WATER QUALITY ASSESSMENT OF TIGRIS RIVER IN ALAMARAH REGION IN IRAQ
Dr. Nabaa Shakir Hadi
College of Engineering, University of Babylon, Babylon, Iraq
ABSTRACT
Water pollution of Tigris River in Al-Amarah region in Iraq (Ali Al-Garbi, Unified water project, Complex water project near the Islamic unity, Castle project,Uzayr project) occurs in both rural and urban areas.Drinking water from natural sources such as rivers and streams is usually polluted by organic substances from upstream users who use water for different activities. To protect the water resources from pollution and deterioration caused by
natural pollutants and human activities, an environmental database was constructed and applied. A Visual Basic Software 6.0 program was constructed to evaluate the pollutant concentrations using regression models obtained by Data Fit Software program (version 8.0). The program was divided into two main parts: first gathering of general data and second calculation of the pollutant concentrations.This research covers thestudy and analysis of monthly
water quality parameters for Tigris River at Ali Al- Garbi, Unified water project, Complex water project near the Islamic unity, Castle project and Uzayr project in Alamarah Region for the period 2008 to 2010. In the present
study, multiple regression models in three forms were used for each design requirement to choose which form gives
the best data fitting. The results of the program were verified with data of year 2011 which were not included in the regression model.This verification showed a good agreement with coefficient of determination between“0.849 to 0.924”. Assessment of water bodies quality should be with standards that have been set to define requirements for various functions and uses as to be compared with the Iraqi, and WHO standards for domestic and irrigation
purposes.The comparison showed that the parameters in the selected stations are within the Iraqi and WHOstandards for domestic and irrigation purposes (Ca: in Ali Al-Garbi). While in other stations are out of limits( Ca: Castle project) and (CL: Unified water project ,Complex water project near the Islamic unity and Uzayr project).
Keywords: Water quality assessment, Regressuion models, Tigris river, Alamarah,Iraq.