The PhD dissertation of researcher Muhaimin Maher Khader was discussed at the College of Engineering, University of Basra, Department of Civil Engineering, under the supervision of Professor Dr. Sarmad Abdullah Abbas and Dr. Ammar Jassim Dakhel, entitled: Simulation of Water Quality and Suspended Sediment Transport in Al-Gharraf River

‏The thesis investigated water quality and pollutant transport along the Al-Gharraf River through the development of an integrated model combining hydrodynamic and water quality simulations using HEC-RAS and WASP, supported by field and laboratory data collected from different locations along the river.
‏The study assessed the effects of point-source pollution and hydraulic variations on water quality, compared one-dimensional and two-dimensional modeling approaches, and investigated different operational scenarios for the river regulators and their effects on water levels, flow behavior, and pollutant transport. The results showed that pollution sources significantly influence organic matter, nutrient concentrations, and dissolved oxygen levels, while the two-dimensional model provided a more accurate and realistic representation of river behavior. The study also demonstrated that improved regulator operation can enhance hydraulic conditions and water quality, supporting sustainable water resources management and pollution control in the Al-Gharraf River.