IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Evaluation of sefidroud riverí»s reaeration-rate coefficient, iran
Evaluation of sefidroud riverí»s reaeration-rate coefficient, iran
Author : MEHDI MOHAMMADIGHALENI(1), KUMARS EBRAHIMI(2), MOHAMMAD HOSEIN OMID(3)
ABSTRACT
Accurate estimation of the reaeration rate coefficient is very important for the purposes of dissolved oxygen and selfpurification
modelling in rivers. The main target of this paper is to evaluate 19 commonly used reaeration rate coefficient
prediction equations, in Sefidroud River, North of IRAN. In this paper the riverí»s dissolved oxygen has been modelled
involving Streeter- Phelps Equation. Then the predicted reaeration rate coefficient results have been compared with four
series of collected and recorded data of the river. The studied reach has a length of 110km, including 12 water quality
sampling stations along the river and it is extended from downstream of Sefidroud dam to the south coast of Caspian Sea.
According to the results, among all equations Parkhurst-Pomeroy equation has shown the most accurate prediction of the
reaeration rate coefficient values, with the statistical criteria of Standard Error (SE), Mean Multiplicative Error (MME) and
Sum of Square of Residuals (SSR) equal to 0.51, 1.05 and 2.35, respectively. Moreover, results indicate that the river has
a high Biochemical Oxygen Demand (BOD) and as well a low Self-Purification capacity, during September, which is
simultaneous with the seepage of non-point agricultural pollutants
File Size : 464,364 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 28/08/2015
Download Now