基于不同生态需水计算方法的水量水质联合调度研究

Study on Joint Operation of Water Quantity and Quality Based on Different Eco-water Requirement Calculation Methods

为研究不同生态需水计算方法对水质评价的影响,采用4种计算方法确定河道生态流量,分别通过优化得到水量水质调度方案,并分析各方案中水质指标改善效果优劣。以浊漳河流域为例,采用大系统分解协调技术,通过数据传递实现模拟模型与优化模型的耦合,构建生态流量保障的水库水量水质联合调度模型。模型模拟结果表明,模型在时间上处理了年际间水量分配不均的情况,在空间上各河段水质改善效果较好,且基本满足了下游干流共同承担的水质需水和生态需水要求;经过综合评价,以频率曲线法计算河道生态保障流量更有利于浊漳河水质的改善。研究成果对于保障水生态,改善水环境有实际意义。

In order to study the impact of different ecological flow requirement calculation methods on water quality evaluation,four kinds of calculation methods were used to determine the ecological flow requirements,and the improvement effect of the water quality indicators in each scheme that was obtained through optimization model was analyzed. Taking the Zhuozhang River Basin as the research area,large system decomposition-coordination technique was adopted to establish the joint operation of water quantity and quality model based ecological flow protection,and the coupling between the simulation model and the optimization model was realized through the data transmission.The simulation results show that this model deals with the inter-annual water imbalance in time,achieves good effects in improving the water quality of each river section in space,and basically.meets the water quality and ecological flow requirements in the downstream.After the comprehensive evaluation,the river ecological security flow calculated by frequency curve is more conducive to the improvement of water quality of the Zhuozhang River.This research results have practical significance for ensuring water ecology and improving water environment.