Assessing the Water Quality of Shahu Lake by the Water Quality Index Model

China Rural Water and Hydropower ›› 2021 ›› (1) : 54-60.

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The study aims to characterize the relation of various water quality indexes and assess Shahu Lake water quality. Water Quality Identification Index(WQII), Canadian Council of Ministers of the Environment Water Quality Index（CCMEWQI）, Universal Water Quality Index(UWQI) used for assessing Shahu Lake water quality status in April, July and October from 2010 to 2017 are discussed. The results show that the Water Quality Identification Index of Shahu Lake ranges from 3.1 to 4.7, CCMEWQI fluctuates from 27.44 to 72.07, and the general water quality index fluctuates from 31.53 to 51.74. Water quality state is generally in marginal or poor grade, and the comprehensive water quality is in a deteriorating trend, and it is urgent to improve water quality. CCMEWQI and UWQI are significantly correlated with the Water Quality Identification Index. The optimal model of regression analysis between CCMEWQI and WQII are obtained under the composite and growth model(R2=0.614), and the optimal model of UWQI and WQII are obtained under the quadratic model(R2=0.970).

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Shahu Lake / water quality / water quality index / correlation analysis

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. Assessing the Water Quality of Shahu Lake by the Water Quality Index Model. China Rural Water and Hydropower. 2021, 0(1): 54-60

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Received	Revised	Published
2020-04-05	2020-05-14	2021-01-15
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2021-02-21

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