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黄河是我国第二大河流,干流全长5464km,流域面积75.2万km~2,流域人口8959万人.从郑州的桃花峪至入海口为黄河下游,黄河下游流域面积2.3万km~2,河段长786km.黄河下游地势平坦,河道宽阔,纵比降小,仅万分之一点二.区内环境地质条件复杂,河情特殊,尽管下游堤防先后4次加高,但远滞后于淤
The Yellow River is the second largest river in China, with a total length of 5464km and a drainage area of 752,000km2, with a population of 89.95 million. From Taohuayu to the estuary of the Yellow River in Zhengzhou is the lower reaches of the Yellow River. The catchment area of the Lower Yellow River reaches 23,000 km ~ Section length of 786km. The lower Yellow River flat terrain, wide river, reducing the vertical ratio, only a little two points in the area of complex environmental and geological conditions, river conditions are special, although the embankment has four times higher, but lags far behind silt