Monthly changes of some nutrient and other ecological factors in the Shatt Al-Arab river south of Iraq

Abstract

This study was conducted to find out the changes in the nutrient and other ecological factors in Shatt Al- Arab River's waters at three sites, which are Al-Hartha, Al-Ashar and Al-Seba. Samples were collected monthly starting from October 2020 to September 2021. It was noted through the study that there were spatial and temporal changes in the nutrient and other indicators in the three Sites. It was found that all the values were within normal standards. The results of measurements of the nutrients and other ecological factors were as follows: The reactive phosphate 0.01 - 1.19 µg/L, reactive nitrite 0.4-9.8 µg/L, reactive nitrate 0.1-14.65µg/L, while the reactive silicate fluctuated between 1.67-15.49 µg/L. Water temperature 14.7-31.4 oC, pH was 7.12-8.16, salinity between 0.1 and 22.1 mg/L, dissolved oxygen 3.4-11.1 mg/L.