Research Article Open Access

Modeling Water Quality in Rivers

Liren Yu1 and N. N.B. Salvador1
  • 1 Department of Civil Engineering, Federal University of São Carlos São Carlos, São Paulo State, 13560, Brazil


This study reports a PC software, used in a Windows-based environment, which was developed based on the first order reaction of Biological Oxygen Demand (BOD) and a modified Streeter and Phelps equation, in order to simulate and determine the variations of Dissolved Oxygen (DO) and of the BOD along with the studied river reaches. The software considers many impacts of environmental factors, such as the different type of discharges (concentrated or punctual source, tributary contribution, distributed source), nitrogenous BOD, BOD sedimentation, photosynthetic production and benthic demand of oxygen, and so on. The software has been used to model the DO profile along one river, with the aim to improve the water quality through suitable engineering measure.

American Journal of Applied Sciences
Volume 2 No. 4, 2005, 881-886


Submitted On: 7 July 2005 Published On: 30 April 2005

How to Cite: Yu, L. & Salvador, N. N. (2005). Modeling Water Quality in Rivers. American Journal of Applied Sciences, 2(4), 881-886.

  • 4 Citations



  • River self-purification
  • water quality model
  • computer modeling
  • aquatic environment