Abstract: With two dimensional mathematic models, the navigation flow condition before and after the bridge construction is analyzed. The water surface profile and flow field is calculated and analyzed, which indicates that the construction of Zhouhe Bridge has small impact on the change of the water level, the discharge area and the width of the river and little impact on the main fiver flow field. The feasibility of the construction of bridge is proved.

Key words: Zhouhe Bridge , navigation flow , mathematic model , two dimensional ;

摘要： 采用平面二维水流数学模型,分析了州河大桥建桥前后的通航水流条件。通过工程修建前后水面线和流场 的计算和分析,表明州河大桥的修建对各级流量下河道的水位、过水断面面积和河宽的变化影响很小,对主河道流 场基本不会产生影响,论证了大桥修建的可行性。

关键词: 州河大桥, 通航水流, 数学模型, 平面二维