流域污染负荷-水质响应的时空数值源解析方法研究

发布时间：2017-12-28 02:14

本文关键词：流域污染负荷-水质响应的时空数值源解析方法研究　出处：《中国环境科学》2016年12期 　论文类型：期刊论文

【摘要】：以目前广泛应用的环境流体动力学模型EFDC为平台,构建时空数值源解析方法,理论上可以得到任意时刻任意空间点位污染物的来源构成.其原理是考虑水质模型的微分方程,直接对每个污染负荷再微分,从而将原来1个微分方程变为关于每个污染源的微分方程组,然后联立以EFDC的水动力模型求解,得到每个源对每个时空点的贡献.概化的抚仙湖模型作为数值案例用以验证方法.时空数值源解析的结果与传统扰动方法的结果几乎重合,验证了时空数值源解析方法的正确性.另一方面,数值案例中存在34个独立的污染源,扰动法则需要35次模拟,而时空数值源解析方法的结果通过单次模拟就可得到,说明时空数值源解析方法具有明显的计算效率优势.而通过对结果的进一步分析可以发现,时空数值源解析方法可以提供更精确的源贡献的动态描述.
[Abstract]:In order to model the EFDC fluid dynamics environment is widely used as a platform, the construction method of analytical space-time data source, the source of theory can be obtained at arbitrary moment space point pollutants. Its principle is to consider the differential equation model of water quality, directly for each pollution load differential, which will be the original 1 differential equation into differential equations a group of each pollution source, and then to solve the simultaneous hydrodynamic model of EFDC, get the contribution of each source for each time point. The generalization of Fuxian Lake model as a numerical case to verify the method. The analytical and numerical results with the traditional source of space-time perturbation method results almost coincide, verify the correctness of the numerical method of analytical space-time source. On the other hand, there are 34 independent sources of pollution numerical cases, disturbance law needs 35 times and the method of numerical simulation, analysis of spatio-temporal sources results through a single mode It can be concluded that the time-space numerical source analysis method has obvious advantage of computing efficiency, and further analysis of the results shows that the time-space numerical source analysis method can provide more accurate dynamic description of the source contribution.
【作者单位】： Tetra
【基金】：国家“973”项目(2015CB458900) 环境保护部环境规划院水环境保护综合管理平台(2015年)建设课题
【分类号】：X52
【正文快照】： 以水质为目标的精细化管理是“十三五”及未来流域污染控制的核心,其基础是识别源与目标水体水质间的因果响应,实质是确定流域中不同的源排放量与受体的水质变量在时间和空间上的定量对应关系,也即源解析.源解析可分为实验和模型两种方法,其中尤以受体模型方法最为常用[1-2],

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