太湖上游示范城区水环境调研及水流结构数值模拟研究
发布时间：2019-05-29 16:00
【摘要】：研究区域地处太湖西岸,是太湖流域上游的主要汇水区,近年来,随着市内工业化和城市化的发展,工业污水和城市生活污水排放日趋增加,这些污水通过市内主要河网流入太湖,从而导致了太湖水污染问题的加剧。本文以入太湖河流水质提升为目标,从现场调研和数值模拟两个方面分析市区水体水质污染现状和污染物迁移规律,研究研究区域水体流动特性。首先,在2013年10月与2015年4月对整个太湖流域进行了水质现状调查,以上游溧阳入境河段为起点,入太湖河段为终点,沿湖水域设置29个监测点,测定高锰酸钾指数、总磷、总氮、氨氮4项水质指标浓度,实验结果表明:不同采样点间高锰酸钾指数含量差距较小,其余指标变化幅度较大,其中,高锰酸钾指数为4.96~6.08mg/L,总磷值为0.11~0.32mg/L,氨氮值为0.57~1.84mg/L,总氮值为2.21~4.45mg/L。根据地表水环境质量评价标准,29个测点高锰酸钾指数达到III类水标准,总磷值含量基本介于IV类、V类之间,氨氮值含量介于IV类、V类之间,部分测点达到劣V类,总氮值含量超出V类水标准,污染比较严重。此次测定指标浓度中,城区处测点总磷值最高,入境段测点氨氮值、总磷值最高。其次,应用现有水环境模拟软件MIKE3建立西l?l?流域垂向积分二维水动力数值模型,模拟研究西l?流域夏季环流的形态特点和形成原因。计算结果显示:风是形成夏季环流的主要因素;在均匀定常风以及地形效应的共同作用下,使得西l?流场具有浅水顺风,深水逆风的分布特点;即使是在平底地形下,只要风驱动力足够大,在科氏力作用下也会有环流形成。
[Abstract]:The study area is located on the west bank of Taihu Lake and is the main catchment area in the upper reaches of Taihu Lake Basin. In recent years, with the development of industrialization and urbanization in the city, the discharge of industrial sewage and urban domestic sewage is increasing day by day. These sewage flow into Taihu Lake through the main river network in the city, which leads to the aggravation of water pollution problem in Taihu Lake. In this paper, the water quality improvement of Taihu Lake is taken as the goal, the present situation of water quality pollution and the law of pollutant transport in urban area are analyzed from two aspects of field investigation and numerical simulation, and the regional water flow characteristics are studied. First of all, the present situation of water quality in the whole Taihu Lake Basin was investigated in October 2013 and April 2015. taking the upper Liyang reach as the starting point and the Taihu Lake reach as the end point, 29 monitoring points were set up along the lake waters to determine the potassium permanganate index and total phosphorus. The experimental results show that the difference of potassium permanganate index content among different sampling points is small, and the change range of other indexes is large, among which the potassium permanganate index is 4.96 脳 6.08 mg 路L, and the potassium permanganate index is 4.96 脳 6.08 mg 路L ~ (- 1), and the potassium permanganate index is 4.96 脳 6.08 mg 路L ~ (- 1). The total phosphorus value was 0.11 鈮，
本文编号：2488042
[Abstract]:The study area is located on the west bank of Taihu Lake and is the main catchment area in the upper reaches of Taihu Lake Basin. In recent years, with the development of industrialization and urbanization in the city, the discharge of industrial sewage and urban domestic sewage is increasing day by day. These sewage flow into Taihu Lake through the main river network in the city, which leads to the aggravation of water pollution problem in Taihu Lake. In this paper, the water quality improvement of Taihu Lake is taken as the goal, the present situation of water quality pollution and the law of pollutant transport in urban area are analyzed from two aspects of field investigation and numerical simulation, and the regional water flow characteristics are studied. First of all, the present situation of water quality in the whole Taihu Lake Basin was investigated in October 2013 and April 2015. taking the upper Liyang reach as the starting point and the Taihu Lake reach as the end point, 29 monitoring points were set up along the lake waters to determine the potassium permanganate index and total phosphorus. The experimental results show that the difference of potassium permanganate index content among different sampling points is small, and the change range of other indexes is large, among which the potassium permanganate index is 4.96 脳 6.08 mg 路L, and the potassium permanganate index is 4.96 脳 6.08 mg 路L ~ (- 1), and the potassium permanganate index is 4.96 脳 6.08 mg 路L ~ (- 1). The total phosphorus value was 0.11 鈮，
本文编号：2488042
本文链接：https://www.wllwen.com/kejilunwen/huanjinggongchenglunwen/2488042.html
