Study of Monthly and Annual Changes for Concentration of Elements (Phosphate and Nitrate) Within Stream Tigris River in Some Regions of Wassit Governorate

Abstract

This study was conducted to study the monthly and annual changes of the phosphate and nitrate concentrations in the water of the regions of (Essaouira, Numania, Kut, Muwafaqia and Dujaila) in Wasit governorate by measuring  the concentrations of phosphates and nitrates and measuring the elements (Ec, pH, TDS, Ca, Mg, K, Na) and the samples were taken at the beginning of the month and mid-month and then took the rate of these samples over the full year (for the years  2013, 2014) The results were compared with the Iraqi Standard for Water . Then, statistical models were  used to find the correlation values ​​for the knowledge of phosphate and nitrate values (dependent variables) ​​based on time during the months of the year, and  depend on (pH,EC,TDS, Ca,Mg, K and Na) (Independent variables). The results showed that the value of Phosphate (Po₄) during the year 2013 exceeded the limit allowed during the month of December in the regions (Numaniyah, Kut upstream barrage, Muwafaqiy and Dujaili) and during the month of January in the regions (Muwafaqiya, Dujaili, Kut upstream barrage), while the Nitrates all values ​​within allowable limit of water. During the year 2014, the concentration of the phosphate value exceeded the limit allowed during the month of February in the region of​​ Suwiara and during the month of August in the regions (Muwafaqiya, Kut upstream barrage), while the Nitrates all values ​​within allowable limit of water. While the results of the statistical model showed that there was a high correlation for coefficient of determination (R²) except for the statistical model WQMD for NO₃ equal to 0.581  and WQMM for NO₃ equal to 0.603  and coefficient of determination (R²) for 2014  range between  (0.790-0.373), through value of correlation matrix showed that the values of phosphates and nitrates have a high correlation with the elements (TDS, pH, EC, Na) than other elements