【作者】 张贺新；

【导师】 伍悦滨；

【作者基本信息】 哈尔滨工业大学 ， 水力学及河流动力学， 2009， 硕士

【摘要】 对水环境质量进行科学的分析评价和预测进而对其进行有效的规划治理和管理,对保证社会经济的可持续发展具有十分重要的意义。应用水动力学和水质模型,对水体的水动力学规律和水质情况进行分析预测,是水环境分析和预测的重要基础。本论文研究目的是:应用三维水动力学和水质模型,对磨盘山水库水动力学规律和水质情况进行模拟研究,并根据模拟结果对磨盘山水库水动力学规律和水质情况进行评价分析。本文首先阐述了水环境数值模拟的国内外研究现状,简述了磨盘山水库的水文、水文地质以及环境污染方面的概况。介绍了由美国国家环保署资助开发的EFDC(Environmental Fluid Dynamics Code)三维水动力学—水质模拟软件,对其组成结构及基本理论进行分析与阐述,建立了磨盘山水库三维水动力学—水质模型。流场的模拟结果显示,磨盘山水库流场受风应力影响较大,表层以下水体流态复杂。文章分析了流场对水质的影响。温度场的模拟结果显示,磨盘山水库水温在全年都处于分层状态,4月垂向温差较小,6、7月份分层最明显,至9、10月份出现秋季翻滚,垂向掺混加强。根据各时期水温分布,本文分析了水库的温度分层对水库水质的影响以及对农业灌溉的影响。并结合实际情况,给出了导流洞的最佳位置。本文选取常用的水质参数溶解氧DO,化学需氧量COD,和氨氮NH3-N作为水库水质的研究对象。水质模拟结果显示,溶解氧DO全年处于分层状态。根据溶解氧DO的分层规律,文章给出了水库取水口的最佳位置;磨盘山水库整体水质情况良好。文章最后对水质参数COD进行了敏感性分析。更多还原

【Abstract】 In order to keep the social economy to develop sustainably, it is very important that the water environment quality is analyzed, evaluated and predicted rationally, and it is therefore planned, harnessed and managed efficiently. To conduct the water environment analysis and prediction, an important basic work is to analyze and predict the hydrodynamic behaviors and water situations of the water body with hydrodynamic behaviors and water pollution situations of the water body with hydrodynamics and water models. The objective of this research is to study the hydrodynamic behavior and water quality in Mopanshan reservoirs with 3D hydrodynamics and water quality models, and lastly hydrodynamic behavior and water quality was evaluated and analyzed based on the simulation results.The current research domestic and abroad about water environment numerical simulation is elaborated firstly. Hydrology, hydrogeology and environmental pollution of Mopanshan reservoir is described orderly. A 3D hydrodynamic-water quality model is set up after introducing the basic structure and theory of EFDC(Environmental Fluid Dynamics Code). EFDC is supported by U.S.EPA. The simulation results of the flow field shows that, the flow field in Mopanshan reservoirs is significantly influenced by wind stress. Water flow below the surface is complicated. The article analyses the influence of flow field on water quality.The hydrodynamic results show that the thermal stratification exists during the period of whole year .The vertical water temperature difference is lower in April , is the largest in June and July. In September and October, the cold water on surface settles down and strengthens the vertical mixture. Based on the water temperature stratification in different periods, the influence of water temperature over water quality and agriculture irrigation is analyzed. Combined with the actual situation, the optimal location of the diversion tunnel is presented.This article selects the common quality parameters, like COD, DO and NH3-N as the research objects. The water quality results show that the water quality constituents are also stratified during the time of whole year. Based on the distribution of dissolved oxygen, the paper gives the best position for the reservoir intake. Water in Mopanshan reservoir is in good condition. Finally, the sensitivity analysis of COD is done.更多还原