傍河型水源地三氮迁移转化预测模型的一类参数反演方法

发布时间：2018-06-20 08:48

本文选题：傍河型 + 三氮　；参考：《吉林大学》2017年硕士论文

【摘要】：本文首先简单介绍了地下水作为水资源的重要性,对地下水国内外研究现状进行了回顾,说明了主要研究的内容.沈阳以傍河地下水作为主要供水水源,研究区内存在“三氮”污染问题.本论文在前人研究的基础上给出了傍河型水源地三氮迁移转化预测的数学模型,对目前用于求解逆问题的方法进行了概括总结,选择了用遗传算法、同伦算法计算研究区内硝酸盐氮弥散系数,并用该系数对研究区硝酸盐氮的迁移进行模拟.为建立浑河流域沈阳段水源地“三氮”迁移转化模型,预测地下水系统中“三氮”的时空分布特征提供初始参数.结果表明,用遗传算法、同伦算法求解该研究区的模型参数是可行有效的.这两种方法可以推广到其他污染物迁移模型的参数识别.
[Abstract]:In this paper, the importance of groundwater as water resources is briefly introduced, the present situation of groundwater research at home and abroad is reviewed, and the main research contents are explained. In Shenyang, the groundwater along the river is used as the main water supply source, and the pollution problem of "three nitrogen" exists in the study area. On the basis of previous studies, this paper presents a mathematical model for predicting the transport and transformation of three nitrogen in riverside water sources, summarizes the current methods used to solve inverse problems, and chooses genetic algorithm (GA). The dispersion coefficient of nitrate nitrogen in the study area was calculated by homotopy algorithm and the transport of nitrate nitrogen in the study area was simulated with the coefficient. In order to establish the model of "three nitrogen" migration and transformation in Shenyang section of the Hunhe River basin, and to predict the spatial and temporal distribution characteristics of "three nitrogen" in groundwater system, the initial parameters are provided. The results show that it is feasible and effective to solve the model parameters of the study area by genetic algorithm and homotopy algorithm. These two methods can be extended to other pollutant transport model parameter identification.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O242.1

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