Research on Fuzzy Comprehensive Evaluation of Surface Water Quality in Xiquan Lake Wetland

2013 ◽  
Vol 726-731 ◽  
pp. 1174-1177 ◽  
Author(s):  
Wei Chun Gao ◽  
Jun Pan ◽  
Fei Ding ◽  
Yi Cheng Gong ◽  
Yong Xiang Zhang
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Pollution Index ◽  
Surface Water Quality ◽  
Fuzzy Comprehensive Evaluation ◽  
Dry Season ◽  
Rain Season

Using Xiquan Lake wetland as an example, the fuzzy comprehensive evaluation method in the application of surface water quality assessment was discussed in this paper. This paper chooses six representative pollution index, calculates respectively weight and integrated membership grade of the pollution index during dry season and rain season, and overall evaluates surface water quality of Xiquan Lake wetland comprehensive. Fuzzy comprehensive evaluation results show that water quality is respectively class V and III during dry season and rain season. Surface water quality of Xiquan Lake wetland in rain season is worse than in dry season. The evaluation results are scientific and reasonable, provide effective basis for wetland resources use and management.

The Evaluation of the Water Quality of Shenwo Reservoir Based on Fuzzy Comprehensive Evaluation Method

2012 ◽  
Vol 594-597 ◽  
pp. 2061-2065
Author(s):  
Dan Liu ◽  
Na Hu ◽  
Han Yong Liu ◽  
An Gong
Keyword(s):  
Water Quality ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Quality Data ◽  
River Section ◽  
Water Quality Data ◽  
Fuzzy Comprehensive Evaluation Method ◽  
Comprehensive Evaluation Method

The water of Shenwo reservoir has been seriously polluted. In order to avoid the inaccurate evaluation results of a single index, the variable fuzzy comprehensive evaluation method has been adopted to comprehensively evaluate the water quality of Shenwo reservoir based on the water quality data of Lan River section of Shenwo reservoir in 2011. The evaluation results have shown that the water quality of Shenwo reservoir belongs to grade Ⅳ, which tends to be grade Ⅲ. The evaluation results based on this approach will be more stable and reliable.

scholarly journals Heavy Metals Assessment of Abattoir Effluent on Surface Water Quality of River Katsina-Ala of Benue State, Nigeria

2015 ◽  
Vol 49 ◽  
pp. 90-98 ◽  
Author(s):  
Addy Jose Vershima ◽  
Kabough Jonathan Terkimbi ◽  
Azua Terese ◽  
Aliyu Ibrahim
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Heavy Metal ◽  
Surface Water ◽  
Rainy Season ◽  
Metal Content ◽  
Surface Water Quality ◽  
Dry Season ◽  
Heavy Metal Content

Water samples of six sampling sites (two downstream, two abattoir sites and two upstream sites) were analyzed using standard methods to determined and assessed heavy metal content of abattoir effluent on surface water quality of River Katsina-Ala, Benue State, Nigeria for rainy and dry seasons. Rainy season heavy metals results were; Cr6+ (0.032+0.06mg/l); Mn2+ (0.16+0.034mg/l); Cu2+ (0.86 +0.46mg/l); Pb2+(0.006+0.002mg/;Cd2+(0.0023+0.004mg/l) and the dry season results were: Cr6+(0.028+0.007mg/l); Mn2+(0.07+0.05mg/l); Cu2+(0.85+0.16mg/l); Pb2+(0.0030+0.014mg/l); Cd2+(0.0021+0.012mg/). Most heavy metals for both seasons were within the maximum permissible limit set by Federal Ministry of Environment, Nigeria (1991). The mean concentrations of Zn2+(1.70+0.29 mg/l) for rainy season and Zn2+(1.33+0.23mg/l) dry season were above the control and standard safe limits of < 1mg/l FMEnv (1991) for surface water quality. There was no significance difference (p<0.05) between the means from upstream and downstream sites for both seasons; though significance difference (p<0.05) existed at the abattoir sites. River Katsina –ala is slightly polluted. Heavy metal content from effluents from abattoir contributed to upset the physicochemical balance of the river. Bioaccumulation and bio-magnification of heavy metals may occur from prolong usage of the river water for drinking. It is suggested that the abattoir effluent be treated before discharge into the river to reduce environmental and health hazards.

