Abstract
The physical and chemical parameters of Tigris River water at AL- Kut City have been investigated. Five stations at the river were chosen to perform the study. Monthly samples from all stations were collected during the period from January - December 2015. The result of turbidity values showed height in summer reached to 68 NTU, The decrease of turbidity and the total suspended solids was one of the positive results to the effect of AL-Kut Dam on the Tigris River after the dam. The river water was fresh with a good aerated water with height of the dissolved oxygen value has been reached to 81. 2mg/L. Over saturated Oxygen condition was noticed 878.42 mg/L but the biological demand of oxygen with variation in some values. The result of hydrogen ion concentration values on the weak alkaline side. The Higher values of total hardness were recorded 838mg/L, also the Calcium and magnesium were the main cause of hardness. The most alkaline was caused by carbonate and bicarbonate ions the sulphates were increased to 821 mg/L. The phosphate of the surface water in concentration from 0.12- 1.65 mg/L.
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