拦路港是连接苏州和上海的关键水道,也是太湖流域洪涝水东排的重要泄洪通道,河道安全运行对区域经济发展起到重要作用。本文通过分析2004~2020年的水下地形数据,研究了拦路港河势演变的特点。研究表明,拦路港河道自2004年以来整体呈现持续冲刷的趋势,尤其是上游淀峰段和下游斜塘段冲刷最为严重,河床深度显著增加。采用Mike21二维水流数学模型对河道在不同流量条件下的水流流态进行了数值模拟和分析,结果显示丰水年大潮期间的冲刷最为明显。本文识别出河道的高风险岸段并提出了科学的改造建议,包括加固堤防、拓宽河道和采用生态护岸等措施,以提高拦路港的防洪排涝能力和航运功能,保障其安全运行和区域的可持续发展,也为同类型的感潮河网地区河道的安全管理和堤防建设提供借鉴和参考。Lanlu Port is a crucial waterway connecting Suzhou and Shanghai and serves as an important flood discharge channel for the eastern drainage of the Taihu Basin. The safe operation of this river is vital for regional economic development. By analyzing underwater topography data from 2004 to 2020, this study investigates the characteristics of the river regime evolution of Lanlu Port. The study reveals that since 2004, the river has shown a continuous scouring trend, particularly severe in the upstream Dianfeng section and the downstream Xietang section, with significant increases in riverbed depth. The Mike21 two-dimensional hydrodynamic model was used to numerically simulate and analyze the flow patterns of the river under different flow conditions. The results indicate that the scouring is most pronounced during the high tide periods of wet years. This study identifies high-risk bank sections of the river and proposes scientific renovation suggestions, including strengthening embankments, widening the river, and adopting ecological bank protection measures. These recommendations aim to enhance the
