‏ Study of the effects of hydro-geomorphology factors on the water quality changes of Siminehrood River at various stations during 2003-2013

Document Type : Research Article

Authors

1 Professor, Department of Geomorphology, Faculty of Geography and Planning, University of Tabriz, Iran

2 Associate Professor, Department of Geomorphology, Faculty of Geography and Planning, University of Tabriz, Iran

3 Assistant Professor, Department of Geomorphology, Faculty of Geography and Planning, University of Tabriz, Iran

4 Associate Professor, Department of Geomorphology, University of Kurdistan, Iran

5 PhD Student, Department of Geomorphology, Faculty of Geography and Planning, University of Tabriz, Iran

Abstract

In this study, the effects of hydro-geomorphology factors on the water quality changes of Siminehrood River and the process of these changes were studied at different spatial and temporal scales. Data related to physical, chemical and hydrological parameters during 2003-2013 were received from the regional water organization of West Azarbaijan province and its seasonal average was calculated for each station. The related maps were extracted using GIS software. Then, the process of changing water quality during different seasons was studied for each station and the relationship between variables and their significance level was achieved by Pearson correlation test and SPSS software. Finally, Schueller and Wilcox diagrams were traced during each station and each season using Chemistry software for assessing the type and chemical quality of river water for drinking water and agricultural purposes. The quality of Kavlan station water during spring with amounts TDS (174.9), EC (269.1) and the concentration of chloride and sulfate ions (0.7) as the most favorable and Miandoab station during summer with amounts TDS (359.3), EC (529.3) and the concentration of chloride and sulfate ions (3.7) were introduced as the most critical spatial and temporal periods, respectively. In all research stations, the decrease of river water quality in form of the increase of EC, TDS and the concentration of chloride and sulfate ions had a direct and meaningful correlation with the discharge variable. In Siminehrood basin, the physical characteristics of the basin and hydro-geomorphology factors play a role in the presence or lack of pollution sources and seasonal-spatial changes of water quality. According to Schueller classification, Siminehrood River water is in a good and quite tasteless category in terms of drinking water. Also, in Wilcox diagram, all the stations are related to the C2S1 class for each season and have a slightly salty quality suitable for agricultural purposes.

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