According to the result of physical modeling , the regression equation about the decrement of tidal bore height , the percentage of water - resisting area and the distance away from the upstream bridge site is constructed in this paper , the regression equation can be applied in the impact which bridge has on the tidal bore height in qiangtang esturary 根据模型试验结果，建立了涌潮高度的减小值与中潮位桥墩阻水面积百分比和上游离桥址距离的多元回归方程，可供钱塘江河口建桥对涌潮高度的影响计算参考使用。
It is local impact that bridge being built has on the shape of tidal bore , and this local impact can be recovered in the place which is 300 - 500 long upstream bridge . the impact that bridge being built has on the intensity of tidal bore depends on the water - resisting area of bridge . generally the more water - resisting area is and the nearer the place is away from the bridge site , the more impact is on the intensity of tidal bore 建桥对涌潮形态的影响是局部的，在桥上游300m 500m的范围内基本可以得到恢复；建桥对涌潮强度的影响主要取决于桥墩阻水面积，一般来讲，阻水面积越大，位置离桥址越近，对涌潮强度的影响亦越大。
Beginning with the cause of tidal bore , then making use of measure data and combining with scale physical modeling , this paper does the research about the impact that bridge engineering has on the qiantang bore , such as hangzhou bay bridge , guzhu bridge , xiaoshan bridge etc . it provides the scientific evidence for approving those engineering above 本文从涌潮的成因入手，利用实测资料分析与比尺模型试验的研究方法，全面地研究了杭州湾大桥、沽渚大桥、萧山通道等桥梁工程对钱塘江涌潮的影响程度，从而为工程建设提供科学的依据。
Generally , tidal bore is wave alignment moving upstream estuary , and its surface will break when the wave alignment is strong , which leads to water roll tracing the source . the velocity , which is between small - disturbed wave velocities before tidal bore happens and the one after tidal bore happens , increases with the ratio of tidal bore height to the water depth in wave front 涌潮一般是向河口上游推进的波列，强度大时，表面破碎，进而发展成溯源推进的水滚，其传播速度随涌潮高度与波前水深比值增加，大小介于涌潮前后小扰动波波速之间。
