Evaluation of Temporal and Spatial Variations of Water Quality Parameters in Zohreh River, Iran

  • سال انتشار: 1398
  • محل انتشار: مهندسی بهداشت محیط، دوره: 6، شماره: 2
  • کد COI اختصاصی: JR_AJEHE-6-2_002
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 144
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نویسندگان

Maryam Ravandbakhsh

Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

Yaser Tahmasebi Birgani

Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

Maryam Dastoorpoor

Department of Biostatistics and Epidemiology, Air Pollution and Respiratory Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

Kambiz Ahmadi Angali

Department of Biostatistics, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

چکیده

Discriminant analysis (DA) and principal component analysis (PCA), as multivariate statistical techniques, are used to interpret large complex water quality data and assess their temporal and spatial variation in the basin of the Zohreh river. In this study, data sets of ۱۶ water quality parameters collected from ۱۹۶۶ to ۲۰۱۳) in ۴ stations (۱۵۵۴ observations for each parameter) were analyzed. PCA for data sets of Kheirabad, Poleflour, Chambostan and Dehmolla stations resulted in ۴, ۴, ۴, and ۳ latent factors accounting for ۸۸.۹۸۵%, ۹۳.۸۲۸%, ۸۸.۶۴۸%, and ۸۸.۶۸% of the total variance in water quality parameters, respectively. It is indicated that total dissolved solids (TDS), electrical conductivity (EC), chlorides (Cl−), sodium (Na), sodium absorption ratio (SAR), and %Na were responsible for water quality variations which are mainly related to natural and anthropogenic pollution sources including climate effects, gypsum, and salt crystals in the supratidal of Zohreh river delta, fault zones of Chamshir I and II, drainage of sugarcane fields, and domestic and industrial wastewaters discharge into the river. DA reduced the data set to only seven parameters (discharge, temperature, electrical conductivity, HCO۳-, Cl-, %Na, and T-Hardness), affording more than ۵۸.۵% correct assignations in temporal evaluations and describing responsible parameters for large variations in the quality of the Zohreh river.

کلیدواژه ها

Zohreh River, Water quality, Principal component analysis, Discriminant analysis, Iran

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