Abstract
Riverside pit-ponds are one of the hidden dangers of flood control project safety. At present, the safety evaluation of riverside pit-ponds is limited to the seepage and stable safety review of the dam, and the impact of the pit on the river flow is not considered. In this paper, a two-dimensional mathematical model of flow is established. Pressure correction method is used to solve the pressure-velocity coupling. Topographic cutting method is used to deal with the dynamic boundary problem. The model grid of the pit-ponds area is encrypted. The accuracy of the model in the analysis of river hydrodynamics is verified by an example. The model is applied to the evaluation of the impact of the pit-ponds on river flooding. Taking some riverside pit-ponds of the Yellow River as an example, the river water level, velocity, and flow in the present condition and the backfill condition are simulated by the model. The results show that the existence of these riverside pit-ponds only affects the hydrological features of regions around the pit-ponds, and the impact is too insignificant to threaten the hydrological safety. Through the hydrological safety assessment of the project, it is shown that the combination of the two-dimensional flow mathematical model with seepage, anti-sliding, and seismic safety review can comprehensively assess the hydrological safety of dike engineering.
Highlights
As the oldest and most basic flood control facilities, dike projects are widely used in China.At present, the length of the dike project built in China is nearly 420,000 km [1]
The two-dimensional water flow mathematical model is applied in this paper for evaluating the safety of pit-ponds, with the pit-ponds on the riverside of a section of the Yellow River being cited as examples, the current conditions and the backfilling conditions of the pit-ponds are simulated, and the influence of the pit-ponds on the flood flow of the river is analyzed
Based on momentum equation and continuous equation, the two-dimensional flow mathematical model is established, and the accuracy of the model in the analysis of river hydrodynamics is verified by an example
Summary
As the oldest and most basic flood control facilities, dike projects are widely used in China. There are many factors that affect the flood control safety of the dike project, with near dike pit-ponds being one of them. It is of great significance to break through the traditional evaluation method on the problem that riverside pit-ponds affecting flood control safety. The two-dimensional water flow mathematical model is applied in this paper for evaluating the safety of pit-ponds, with the pit-ponds on the riverside of a section of the Yellow River being cited as examples, the current conditions and the backfilling conditions of the pit-ponds are simulated, and the influence of the pit-ponds on the flood flow of the river is analyzed. Combined with seepage, anti-sliding, and a seismic resistance safety review of the dam, the flood control safety of the dike project is comprehensively evaluated, providing a new idea for the safety evaluation and handling of similar projects
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
