黄河在郑州以下是一个隆突的三角洲地貌，左右岸没有外来水汇入，只有二十几条流派辐射出海，左派的干流入卫河，经运河、海河往天津；右派的干流入贾鲁河、颍河入淮。在这种地貌上水沙流只会步步淤积；修了两堤使淤积集中在河槽里，使河床抬高更快。可以证明，任何治河方法， The Yellow River in Zhengzhou is the following of a protuberance Delta landscape, there is no external water on the left and right banks, only twenty schools radiating to the sea, the left of the mainstream into the Wei River, the canal, the Haihe River to Tianjin; the right of the mainstream into the Jialu River, Ying River into Huai. In this landscape water and sediment flow will only step by step siltation; repair two embankments so siltation concentrated in the riverbed, the river bed elevation faster. It can be proved that any method of governing the river,