion can be drawn that the channel health of the Lower Yellow River is closely connected with the water and sediment conditions. So, coordination of flow and sediment relationship is the key to maintaining the channel health of the Lower Yellow River. The paper concluded that the main factors affecting channel health of the Lower Yellow River is annual runoff,non-flood sediment and flood sediment coefficient of Huayuankou section. Among them, the annual runoff of Huayuankou section is the most critical factor of the channel health in Lower Yellow River, which provides the object for maintaining and restoring channel health.