Surface Water Quality Assessment of Panchagnaga River and Development of DO-BOD Relationship Using Empirical Approach

Authors

  • Shilpa Yakkerimath KLS Gogte Institute of Technology, Department of Chemistry, Belagavi, Karnataka
  • Sanjaykumar Divekar KLS Gogte Institute of Technology, Department of Chemistry, Belagavi, Karnataka
  • Chidanand Patil KLE Dr. M.S. Sheshgiri College of Engineering and Technology, Belagavi, Karnataka
  • Amruth A KLE Dr. M.S. Sheshgiri College of Engineering and Technology, Belagavi, Karnataka
  • Purandara Bekal Centre for Studies on Natural Disaster Management and Skill Development, Shindolli Road, P O Mutaga, Belagavi, Karnataka

DOI:

https://doi.org/10.30564/hsme.v3i2.4121

Abstract

Surface water samples were collected from selected locations along river Panchaganga, from Kolhapur to Narsobawadi during April 2019. Physicochemical parameters were determined in the laboratory and chemical mass balance approach was adopted to estimate the individual ionic loads in the river water. Streeter-Phelps equation was applied to derive a relationship between DO and BOD5. Model parameters such as De-oxygenation Rate (Kd) and Re-aeration Rates (Kr ) were optimized using different empirical methods. The result of chemical mass balance showed an increase in the loading of various ions from upstream to downstream which could be attributed to agricultural and industrial wastes that enter the main stream. De-oxygenation rate and re-aeration constants were calculated using various empirical methods. DO sag curve was developed using Streeter Phelp’s model and compared with the observed parameters which showed a significant correlation. DO-BOD concentration observed along the course of the river indicated that the self-purification capacity of the river is high due to which the river regains the lost DO level at a distance less than 50 meters. 

Keywords:

DO-BOD, Streeter phelp’s model, DO sag curve, Chemical mass balance, Self purification capacity

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Vol. 3 , Iss. 2 (October 2021)

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