Volume 23, Issue 3 (Fall 2019)                   jwss 2019, 23(3): 27-36 | Back to browse issues page

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1. Department of Water Engineering, College of Agriculture, Isfahan University of Technology, Isfahan, Iran. , mirhashemi931@yahoo.com
Abstract:   (3641 Views)
Nowadays, environmental pollutions especially water pollution is increasingly developing. One of the problems of entering the pollutants to rivers is reduction in the concentration of river dissolved oxygen. In order to manage the water resources, amount of dissolved oxygen should be predicted. This study presents a novel equation for simulating the concentration of river dissolved oxygen by adding the oxygen production and consumption in the river factors to equation for transmission-diffusion of minerals in the soil. The resultant equation was separated in finite differential method and by using implicit pattern. Calculations were done by encodings in MATLAB software. In order to calibrate and confirm the dissolved oxygen model, data derived from Zayanderood River around Zob-Ahan factory of Isfahan and Mobarakeh Steel Complex was used. By using some data, coefficients of model were determined. Analyzing the sensitivity of model coefficients showed that aeration constant (Kr) had the most effect on predicting the model. Since depends on hydraulic parameters of river, sensitivity of depth and pace of river was studied and finally depth of river was introduced as the most sensitive variable.
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Type of Study: Research | Subject: Ggeneral
Received: 2017/07/31 | Accepted: 2018/09/23 | Published: 2019/12/23

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