Evaluation and Prediction of Water Quality in the Yangtze River Based on Fuzzy Comprehensive Evaluation Method

Rui, Yan; Hu, Zihan; Wu, Changwei; Cheng, Li; Fu, Rao

doi:10.28933/jper-2020-01-2005

Cited by 2 publications

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“…At present, the common methods of water environment quality evaluation mainly include single factor index method 3 , Nemerow pollution index method 4 , comprehensive pollution index method 5 , grey system evaluation method 6 , fuzzy comprehensive evaluation method 7 . The application of various water quality assessment methods in lakes and reservoirs has been relatively mature 8 .…”

Section: Introductionmentioning

confidence: 99%

Water quality assessment of Lugu Lake based on Nemerow pollution index method

Wang

et al. 2022

Sci Rep

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In this paper, three monitoring sections were set up in Lugu Lake, and water samples were collected in 2019, 2020, and 2021 for the determination of physical and chemical properties such as permanganate index, chemical oxygen demand, biochemical oxygen demand (BOD5) and so on. By using the single factor pollution index method and the Nemerow pollution index method, the water quality of three monitoring sections and the whole Lugu Lake was assessed, and the temporal and spatial changes of water quality were analyzed. The findings demonstrate that Lugu Lake's overall water quality is excellent, and that it has not altered significantly in three years.The results of evaluating the water quality by the single factor pollution index method show that, in the past three years, the water quality of the three monitoring sections and the whole of Lugu Lake is Category I, which belongs to no pollution, and the measured indicators all meet the water quality standard of Category I. It can be seen from the evaluation results of the Nemerow index method that the water quality pollution index of Lugu Lake is between 0.22 and 0.34 in the past three years and the water quality evaluation of Changdao Bay, Lake center, Zhaojia Bay and the whole are Category I standards in 2019, 2020 and 2021. In terms of time changes, the water quality of Lugu Lake has remained stable between 2019 and 2021, and the water quality has been good. From the perspective of spatial changes, in 2019 and 2020, the water quality in Lake center is better than the monitoring sections of Changdao Bay and Zhaojia Bay.

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Section: Introductionmentioning

confidence: 99%

Water quality assessment of Lugu Lake based on Nemerow pollution index method

Wang

et al. 2022

Sci Rep

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“…At present, the common methods used for water environment quality evaluation mainly include single factor evaluation method [ 3 ], comprehensive pollution index method [ 4 ], fuzzy comprehensive evaluation method [ 5 ], Nemerow pollution index method [ 6 ] and water quality index method [ 7 ]. The application of various water quality assessment methods in lakes and reservoirs has been relatively mature [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Water quality assessment based on Nemerow pollution index method: A case study of Heilongtan reservoir in central Sichuan province, China

Wang

et al. 2022

PLoS ONE

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In this paper, three monitoring sections were set up in Heilongtan Reservoir, and water samples were collected in 2019, 2020, and 2021 for the determination of physical and chemical properties such as permanganate index, chemical oxygen demand, and biochemical oxygen demand (BOD5). The water quality was evaluated by the single factor pollution index method and the Nemerow pollution index method, and the temporal and spatial changes of water quality were analyzed.The single factor pollution index method determines the water quality category by identifying the single worst indicator of water quality, based on the classified water quality category. The Nemerow pollution index method emphasizes the most polluting factor while also taking into account the contribution of other factors in the assessment system, and determines the water quality category through the comprehensive pollution index. The results of the study indicate that the monitoring indicators of the monitoring sections have reached the Category III water quality standard and above in the "Surface Water Environmental Quality Standard" during the three years 2019 to 2021. The Heilongtan Reservoir’s water quality in 2019, 2020, and 2021 is of Category I standard, according to the results of the evaluation of water quality using the single factor pollution index technique. According to the Nemerow pollution index method’s results for evaluating water quality, the water quality pollution index for the three monitoring sections as a whole ranges from 0.36 to 0.51 in three years. The three monitoring sections’ water quality—Dongfeng Canal, Longmiao, and Sixin Village—has not changed significantly during that time, remaining clean. In terms of temporal and spatial rates of change, the temporal rate of change (T) and spatial rate of change (S) over the three years were less than 20%, and the changes in water quality at each monitoring site were not significant.

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Evaluation and Prediction of Water Quality in the Yangtze River Based on Fuzzy Comprehensive Evaluation Method

Cited by 2 publications

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Water quality assessment of Lugu Lake based on Nemerow pollution index method

Water quality assessment of Lugu Lake based on Nemerow pollution index method

Water quality assessment based on Nemerow pollution index method: A case study of Heilongtan reservoir in central Sichuan province, China

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