圩垸内部排水沟网与二级泵站优化组合的计算机模拟模型

平原圩区排水干河以下存在众多圩垸，其中大量低洼圩垸内部涝水不能自排入干河，需靠二级泵站抽排。文章针对这类圩区特点，建立了包括排水沟网布置、沟道断面尺寸、湖泊和二级泵站规模的数学模拟模型，并提出了模型试验和多目标决策的方案优选方法。实例研究表明，模型仿真性能好，具有可操作性。

A Computer Simulation Model for Optimal Combination of Drainage Ditch Network and Second-Stage Pumping Stations in Polder Area

There are many polder areas existed under the main drains in the plain POlder region. The waterlogging in these low polder areas can not be drained out to main drains by gravity in most cases and should be pumped out by second-stage pumping stations. A methematical model for determining the drainage ditch network layout, ditchs cross section, lake and second-stage pumping stations scale is presented in this paper based on the proprties of the polder areas. The optimal method for alternatives selecting of model testing and multi-objective decision making are also developed. The case study results have shown that the model has good simulation performance and feasibility.