The local current disturbance after bridge being built in qiantang estuary leads to correspond changes of riverbed near bridge . but there is not any impact on astronomical tide , runoff large - scaled river shape and riverbed after bridge being built . so it does n ' t change the formation of tidal bore at all after bridge being built , but there is some impact on the shape and intensity of tidal bore because of pier resistance 在錢塘江河口建橋?qū)⒁鹁植克鞯臄_動(dòng)及近區(qū)河床的相應(yīng)變化,但不會(huì)對(duì)天文潮、徑流及大范圍河勢(shì)、河床產(chǎn)生影響,因而,建橋不會(huì)從根本上改變涌潮的產(chǎn)生,但橋墩阻力對(duì)涌潮形態(tài)和強(qiáng)度是有影響的。