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Re-constructing the river bed using the streamline-generation method
Zohre Aghamolaei1, Masoud-Reza Hessami Kermani1
1Department of Civil Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran.
Methodsx
|January 26, 2024
Summary
This study reconstructs riverbeds using Laplace equations for hydrodynamic simulations. The developed method accurately determines riverbed bottom lines and flood paths cost-effectively.
Area of Science:
- Geosciences
- Computational Fluid Dynamics
- River Engineering
Background:
- Accurate riverbed reconstruction is crucial for hydrodynamic simulations and understanding river morphology.
- Traditional field surveys for determining riverbed bottom lines are prohibitively expensive.
- Identifying the riverbed's concave line is key to predicting flood paths.
Purpose of the Study:
- To develop a cost-effective method for riverbed reconstruction and bottom line determination.
- To enable accurate hydrodynamic simulations and morphological process analysis.
- To facilitate low-cost flood trending by identifying riverbed flood paths.
Main Methods:
- Reconstruction of 2D river geometry utilizing the Laplace equation.
- Numerical solution of streamlines within the physical domain using the Finite Element Method (FEM).
- Numerical solution of streamlines within the physical domain using the Finite Difference Method (FDM).
Main Results:
- Successful determination of the riverbed bottom line for the meandering Qinhe River (China) and Gaz River (Iran).
- Demonstrated cost reduction compared to traditional field survey methods for riverbed data acquisition.
- Established a method for effective flood trending through accurate determination of riverbed concave lines.
Conclusions:
- The proposed method provides an efficient and economical approach to riverbed reconstruction.
- Laplace equation-based streamline solutions are effective for determining critical riverbed features.
- This research offers practical applications in river management and flood risk assessment.
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