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Hydrochemical characteristics and water quality assessment for drinking and agricultural purposes in District Jacobabad,Lower Indus Plain,Pakistan

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International Journal of Agricultural and Biological Engineering 2018年第2期11卷 115-121页

作者： Asfandyar Shahab Shihua Qi Muhammad Zaheer Audil Rashid Muhammad Afnan Talib Umer Ashraf College of Environmental Science and Engineering Guilin University of TechnologyGuilinGuangxi 541004China School of Environmental Studies China University of GeosciencesWuhan430074China Department of Environmental Sciences PMAS Arid Agriculture UniversityRawalpindiPakistan Institute of Geophysics and Geomatics China University of GeosciencesWuhan430074China

Undeniably water is of utmost importance while considering basic *** investigation emphasized on the hydrochemical evaluation and drinking water quality assessment in District Jacobabad located in lower Indus plain,*** world's largest irrigation system emerged from Indus Basin,which is underlain by well transmissive aquifer resulting in higher water *** supply schemes with their water sources from ground water and surface water provide piped water for drinking purpose to the *** samples were collected from all the forty eight supply schemes of which thirty two were found *** parameters were compared with World Health Organization(WHO)and Pakistan water quality Standards but adversely substantial samples were found ***,bicarbonate and nitrate met the standard safe limits while values for EC,TDS,hardness,cations and anions exceeded the limits in numerous *** and ArcGIS softwares were used for statistical analysis and spatial distribution of *** facies were developed and suitability assessment of water resources was examined for agricultural *** ground water type was classified as Na-HCO3 type with high salinity and it required treatment prior to *** proposed research exhibited the probable drinking water contamination sources and it demanded instant actions to further protect the valuable drinking water resources in District Jacobabad.

关键词： water quality assessment water supply schemes drinking and agriculture arsenic ArcGIS Pakistan

Coastal water quality assessment by Self-Organizing Map

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Transactions of Tianjin University 2005年第6期11卷 446-451页

作者：牛志广张宏伟张颖 School of Environment Science and Engineering Tianjin UniversityTianjin 300072China College of Environment Science and Engineering Nankai UniversityTianjin 300071China

A new approach to coastal water quality assessment was put forward through study on self-organizing map （ SOM ）. Firstly, the water quality data of Bohai Bay from 1999 to 2002 were prepared. Then, a set of software for coastal water quality assessment was developed based on the batch version algorithm of SOM and SOM toolbox in MATLAB environment. Furthermore. the training results of SOM could be analyzed with single water quality indexes, the value of N ： PC atomic ratio） and the eutrophication index E so that the data were clustered into five different pollution types using k-means clustering method. Finally, it was realized that the monitoring data serial trajectory could be tracked and the new data be classified and assessed automatically. Through application it is found that this study helps to analyze and assess the coastal water quality by several kinds of graphics, which offers an easy decision support for recognizing pollution status and taking corresponding measures.

关键词： self-organizing map ( SOM ), coastal marine water quality assessment pollution types

维普期刊数据库

water quality assessment of the Shatt al-Arab River,Southern Iraq

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Journal of Coastal Life Medicine 2015年第6期 459-465页

作者： Mohammad Salim Moyel Najah Aboud Hussain Department of Marine Environmental Chemistry Marine Science CentreBasrah UniversityBasraIraq Department of Ecology College of ScienceBasrah UniversityBasraIraq

Objective:To assess suitability of the water quality of Shatt al-Arab River for protection of aquatic life,potable water supply and irrigation ***:The Shatt al-Arab River was monitored on a monthly basis from July 2009 to June 2010.A water quality index(WQI)was calculated to assess the suitability of water for protection of aquatic life,potable water supply and irrigation uses during the dry season from July to December 2009 and the wet season from January until June ***:The results of the WQI showed that the lowest water quality values were scored during the dry season for all three uses of the *** water quality values were recorded for protection of aquatic life and fair(upstream)to poor(downstream)water quality values were recorded for irrigation ***,the river water was not suitable for potable water supply without elaborate ***:Deterioration of the Shatt al-Arab water quality has been attributed to reduced freshwater discharges from Tigris and Euphrates Rivers,low annual precipitations and an advancing salt wedge from the Arabian ***,a combination of those factors such as low riverine discharge and advancing salt wedge with a continuous discharge of agriculture,oil industry and urban point effluent has polluted the waters and fostered the decline of the Shatt al-Arab River water quality during the study *** study indicated that application of WQIs was a useful tool to monitor and assess the overall water quality of the Shatt al-Arab River.

