REAERATION COEFFICIENT FOR THREE STRETCHES OF THE POMBA RIVER (MG) GOTTEN IN THE RAINY AND DRY PERIODS

Authors

  • Antonio Teixeira de Matos
  • Thomé Vidigal de Almeida
  • Demetrius David da Silva
  • José de Alencar Pinto Farage

DOI:

https://doi.org/10.13083/reveng.v19i4.322

Keywords:

autodepuração, coeficiente de oxigenação, qualidade da água

Abstract

For characterization the potential of self-purification of the course of water, it was obtained the reaeration coefficient (K2) in three streches of the Pomba River, Minas Gerais State, Brazil, in two different periods of the year of 2005 (of July to August and of October to November). The K2 value was gotten by calculation, with the variables water temperature, local altitude, dissolved oxygen concentration (OD) in the mixture point, BOD, water speed, deoxigenation coefficient (K1), traveled distance and OD concentration in the end of the passage) substitution in the Streeter-Phelps (1925) equation. The K2 values were among 0.4 to 2.0 d-1, in the dry period, and among 0.6 to 0.9 d-1, in the period rainy. The highest values of K2 they came in the area of more mountainous relief, where the Pomba River was more shallow and turbulent. Mathematical equations of K2 as function of the speed and depth of the course of water were also adjusted, being used the potential model.

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How to Cite

Matos, A. T. de, Almeida, T. V. de, Silva, D. D. da, & Farage, J. de A. P. (2011). REAERATION COEFFICIENT FOR THREE STRETCHES OF THE POMBA RIVER (MG) GOTTEN IN THE RAINY AND DRY PERIODS. Engineering in Agriculture, 19(4), 361–369. https://doi.org/10.13083/reveng.v19i4.322

Issue

Vol. 19 No. 4 (2011)

Section

Water and environmental resources

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