The doctoral thesis of the student Muhammad Jabbar Mawat was discussed at the University of Basra, College of Engineering, Department of Civil Engineering, entitled Water Quality modeling of shatt al arab river using two dimensional hydrodynamic model. The thesis included the use of a geographic information system to modify a high-resolution topographical database obtained from the NASA website. It used the most recent photographic cross-sections surveyed in 2014 of the Shatt al-Arab River, while a field survey was conducted to create cross-sections of the river branching within the city of Basra, which may be... The comprehensive model of the Shatt al-Arab River consists of three secondary models: hydrodynamic models, temperature, and water presence Through modeling the construction of the regulator near the port of Abu Flus, several operational scenarios were chosen for the regulator. The results of levels along the two rivers showed the best scenario for flood control Upstream ws refranc The results showed a slight increase in organic nitrogen, nitrate, ammonia, organic phosphorus, inorganic phosphorus, and carbon biochemical oxygen demand by (4.76, 3.61, 7.23, 4.44, 2.76, 12.27)%, respectively, and a decrease in dissolved oxygen by 2.6%