Hydrodynamic Evaluation of Hemrin Dam Reservoir: Morphological Examination

Abstract Hemrin Dam reservoir, located in the Diyala River region of Iraq, is a vital component of the water management system, providing flood control, irrigation, and electricity generation. This study presents a meticulous analysis of the dam’s engineering specifications and its hydraulic behavior through the utilization of HEC-RAS software. In order to enhance its role in future protection from risks and achieve public benefit, and using the hydrological program HEC-RAS 6.4.1, a hydraulic simulation model was developed, with the help of climatic data for the study area, and field measurements of the reservoir were established. The boundary conditions of the model are suitable for the discharge parameters and with the help of flow charts, to ensure a complete analysis and evaluation process for various flow states. Using statistical parameters, the model’s performance was verified over a period of three years, and the results showed complete agreement between the simulation and verification results. The process of analyzing the depth, velocity and heights of the water surface inside the dam reservoir revealed the complete characteristics and various geological changes throughout the year of the study area. The results of the study demonstrated the efficiency of the dam in storing large quantities of water, by achieving a maximum water depth of 2.4 metres. The importance of the current study lies in clarifying the reality of the hydraulic behavior of the dam’s reservoir area, with the importance of its effective role in control and storage.