Assessment of Management Scenarios for the Remediation of River Water Quality Based on Self-Purification (Case Study: Dez River)

نوع مقاله : مطالعه موردی

نویسندگان

1 Postdoctoral Researcher, Dept. of Water Engineering, University of Tabriz, Tabriz, Iran

2 Prof., Dept. of Water Engineering, University of Tabriz, Tabriz, Iran

چکیده

The most sustainable and cost-effective approach to enhance river water quality is by actively managing its self-purification. This study's aim is to explore potential management scenarios for enhancing the river's self-purification capacity. The QUAL2Kw model was used to simulate the water quality and self-purification capacity in Dez River in Iran. The model was calibrated and validated using recorded data of three monitoring stations along the river. Five parameters, namely DO, BOD, COD, NO3-N, and NH4-N were calculated and compared with field data. The Margin of Safety was presented and added to the value of each parameter for better water management and protection. Sensitivity analysis was conducted to identify the most influential parameters in water quality simulation for Dez River. The study presented and compared the self-purification capacity across six proposed scenarios for managing water quality. The results showed that the oxidation rate, nitrification rate, and denitrification rate were the most influential parameters in simulating water quality using QUAL2Kw. Among the scenarios considered, the fourth scenario, which included urban and industrial sewage point sources as diffuse sources, exhibited the highest level of self-purification, estimated at 2,246,170.01 kg/day. In all scenarios, the self-purification capacity for COD exceeded that of other parameters along the river, with the highest COD self-purification reaching approximately 167,034.9 kg/day.

کلیدواژه‌ها


عنوان مقاله [English]

Assessment of Management Scenarios for the Remediation of River Water Quality Based on Self-Purification (Case Study: Dez River)

نویسندگان [English]

  • Omid Babamiri 1
  • Yagob Dinpashoh 2
1 Postdoctoral Researcher, Dept. of Water Engineering, University of Tabriz, Tabriz, Iran
2 Prof., Dept. of Water Engineering, University of Tabriz, Tabriz, Iran
چکیده [English]

The most sustainable and cost-effective approach to enhance river water quality is by actively managing its self-purification. This study's aim is to explore potential management scenarios for enhancing the river's self-purification capacity. The QUAL2Kw model was used to simulate the water quality and self-purification capacity in Dez River in Iran. The model was calibrated and validated using recorded data of three monitoring stations along the river. Five parameters, namely DO, BOD, COD, NO3-N, and NH4-N were calculated and compared with field data. The Margin of Safety was presented and added to the value of each parameter for better water management and protection. Sensitivity analysis was conducted to identify the most influential parameters in water quality simulation for Dez River. The study presented and compared the self-purification capacity across six proposed scenarios for managing water quality. The results showed that the oxidation rate, nitrification rate, and denitrification rate were the most influential parameters in simulating water quality using QUAL2Kw. Among the scenarios considered, the fourth scenario, which included urban and industrial sewage point sources as diffuse sources, exhibited the highest level of self-purification, estimated at 2,246,170.01 kg/day. In all scenarios, the self-purification capacity for COD exceeded that of other parameters along the river, with the highest COD self-purification reaching approximately 167,034.9 kg/day.

کلیدواژه‌ها [English]

  • Margin of Safety
  • QUAL2KW Model
  • Self-Purification
  • Sensitivity Analysis
  • Water Quality
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