摘要
南美洲厄瓜多尔境内的Guayas河流域中下游社会经济发达,但洪水问题突出,是该国流域综合规划的防洪重点地区。通过综合规划论证,拟兴建由堤防、水库、蓄滞洪区、分洪道和挡潮闸组成的防洪工程体系。基于MIKE11软件平台构建了Guayas河流域中下游河网洪水一维数值模型,对平原感潮河网的洪水演进规律和规划的防洪工程体系联合运用进行了模拟计算。在模拟中,通过合理概化河网、优化河道断面布置,以及采用堰闸过流公式代替圣维南方程作为堰闸工程所在断面的水流运动方程,有效避免数值振荡问题。在模拟结果的基础上拟定了洪水安排方案和防洪工程规模。
The middle and lower reaches of the Guayas River basin in Ecuador are well developed in social and economy, at the meantime the flood problem is serious, so it is the key area of flood control in the river basins in Ecuador. Through analysis, it is planned to build a comprehensive flood control system composed of dikes, reservoirs, flood detention areas, flood diversion channels and tide gates. Based on the MIKEll software platform, the 1 - D numerical model of river net in the middle and lower reaches of the Guayas river basin is constructed. The flood movement law in the plain tidal area and the joint operation of the planned flood control engineering system are simulated. In the simulation, several measures are adopted to avoid numerical oscil- lation, such as rational generalization of river net, optimal arrangement of channel sections, and for the sluice sections the Saint -Venant equation is substituted by flow passing formula as the flow movement equation. Based on the simulation results, the flood arrangement solution and planned project scale are determined.
出处
《人民长江》
北大核心
2017年第22期84-88,共5页
Yangtze River
