南淝河主要水体污染物时空分布特征—与污染源解析

发布时间：2018-02-03 02:56

本文关键词： 主要水体污染物时空分布特征污染源解析　出处：《合肥工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：巢湖外源污染的输入,尤其是入湖河流南淝河的污染输入是巢湖污染的主要来源,根据“治湖先治河”的策略,对巢湖流域入湖河流南淝河污染以及治理的研究迫在眉睫。本文全面调查了南淝河流域污染物的排放及入湖量,分析了污染源结构,以COD、氨氮、总氮和总磷污染物在南淝河水体中的含量和时空分布特征为主线,运用内梅罗指数法对南淝河水质进行综合评价,在南淝河分区的基础上利用多元统计原理对水体进行污染源解析。得到以下几个结果:(1)污染物调查分析结果表明:南淝河流域COD、氨氮、总氮及总磷污染比较严重,同时,内梅罗评价法评价结果也表明,南淝河流域水环境质量主要集中在V及劣V类水。(2)其污染物的时空分析结果表明,从时间上来看,符合枯水期平水期丰水期这一趋势;整体上,南淝河受城市污染影响的特征表现明显。南淝河干流的各水质指标呈现出先增加后减少的变化趋势,结合污染源调查分析和南淝河水体达标方案,为了有效控制南淝河干流污染,应该以控制支流板桥河、二十埠河和店埠河的氮磷输入为主。(3)在分区的基础上,通过主成份分析,根据变量的因子载荷和监测断面的因子得分,识别污染源,其中,A区83.33%污染来源于点源有机物和点源营养物质;B区70.16%来源于点源营养物质和点源有机物;C区71.63%的污染来源于农业面源的农业营养物质和生物化学影响,通过主成分多元线性回归分析,获得了每种水质指标对污染类型的贡献率,较好地估计了主要因子对水质的污染程度,可以为科学合理的河流水质管理提供技术支持。
[Abstract]:The main source of pollution in Chaohu Lake is the input of exogenous pollution, especially the pollution input from Nanfeihe River into the lake. According to the strategy of "harnessing the lake first", Chaohu Lake is the main source of pollution in Chaohu Lake. It is urgent to study the pollution and control of Nanfeihe River in Chaohu Basin. In this paper, the discharge and quantity of pollutants in Nanfeihe River Basin are investigated, and the structure of pollution source is analyzed. The content and temporal and spatial distribution of total nitrogen and total phosphorus pollutants in Nanfeihe River were used as the main line. The water quality of Nanfeihe River was evaluated by Nemero index method. On the basis of the division of Nanfeihe River, the pollution sources of the water were analyzed by multivariate statistical principle. The following results were obtained: 1) the results of investigation and analysis of pollutants showed that: COD, ammonia nitrogen in Nanfeihe River basin. Total nitrogen and total phosphorus pollution is serious, meanwhile, the evaluation result of Nemero evaluation method also shows that the water environmental quality of Nanfeihe River basin is mainly concentrated in V and inferior V water. From the point of view of time, it is in line with the trend of high water period in low water period. On the whole, the characteristics of Nanfeihe River affected by urban pollution are obvious. The water quality indexes of the main stream of Nanfeihe River increased first and then decreased, combined with the investigation and analysis of pollution sources and the plan of reaching the standard of Nanfeihe River water body. In order to effectively control the pollution of the main stream of Nanfeihe River, it is necessary to control the nitrogen and phosphorus input of the tributaries, Banqiao River, 20 Port River and Dianbu River. According to the factor load of variables and the factor score of monitoring section, the pollution sources were identified. The pollution in area 83.33% was from point source organic matter and point source nutrients. Area B 70.16% was derived from point source nutrients and point source organic matter. 71.63% of the pollution in area C originated from the agricultural nutrition and biochemical effects of agricultural non-point source. The contribution rate of each water quality index to the pollution type was obtained by principal component linear regression analysis. The pollution degree of main factors to water quality is estimated well, which can provide technical support for scientific and reasonable river water quality management.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X52

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