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Application of Water Quality Index and Water Quality Model QUAL2K for Evaluation of Pollutants in Dez River, Iran

Authors
  • Samaneh Abdeveis,1
  • Sedghi, Hossein1
  • Hassonizadeh, Houshang2
  • Babazadeh, Hossein1
  • 1 Department of Water Engineering, Science and Research Branch, Islamic Azad University, Tehran, 1477893855, Iran , Tehran (Iran)
  • 2 Department of Civil Engineering, Islamic Azad University, Shoshtar, 6451741117, Iran , Shoshtar (Iran)
Type
Published Article
Journal
Water Resources
Publisher
Pleiades Publishing
Publication Date
Sep 15, 2020
Volume
47
Issue
5
Pages
892–903
Identifiers
DOI: 10.1134/S0097807820050188
Source
Springer Nature
Keywords
License
Yellow

Abstract

AbstractDez River in Iran is a long river and has generally good-quality water. Unfortunately, in this river water quality has decreased over recent years due to drought, industrial and agricultural developments. Dez River plays a significant role in moderating the quality of Karun River After adjoining it. So, maintaining good water quality of Dez River is very important. In this case study, water quality index was evaluated in an 8-year period with regard to the growth of industry and drought occurrence. The calculated Iran Water Quality Index showed values of 70.1–85. This index reduced from extremely good to good for DEZ River. Simulation of some water quality parameters (electrical conductivity, dissolved oxygen, carbonaceous biochemical oxygen demand, NH4-N, NO3-N, and pH) were evaluated using Water Quality Model (Qual2k). The observed data in July 2012 and March 2013 were used for calibration and validation of the Qual2k model respectively. In conclusion, the Qual2k model was proposed as a suitable tool for water quality assessment and forecast in the future.

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