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Theproblemofpierscouringhasbeenstudiedbymanyinvestigatorsduetoitsimportanceinbridgepierfoundationdesign. Acriticalreviewoftheuptodateworkonpierscouringhasbeenpresentedhighlightingthescourmechanism, parametersaffectingscour, timedependentscour, scourestimationformulasandprotectionworks