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引江济汉工程作为南水北调中线水源区最重要的补水工程之一,主要任务是改善汉江兴隆梯级以下河道的农业灌溉、城市供水、航运和生态环境用水条件,使供水区的生态环境质量状况得到合理的修复,以期实现“南北互利”。引江济汉工程的渠道规模是影响工程量、投资费用和工程效益的重要因素,科学合理确定引江济汉工程渠道规模,对实现南水北调中线受水区和水源区的经济、社会、生态环境协调发展具有重大意义。应用系统工程、渠道设计、工程经济学的理论和方法,建立了以供水量最大、生态环境需水量缺水量最小和工程规模利用率最大为目标、以水资源优化配置为基础的渠道规模多目标优选模型,首次提出了不同频率组合控制流量的多目标边际优选法,对引江济汉工程渠道规模进行了实例研究,取得了满意成果。
As one of the most important water supply projects in the water source area of the Middle Route of the South-to-North Water Diversion Project, the main task of the water diversion project is to improve agricultural irrigation, urban water supply, shipping and eco-environmental water supply conditions below Xinglong cascade in the Hanjiang River so that the eco-environmental quality of water supply areas is reasonable Repair, in order to achieve “North-South mutually beneficial ”. The scale of the channel leading to the Jijiang project is an important factor affecting the project volume, investment costs and project benefits. Scientifically and rationally determining the channel scale for the Jijiang project will have a significant impact on the coordinated development of economy, society and eco-environment in the water-intake and catchment areas of the mid-route of the South-to-North Water Diversion Project significance. Based on the theories and methods of system engineering, channel design and engineering economics, aiming at the goal of maximizing the water supply, minimizing the water deficit of the ecological environment water demand and maximizing the utilization rate of the project scale, the channel scale based on the optimized allocation of water resources Goal optimization model, the multi-objective marginal optimization method for controlling the flow rate of different frequency combinations is proposed for the first time, and the case study on the channel scale of the Jijiang River Project has been carried out and satisfactory results have been achieved.