1 前言国家有关部门颁布涉及河道管理范围内建设项目管理的有关法规等,对加强河道管理起到了重要的作用。随着我国交通事业的发展,涉及河道管理范围内的桥梁项目越来越多,但桥梁对河道防洪影响的计算方法不完善,计算结果也不一致,本文根据桥下水流实际流态的不同,用多种方法进行了唐河大桥对桥址上游河道壅水影响的计算,对计算结果进行了简单分 1 Introduction Relevant laws and regulations promulgated by relevant state departments concerning the management of construction projects within the scope of river management play an important role in strengthening river management. With the development of transportation in our country, there are more and more bridges involved in the management of river channels. However, the calculation methods of the bridge’s impact on river flood control are not perfect, and the calculated results are not consistent. Based on the actual flow regime of the bridge, A variety of methods for the Tanghe River Bridge on the upper reaches of the river sluice water calculation, the calculation results were simple points