List of Articles Collar Open Access Article Abstract Page Full-Text 1 - Numerical investigation of the influence of the collar and submerged sides flush with the flow bed on the reduction of scour depth of the bridge foundation جمال عامری ابراهیم نوحانی Open Access Article Abstract Page Full-Text 2 - Control of local scour by symmetrical and asymmetrical collar around the bridge pier in river bend پریسیما عباسی علیرضا مسجدی محمد حیدرنژاد