A New Practical Method to Simulate Flood-Induced Bridge Pier Scour—A Case Study of Mingchu Bridge Piers on the Cho-Shui River

摘要: The evolution of bridge pier scour is very important for safety warning and assessment. During typhoon seasons in Taiwan, the torrential river flow often causes monitoring instruments to fail their attempt measure temporal variations depths. To better understand scouring phenomenon during a large flood event, this study proposes fast reliable method simulation. proposed consists two main components: (1) robust finite-volume hydraulic model that simulates depth velocities; (2) computation algorithms predict development general local greatest advantage it straight-forward reliable, giving managers sufficient time make an informed decision warning. Only few conditions near are necessary simulate evolution. Moreover, can be applied both simulations. demonstrate accuracy method, field data collected using “numbered-brick” were performed at Mingchu Bridge, which located along incised channel reach Cho-Shui River Taiwan. simulated water levels total depths good agreements with data. Finally, help authorities responsible making towards warning, curve (scoured bed level-discharge relationship) proposed. Based on results events, shows quickly accurately scour.