关键词： water quality assessment water quality index Shatt al-Arab River

water quality assessment of Dachangshan ArtificialHabitat Development Demonstration Area

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Animal Husbandry and Feed Science 2018年第4期10卷 226-230,240页

作者： Zhang Lu Tian Tao Ma Zhi Liu Yonghu Yang Jun Liu Hanchao li xue Center for Marine Ranching Engineering Science Research of Liaoning Province Dalian Ocean University Dalian 116023 China Supervisionof Fishing Port in Jinpu New District Dalian 116600 China 不详

[Objective] The paper was to evaluate the water quality environment in Dachangshan artificial habitat development demonstration area.[Method] From 2013 to 2015, an environmental survey was conducted for eight voyages in Dachangshan artificial habitat development demonstration area of Changhai County, Dalian City, and 20 hydrochemical indexes including salinity, pH, and COD were monitored. The water quality of thesea area was analyzed by principal component analysis and single factor index method. [Result] Except for that the control area of the August 2014voyage belonged to IIclass sea water standard, the water quality in other stations of all voyages conformed toIclass sea water standard. Totally 20water quality indicators were synthesized into six principal components using principal component analysis, which explained 79.165% of the results;the principal component score was ranged from -1.536 to 3.706; the score in August 2014 was the highest, and the evaluation results were basicallyconsistent with the results of single factor index analysis. [Conclusion] The overall water quality is good in Dachangshan artificial habitat development demonstration area.

关键词： Dachangshan Artificial habitat development water quality assessment Principal component analysis Single factor index method

FUZZY CLUSTERING ANALYSIS IN water quality assessment:A CASE STUDY FOR DIANSHAN LAKE,SHANGHAI,CHINA

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Journal of Geographical Sciences 1993年第4期 16-28页

作者： Hsiangte Kung Long-gen Ying Department of Geography and Planning Memphis State University

water quality assessment has been one of the most important fields in Environmental Impact assessment(EIA)for federally funded *** 1964,when Horton devised and implemented the first water quality index(WQI),consideration has been placed on the development of index methods:The WQI allows measurement of constituents to be transformed into a common unit *** aggregated measuring score on a WQI scale for overall *** critical issue for most WQI designers is to know how a WQI can be constructed in a simplistic way so that the right information can be extracted from the measurements,and then to illustrate its spatial variation and changes with *** to some reviewersofEIA methods,the weighing technique in the EIA processing has not been solved yet,and more powerful methods other than"judgment"need to be identified and *** paper presents a method of fuzzy clustering analysis of water quality evaluation for Dianshan Lake,Shanghai,*** clustering analysis may be used whenever a composite classification of water quality incorporating multiple parameters *** such a case,fuzzy clustering analysis may be used as a complement or an alternative for comprehensive assessment of water quality.

关键词： water quality assessment fuzzy clustering analysis Dianshan Lake Shanghai

water quality characteristics and assessment of Yongding New River by improved comprehensive water quality identification index based on game theory

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Journal of Environmental Sciences 2021年第6期33卷 40-52页

作者： Yu Liu Yucheng Hu Yumei Hu Yuqi Gao Zhenying Liu School of Earth System Science Institute of Surface-Earth System ScienceTianjin UniversityTianjin 300072China Tianjin Hydraulic Science Research Institute Tianjin 300061China School of Mathematics Tianjin UniversityTianjin 300072China School of Environmental Science and Safety Engineering Tianjin University of TechnologyTianjin 300191China

The Yongding New River is essential for the water supplies of *** date,there is no comprehensive report that assesses the year-round water quality of the Yongding New River Main ***,little attention has been given to determining a combined weight for improving the traditional comprehensive water quality identification index(ICWQII)by the game *** water quality parameters were investigated monthly along the main stream of the Yongding New River from May 2018 to April *** contaminants and nitrogen pollution were mainly caused by point sources pollution,and the total phosphorus mainly by non-point source *** spatio-temporal variations of water quality parameters were jointly caused by different pollutant sources and hydrometeorological *** terms of this study,an improved comprehensive water quality identification index(ICWQII)based on entropy weight or variation coefficient and traditional CWQII underestimated the water qualities,and an ICWQII based on the superstandard multiple method overvalued the *** contrast,water qualities assessments done with an ICWQII based on the game theory matched perfectly with the practical *** ICWQII based on game theory proposed in this study takes into account not only the degree of disorder and variation of water quality data,but also the influence of standard-exceeded pollution indicators,whose results are relatively *** findings and the ICWQII based on game theory can provide scientific support for decisions related to the water environment management of the Yongding New River and other waters.

关键词： water quality assessment Improved comprehensive water quality identification index Game theory Combined weight Spatio-temporal variation Yongding New River

维普期刊数据库

A comparative study of single factor and multivariate statistical methods for surface water quality assessment

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A comparative study of single factor and multivariate statis...