Research on a Multi-Index Comprehensive Evaluation Method for Surface Water Quality Assessment

2014 ◽  
Vol 1010-1012 ◽  
pp. 321-324 ◽  
Author(s):  
Xian Lin Meng ◽  
Guang Liang Fan ◽  
Xiao Hui Cao ◽  
Jun Guo He ◽  
Jian Hua Qu
Keyword(s):  
Water Quality ◽  
Principal Component Analysis ◽  
Surface Water ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Correlation Method ◽  
Surface Water Quality ◽  
Principal Component ◽  
Comprehensive Evaluation Method ◽  
Grey Correlation

The evaluation of surface water quality is a problem which relates to whether the environmental function and value do possess or not in the water. A new comprehensive evaluation method which combines Principal Component Analysis (PCA) and the weighted grey correlation method was presented in this paper. The reduction of indicators and the weakening of the multiple correlation among indicators were considered in Principal Component Analysis. According to different functional areas categories of every section, the weighted grey correlation method could determine the evaluation indicator’s weights, strengthen the effect of concerntrations of indicators and consider each indicator’s impact. The Mudanjiang River downstream sections were used as the research object. Based on the water quality monitoring data of typical monitoring section in 2013, the study on the environmental quality assessment of downstream section in mudanjiang was given in this paper. The efficiency of the evaluation process and the accuracy of the results can be improved.

scholarly journals Evaluation of Aquaculture Water Quality Based on Improved Fuzzy Comprehensive Evaluation Method

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1019
Author(s):  
Guodong You ◽  
Bin Xu ◽  
Honglin Su ◽  
Shang Zhang ◽  
Jinming Pan ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Evaluation ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Water Quality Evaluation ◽  
Fuzzy Comprehensive Evaluation Method ◽  
Comprehensive Evaluation Method ◽  
Aquaculture Water

The quality of aquaculture waters is directly related to water management and aquaculture efficiency, which puts forward higher requirements for water quality evaluation. Based on the consideration of the influence of temporal and spatial changes on the water quality, this paper proposed an improved fuzzy comprehensive evaluation method for aquaculture water quality evaluation. Specifically, constructing a new membership function in the first place, and then selecting dissolved oxygen, pH, temperature and ammonia nitrogen content as water quality indexes for aquaculture, after that, collecting 60 sets of water quality index for different seasons in the past three years, finally, evaluating the water quality of Yangjiabo Aquaculture Base. Meanwhile, comparing it with the evaluation results of the single factor evaluation method and the traditional fuzzy evaluation method. The results show that the water quality of the Yangjiabo Aquaculture Base is at the worst level in winter, and the water quality has improved significantly in spring, summer and autumn. Compared with the other two method, the improved method can comprehensively reflect the changes in water quality with time and space, which is more practical, and so it can be considered to provide a scientific basis for efficient aquaculture and water quality classification.

Comprehensive Evaluation Method of Surface Water Quality in Arid Region

2011 ◽  
Vol 403-408 ◽  
pp. 1517-1520
Author(s):  
Shang Yang Yang ◽  
Long Yun Zhang ◽  
Yue Gao
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Arid Region ◽  
Quality Evaluation ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Surface Water Quality ◽  
Water Quality Evaluation ◽  
Comprehensive Evaluation Method ◽  
Local Water

With the building of the South-to-North Water Diversion Project, surface water resources in arid regions has been recharged effectively. Generally speaking, the surface water-supply resources in arid region include two parts, local water and secondary water, which makes its water quality evaluation has its own particularity and different from regular evaluation. So the surface water quality evaluation in arid region is unique.For it involves a wide range of complex factors in practice, the fuzzy set theory and fuzzy matter-element theory were applied to the study. The mathematical model was established based on the quantity demand of both local water and secondary water, and meanwhile taking the subjective and objective conditions into account carefully, so the weights of the two parts were obtained respectively. The results proved to be a good solution to solve the problem of water quality evaluation level in arid areas,and the research achievements also openup new ideas for comprehensive evaluation method of surface water quality in cities of arid region.

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