Method for predicting flood peak flow of earth-rock dam overtopping breach
By improving the earth-rock dam failure model, detailed calculations of the breach flow and erosion at the dam crest are performed. Combined with dam stability, the problems of insufficient calculation accuracy and applicability of existing models are solved, achieving higher accuracy in predicting dam failure peak flow. This model is suitable for emergency assessment and flood control planning of earth-rock dam failures.
Patent Information
- Application Number
- CN202211060296.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-31
- Publication Date
- 2026-08-11
- Estimated Expiration
- 2042-08-31
AI Technical Summary
Existing earth-rock dam failure prediction models suffer from poor applicability, low calculation accuracy, or excessive time consumption when calculating dam break peak flow. In particular, the mathematical models are too simplistic in calculating the breach flow, resulting in large errors in the calculation results.
An improved model for predicting peak flow of overtopping breach floods in earth-rock dams was developed. By calculating the flow and erosion at the breach crest in detail, and considering the stability of the dam body within the breach area, a new algorithm and iterative calculation method were adopted. Combining the dam material properties and hydrodynamic principles, the model calculates the flow rate, water depth, flow velocity, and erosion rate at the breach crest. The terrain was adjusted to improve the calculation accuracy.
It improves the accuracy and applicability of predicting peak flow rates during earth-rock dam breaches, reduces sensitivity to initial breach size, provides more reliable support for emergency response plans, and the calculation results have smaller errors compared to measured results.