Research on Aggregative Index Number Method in water quality assessment Based on SVM

中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Yanlong Kong Zhonghe Pang Chunyong Wu Miao Jing Key Laboratory of Engineering Geomechanics Institute of Geology and GeophysicsChinese Academy of Sciences China Nuclear Power Engineering Co.Ltd Inner Mongolia Geological Engineering Co.Ltd

water quality assessment is an essential part of water resources *** methods,including the single factor(SF)method and multivariate analysis,employed in assessing water quality can give different *** this study,SF methods and multivariate analysis-including discriminant analysis(DA)and the distance function model(DFM)-were used to assess the water quality of Xinlicheng Reservoir in Northeast China,and the advantages and disadvantages for each method are *** from the SF method show water quality to be Class 4,while results from the DA and DFM methods show it to be Class 3,according to the Surface water Standard in *** concentration of total nitrogen is most polluted amongst all the evaluating factors(as a result of human activities),leading to a Class 4 result with the SF *** alteration of an individual factor has little impact on the results of the DA and DFM methods,since they integrate the features of the all of the evaluating *** anthropogenic pollution generally alters only a few evaluating factors,DA and the DFM are more useful for polluted water quality assessment than SF *** DA and DFM methods should be used with sufficient consideration of their mathematical requirements to prevent misinterpretation of the results.

关键词： Discriminant analysis Distance function model Single factor method water quality assessment Xinlicheng Reservoir

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Research on Aggregative Index Number Method in Water Quality...

assessment of water quality in High-Pressure Peruvian Anthropic Sectors of Lake Titicaca Using a Calibrated Index

2009 9th International Conference on Electronic Measurement & Instruments（ICEMI’2009）

作者： Jian Cao 1 Hongsheng Hu 1 Suxiang Qian 1 Kewen Xu 2 1 College of Mechanical & Electrical Engineering Jiaxing University Jiaxing Zhejiang China 2 Hydrological Stations of Jiaxing Jiaxing Zhejiang China

On the basis of analysis of water quality assessment methods, an aggregative index number model in water quality evaluation is put forward in this paper. There are totally six indexes selected as evaluation parameters in this model, including DO, potassium permanganate, BOD5, NH3-N, total quantity of phosphorus and total quantity of nitrogen. Besides, this model fully considers their differences existed in different categories of water quality and pollutant contents of the same category water quality. And this established model overcomes its drawbacks of inadequate for the single factor model in water quality assessment. Further, combined with its advantages of Support vector machine （SVM） in solving small sample with, nonlinear and high dimension problems, an aggregative index number method in water quality assessment based on SVM is established. The test results show that the method proposed in this paper has a very high correct ratio of evaluation, and has a good engineering application prospect.

关键词： water quality assessment SVM aggregative index number weighted index.

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Journal of Geoscience and Environment Protection 2024年第8期12卷 97-114页

作者： Stive Flores-Gómez Adilson Ben Da Costa Eduardo A. Lobo Graduate Program in Environmental Technology University of Santa Cruz do Sul (UNISC) Santa Cruz do Sul Brazil

The world’s lakes are in the process of degradation, with loss of water quality as a result of anthropic influences. This research aimed to evaluate water quality in high-pressure Peruvian anthropic sectors of Lake Titicaca using a calibrated index. The study considered ten important bays with influence from urban sectors. In each bay, surface waters were monitored for six years, considering physical, chemical and microbiological parameters. water quality was assessed using the NSF water quality Index (NSF-WQI) and the one calibrated for Lake Titicaca (WQIT). Comparing the efficiency of these two indices, the WQIT showed a variation from moderately polluted bays to bad quality bays, such as Desaguadero and Yunguyo. These two bays were classified as hypereutrophic, therefore, the uses attributable to this condition are only irrigation and energy production. Applying the NSF-WQI, the results were not able to identify this significative difference, as all bays were classified as moderate quality waters. This result indicates that the WQIT calibration was adequate, as it allows inferring and estimating the water quality of Lake Titicaca with greater precision. According to Peru’s water quality standard for category 4, established for the conservation of the country’s lakes, the parameters that exceeded the standard values were PO4-P (0.035 mg∙L−1) and BOD5 (5 mg∙L−1) in all bays, and TC (1000 MPN mL−1) in Yunguyo bay. These high values indicate eutrophication processes, one of the main problems in the study area. The WQIT calibrated for Lake Titicaca can be used as an efficient tool to assess water quality in high Andean lentic waterbodies in South America.

关键词： Andean Lakes water quality assessment Eutrophication water quality Index (WQIT)