随着长江口北港河道主泓不断呈反“S”形发展,堡镇岸段原丁坝群坝头附近冲刷深度加大、坝间滩地冲刷后退,对大堤安全构成一定威胁;需采取工程措施补救,保护坝头和坝间滩地稳定。本文采用MIKE 21数学模型,模拟了北港堡镇岸段的水动力场,并比较两种坝头保护方案对水动力场的干预作用,推荐了合理的工程方案。 As the main port of Beijiang River in the Changjiang Estuary continued to develop in an inverted “S” shape, the depth of scouring near the dam head of the former Dingba Group on the bank of Beilun Port increased and the beach land at the dambed scoured and retreated, posing a threat to the safety of the dike. Engineering measures Remedy to protect the dam head and dam beach stability. In this paper, the mathematical model of MIKE 21 was used to simulate the hydrodynamic field in the shore section of Beigangbao. The intervention effects of two kinds of dam protection schemes on the hydrodynamic field were compared, and a reasonable engineering scheme was recommended.