Water Quality index in Tigris River within Baghdad City

Abstract

This study has been provided to assess the stream water for Tigris River within Baghdad city included five sites Thiraa-Tigris (S1), Al-Muthana bridge (S2), Al-Shuhadaa bridge (S3), Al-Doraa (S4) and meeting place in the Diyala river (S5) and the study extended to stations south of Baghdad city. Ten parameters of water quality were used in this study, Total Hardness (TH), Calcium (Ca), Hydrogen Ion concentration (PH), Chloride (Cl), Magnesium (Mg), Nitrate (NO3), Sodium (Na), Boron (B), Turbidity (TUR) and Sulfate (SO4). The assessment of water quality for river water was done using three methods, Weighted, Arithmetic, Water Quality Index Method (WA WQI), Canadian Council of Ministry of Environmental (CCME WQI), and the third water quality method developed by Erdenebayar. Overall water quality index by the three methods showed Poor to Unsuitable quality index in Tigris River at Baghdad city except for Al-Muthna bridge (S2) was grade good quality index during the time period. From the analysis, it was found that the worst water quality index at the confluence point of Diyala river (S5) and grade unsuitable quality index.