Spatial and Temporal Distribution Characteristics and Evaluation Analysis of Surface Water Quality in Qinhuangdao City

China Rural Water and Hydropower ›› 2020 ›› (6) : 63-71.

WANG Zhu1，3 ，LIU Yang1，2 ，WANG Fang1，2 ，ZHU Shi-jiang3

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In order to analyze the temporal and spatial variation characteristics of water environment quality in Qinhuangdao City, the monitoring data of COD, NH+4-N, TP and permanganate index of 17 monitoring sections in Qinhuangdao City were collected monthly in 2017. The water environment quality is evaluated by single factor evaluation and principal component analysis, and the causes of pollution are analyzed by combining the land use structure. The results show that: ①In time, TP and NH+4-N pollution is serious in spring and winter, but relatively low in summer and autumn, and the water quality in flood season is better than that in non-flood season on the whole. ②In space, 64.7% of the monitoring sections' water quality are inferior type Ⅴ. The pollution of Jian River, Yinma River and Tang River are relatively serious, and the pollution degree of downstream coastal rivers is greater than that of upstream rivers. ③The correlation between pollutant concentration and land use structure shows that human land use is the main cause of water pollution in the study area, and the increase in natural land area such as woodland and grassland is helpful to alleviating water pollution.

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surface water quality / temporal and spatial variation / correlation analysis / Qinhuangdao city

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WANG Zhu, LIU Yang, WANG Fang, ZHU Shi-jiang. Spatial and Temporal Distribution Characteristics and Evaluation Analysis of Surface Water Quality in Qinhuangdao City. China Rural Water and Hydropower. 2020, 0(6): 63-71

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Received	Revised	Published
2019-08-23	2019-10-11	2020-06-15
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2020-07-02

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