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Numerical simulation method for overtopping burst flood of earth and rockfill dam containing reservoir area

A numerical simulation and earth-rock dam technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as disasters, achieve the effects of improving accuracy, perfecting calculation methods, and improving numerical accuracy

Active Publication Date: 2019-10-22
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

Once the reservoir dam fails, it will bring huge disaster to the downstream

Method used

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  • Numerical simulation method for overtopping burst flood of earth and rockfill dam containing reservoir area
  • Numerical simulation method for overtopping burst flood of earth and rockfill dam containing reservoir area
  • Numerical simulation method for overtopping burst flood of earth and rockfill dam containing reservoir area

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Embodiment Construction

[0031] Attached below figure 1 And figure 2 The present invention will be further explained.

[0032] The present invention is a method for numerical simulation of flood overtopping of an earth-rock dam including a reservoir area. The reservoir area is included in the entire calculation area. The simulation of the outflow process of the earth-rock dam breach is carried out in a unified manner with the flood evolution simulation of the reservoir area and the downstream inundation area. Specific steps are as follows:

[0033] 1) Obtain the required basic data: The basic data includes the underwater topographic data of the reservoir area (scale 1:5000 and above); dam body related data, including dam height, dam length, dam crest width, front and back water surfaces Slope, dam material viscosity coefficient, particle size gradation, etc.; topographic data of dam-break inundation area (scale 1:10000 and above); DOM topographic data of the entire calculation area (resolution 2m and abo...

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Abstract

The invention discloses a numerical simulation method for overtopping burst flood of an earth and rockfill dam containing a reservoir area. The reservoir area and the downstream submerged area are subdivided through triangular non-structural grids, and the area where the dam body is located does not participate in subdivision. The outlet flow of the breach serves as the outlet boundary of the reservoir area and the inlet boundary of the downstream submerged area, hydrodynamic evolution calculation of the reservoir area and the downstream submerged area is conducted. The dam front unit and thedam rear unit corresponding to the outlet boundary and the inlet boundary are dynamically adjusted according to the real-time width of the breach. The method not only can provide a downstream submerging form, but also can provide a water flow movement process in the reservoir area. Therefore, the application range of the dam break model is expanded. When breach outflow is calculated, the average water level of the dam front unit directly connected with the breach instead of the average water level of the whole reservoir area is used. The accuracy of the breach outflow process can be remarkablyimproved. Therefore, an existing earth and rockfill dam burst flood calculation method is perfected. The numerical precision of earth and rockfill dam burst flood calculation is improved.

Description

Technical field [0001] The invention relates to the field of water conservancy engineering, in particular to the field of flood prevention and disaster reduction, and in particular to a numerical simulation method for floods caused by overtopping of an earth-rock dam including a reservoir area. Background technique [0002] my country is the country with the largest number of reservoirs and dams in the world. According to the statistics of the first national water conservancy survey, there are 98,002 reservoir dams in my country, of which earth-rock dams are the most widely used dam type, accounting for 95% of the total number of dams built. %the above. Most of the earth-rock dams that have been built are small reservoirs. Due to special historical reasons, these small earth-rock dams lack strict design and construction procedures when they are built, and there is a relatively large risk of failure when encountering excessive floods. . Once the dam of the reservoir fails, it wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02A10/40
Inventor 张大伟孙东亚权锦刘启华刘柏君
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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