التغي ا رت الموسمية لبعض العناصر المغذية في مياه نهر دجلة ضمن محافظة ميسان

This research was contained study of nitrate and phosphate concentration as well as pH , EC , turbidity , and DO for water of Tigris River within Misan Governorate. Samples were collected from six stations (Ali Al-Garbi , Amara Al-Moahad, AL-Jumhoriah bridge , Al-Wihda, Qalat Saleh, and Al-Azir) during two seasons , Summer 2008 and Winter 2009 . Mean of nitrate concentration in both seasons were (5.616 and 5.008) mg.1-1 respectively. The high concentration was recorded in Al-Azir station in both seasons (6.08 and 5.29) mg.1-1 respectively, and high significant correlation was found between nitrate concentration and turbidity (0.744**, 0.772**) seasonally. Mean of phosphate concentration in Tiger River were (0.905, 0.963) mg.1-1 during different seasons , high significant correlation was found between phosphate concentration and turbidity (0.793**, 0.814**) respectively. Generally, concentration of nitrate and phosphate increased forward south