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黄河是一条复杂难治的河流,黄河下游河道高悬于黄淮海平原之上,目前新乡市、开封市、济南市地面分别低于相应河段滩面20m、13m 和5m,洪水威胁仍然是中华民族的心腹之患。黄河防洪存在的突出问题是:1.河床淤积抬高,防洪能力降低。根据对黄河下游现状大堤的防御能力分析,防御设防标准内的洪水仍有630km 大堤高度不够,其中240多 km 大堤超高低于设计值0.5m 以上,最大的低1.7m;有686km 大堤断
The Yellow River is a complex and refractory rivers, the lower reaches of the Yellow River suspended above the Huang-Huai-Hai Plain, Xinxiang City, Kaifeng City, Jinan City, the current floor were lower than the corresponding river beach 20m, 13m and 5m, the threat of floods is still China The suffering of the nation’s henchmen. The outstanding problems existing in flood control of the Yellow River are as follows: 1. Sedimentation in the riverbed is increased and flood control ability is reduced. According to the analysis of the defense capability of the existing embankment in the lower reaches of the Yellow River, there is still not enough height for the 630km embankment in the defensive fortification standards. Over 240km embankment is above 0.5m in design height and the maximum is 1.7m lower; 686km embankment is broken