A thesis discussion was held on Wednesday 20-12-2023 in Tigris (Dijilah) Hall. This thesis was presented by student (Hasan Khalid Razaq) and titled as:
“Simulation of Sediment Transport in Al-Musayyab Canal Using HEC-RAS Software”
After discussing the student, listening to his defense, and evaluating the level of the thesis, the student was granted a master’s degree in Water Resources Engineering – Water Resources. With Excellent Degree
The discussion committee was consisted by the following:
Prof. Dr. Mahmoud Salih Mahdi ————————————— Chairman
Prof. Dr. Mohammed Sayoan Shamkhi ————————— Membership
Asst. Prof. Dr. Ameen Mohammed Salih ————————– Membership
Prof. Dr. Basim Sh. Abed ——————————————First Supervisor
Dr. Anmar Jawdat Jassim ————————————– Second Supervisor
The Thesis Summarized as Following: –
The research focuses on sediment transport challenges in the 49.5 km-long Al-Musayyab Canal. Using HEC-RAS software, hydraulic models were employed to evaluate flow characteristics and propose treatments. The one-dimensional sediment transport model indicated elevated water levels, leading to overtopping. Field measurements and laboratory tests provided essential data. The validated model, based on 2014 survey data, showed favorable results with RMSE and R2 values of 0.31 m and 0.85. Sediment transport simulations revealed increasing deposit depths and erosion in 2019 and 2020. Three treatment methods were applied: concrete lining reduced sediment deposition by 62%-76%, grouted rip-raps minimized erosion by 75%-90%, and submerged vanes were the most successful, reducing sediment accumulation by 75%-90%.
The main objectives for this thesis are:
- Develop a comprehensive numerical and hydraulic model using HEC-RAS software (version 6.3) to simulate sediment transport, evaluate sedimentation issues, and analyze steady and unsteady flow characteristics in Al-Musayyab Canal.
- Investigate and analyze the behavior of sediment transport in Al-Musayyab Canal under changing flow conditions, including the depth of deposition and erosion, sediment accumulation rates, and inflow sediment.
- Propose and evaluate several scenarios aimed at controlling sediment transport along Al-Musayyab Canal, considering different management strategies and interventions.
- Propose effective solutions and strategies to reduce sedimentation problems in the canal, aiming to minimize the deposition, erosion, and accumulation of sediments.
Recommendations:
- Conduct a comprehensive study to assess the feasibility of expanding the conveyance area along the canal, enabling it to accommodate discharges exceeding 45 m³/s as per design requirements.
- Implement submerged vanes at the entrance of the Musayyab Canal as a targeted and effective measure to reduce sediment transport from the Euphrates River and mitigate sediment deposition within the canal. We strongly recommend that the Ministry of Water Resources consider the adoption of this approach as it aligns with the research findings, offering a cost-efficient and sustainable solution to address sediment-related challenges in the canal.
- Conduct an in-depth study to explore the feasibility of converting the canal into a closed system. This study aims to minimize losses and effectively manage sediment deposition.
