一二维模型在湖泊水环境调度中的应用比较

Comparison of One and Two Dimensional Model in Lakes Water Environment Scheduling

以湖泊水环境调度为例,比较了一维模型、一二维耦合模型的构建方法及其在湖泊水环境调度中的应用。发现两种方法计算的调度流量、水位过程拟合程度较好;B湖引入A湖优质水资源,B湖北侧湖区Ⅲ类~Ⅳ类水体面积增加,一二维耦合模型的空间展示效果更为直观;计算全年湖泊的水量水质调度,一二维耦合模型用了34.3h,而一维模型仅用了5.8min。通过两种方法的比较分析,提出将两种方法结合使用,以A、B湖每月连通1次、每月连通2次为例,比较论证较优的调度方案,发现每月连通1次有利于改善B湖的水质。

Taking water environment scheduling of lakes as an example,construction methods and calculation results of one-dimensional model and one&two dimensional coupling model are compared.The comparison shows that both methods have good fitting degree between scheduling flow and water level process.Better water of A lake flowing into B lake,the area ofⅢ-Ⅳwater quality in north side of B lake increases.The spatial display effect of one&two dimensional coupling model is more visual.It takes 34.3 hours for one&two dimensional coupling model but 5.8 minutes for one-dimensional model to calculate annual quantity and quality regulation of lakes.Through the comparison and analysis of two methods,combination of two methods is suggested.Taking lakes A and B connected once per month and twice per month as an example,it is found that connecting once per month is beneficial to improve the water quality of lake B.