Spatio-Temporal Variation of Water Quality in Lixia River Watershed Associated with the Operation of a Water Diversion Project

IF 0.9 4区 环境科学与生态学 Q4 WATER RESOURCES Water Resources Pub Date : 2024-04-05 DOI:10.1134/s0097807823600572
Chenjuan Jiang, Liang Luo, Jia’nan Zhou, Guosheng Fu, Xiaoli Chen
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Abstract

Based on multi-variable water quality data, spatio-temporal variations of water quality can be explored to provide a scientific basis for sustainable water quality management. Lixia River Watershed, a relatively closed low-lying polder area in the lower reaches of Huai River basin, China, is closely related to the Yangtze River system. The spatio-temporal variations of water quality of Taizhou, a subsection of the Lixia River Watershed, were assessed based on the monthly water quality data of 39 sampling sites in 2017, by combining methods of Water Quality Index of the Canadian Council of Ministers of the Environment (CCME WQI), cluster analysis (CA), discriminant analysis (DA) and principal component analysis (PCA). The results show that CCME WQI ranged from 70.17 to 95.35, and the water quality of sampling sites could be grouped into 3 categories, where the southwestern parts of both Hailing and Jiangyan were excellent, the south and northeast of Xinghua were good, the southeast of Jiangyan and the northwest of Xinghua were fair. The 12 months of 2017 were grouped into two clusters, water quality in time period 1 (January to March, July to October) was poor, while that in time period 2 (April to June, November to December) was good. Sampling sites were grouped into two clusters: spatial group A (southwest of both Jiangyan and Hailing, south of Xinghua) and spatial group B (southeast of Jiangyan, north of Xinghua), and spatial group B was seriously polluted. NH3-N, total phosphorus (TP) and five-day biochemical oxygen demand (BOD5) were the major variables responsible for water quality variation, while permanganate index (CODMn), chemical oxygen demand (CODcr) and dissolved oxygen (DO) were the secondary parameters.

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与引水工程运行有关的里下河流域水质时空变化
摘要基于多变量水质数据,探索水质的时空变化,为可持续水质管理提供科学依据。里下河流域是中国淮河流域下游一个相对封闭的低洼圩区,与长江水系密切相关。根据2017年39个采样点的月度水质数据,结合加拿大环境部长理事会水质指数(CCME WQI)、聚类分析(CA)、判别分析(DA)和主成分分析(PCA)等方法,评估了里下河流域泰州分区水质的时空变化。结果表明,CCME WQI 在 70.17 至 95.35 之间,采样点水质可分为 3 类,其中海陵和姜堰的西南部均为优,兴化南部和东北部为良,姜堰东南部和兴化西北部为一般。2017 年 12 个月分为两组,第 1 时段(1 月至 3 月、7 月至 10 月)水质为劣,第 2 时段(4 月至 6 月、11 月至 12 月)水质为良。采样点分为两个组群:空间组 A(姜堰和海陵西南部,兴化南部)和空间组 B(姜堰东南部,兴化北部),空间组 B 污染严重。NH3-N、总磷(TP)和五日生化需氧量(BOD5)是造成水质变化的主要变量,而高锰酸盐指数(CODMn)、化学需氧量(CODcr)和溶解氧(DO)则是次要参数。
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来源期刊
Water Resources
Water Resources 环境科学-水资源
CiteScore
1.60
自引率
20.00%
发文量
86
审稿时长
6-12 weeks
期刊介绍: Water Resources is a journal that publishes articles on the assessment of water resources, integrated water resource use, water quality, and environmental protection. The journal covers many areas of research, including prediction of variations in continental water resources and regime; hydrophysical, hydrodynamic, hydrochemical and hydrobiological processes, environmental aspects of water quality and protection; economic, social, and legal aspects of water-resource development; and experimental methods of studies.
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