污染物扩散对恒河上游水质影响的数值模拟(印度鲁尔基市)

IF 3 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
T. A. Bahita, S. Swain, P. K. Jha, S. S. Palmate, A. Pandey
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引用次数: 0

摘要

在水质文献中,现场数据收集和实验调查是普遍的;然而,文献中很少有关于水体中水流的数值模拟。污染物的扩散对水质的影响必须深入研究。本文建立了一个三维数值模型,分析了恒河上游(UGC)从老运河大桥到鲁尔基(Roorkee)甘尼什普尔(Ganeshpur)大桥的水流和污染物扩散。该模型模拟了五个排污口的污染物流入,并研究了不同的污水流速(0.2 m/s、0.4 m/s和0.6 m/s)对污染物浓度的影响。结果表明,运河两岸附近的污染物浓度最大,运河中心的污染物浓度最小。该研究还跟踪了固体颗粒的运动,发现大于80µm的颗粒沉降很快,100%的颗粒沉降在底部,而较小的颗粒(< 25µm)悬浮的时间更长,只有30%沉降。研究结果表明,污水污染物主要影响运河两岸附近的水浓度,并与污水入口的数量和流速成正比。该模型提供了对运河系统中污染物扩散的关键见解,对改善水质管理策略至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Numerical modelling of pollutant dispersion affecting water quality of Upper Ganga Canal (Roorkee City, India)

Numerical modelling of pollutant dispersion affecting water quality of Upper Ganga Canal (Roorkee City, India)

In water quality literature, in-situ data collections and their experimental investigations are prevalent; however, numerical modelling of flow of water in waterbodies are rare in literature. The pollutant dispersion affecting water quality must be explored. In the study, a three-dimensional numerical model was developed to analyze water flow and pollutant dispersion in the Upper Ganga Canal (UGC) from the old canal bridge to the Ganeshpur bridge in Roorkee. The model simulated pollutant inflow from five sewage outlets and examined the impact of varying sewage velocities (0.2 m/s, 0.4 m/s, and 0.6 m/s) on pollutant concentrations. Results showed that pollutant concentration is maximum near the canal banks and minimum at the centre of the canal. The study also tracked the movement of solid particles, revealing that particles larger than 80 µm settled quickly, with 100% of particles settling at the base, whereas smaller particles (< 25 µm) remained suspended longer, with only 30% settling. The findings indicate that sewage pollutants predominantly affect water concentration near the canal banks and are proportional to the number of sewage inlets and their velocities. This model provides critical insights into the dispersion of pollutants in canal systems, essential for improving water quality management strategies.

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来源期刊
CiteScore
5.60
自引率
6.50%
发文量
806
审稿时长
10.8 months
期刊介绍: International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.
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