基于MIKE11伊通河大桥防洪影响评价计算分析

Calculation Analysis of Influence and Evaluation in Flood Prevention of Yitong River Bridge Based on MIKE11

本文以拟建长伊高速公路跨伊通河大桥为例,采用MIKE11模型,计算了伊通河大桥建设前后桥位断面处河道水位的桥前壅高变化情况,分析了大桥建设对伊通河乐山段河道行洪、堤防、护岸等水利工程、防汛抢险的影响及对第三方合法水事权益的影响。分析计算结果表明:伊通河大桥建成后河道水位壅高二十年一遇洪水雍高0.03m,回水长度30m; 100年一遇洪水雍高0.05m,回水长度70m,并针对大桥建设存在的防洪不利影响,提出了相应的补救措施。结论可对伊通河大桥建设工程提供重要技术指导和理论支撑。

This article takes the Yitong River Bridge across the expressway from Changchun to Yitong as the example,uses the MIKE11 model,and calculates the change of water level before and after the construction of Yitong River.Meanwhile,this article offers some remedial measures to the adverse effects after the construction of Yitong River.