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River channel flood discharge early warning method based on hydraulic simulation

A hydraulic simulation and river channel technology, applied in the hydraulic model, etc., can solve the problems of accidental errors in judgment results, lack of accurate and quantitative judgment standards, and reduced reliability, so as to improve work efficiency, avoid accidental factors, and judge The effect determined by the result

Active Publication Date: 2020-02-28
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

Therefore, there are subjective deviations in the flood rise and peak arrival times judged based on artificial experience, and different people, or even the same person, may come to different conclusions based on different judgments. Large occasional errors, making it less reliable

Method used

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  • River channel flood discharge early warning method based on hydraulic simulation
  • River channel flood discharge early warning method based on hydraulic simulation
  • River channel flood discharge early warning method based on hydraulic simulation

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Embodiment 1

[0050] In this embodiment, take the 120km river section (called B river section) downstream of the X reservoir on the A river as an example, according to figure 1 The shown method performs hydraulic simulation and analysis and early warning of river flood evolution, so as to demonstrate the effect achieved by the present invention.

[0051] The A River flows through China's Qinghai Province and Sichuan Province, and finally flows into the upper reaches of the Yangtze River. The total length is 1,571 kilometers, 1,357 kilometers in Sichuan, the drainage area is 136,000 square kilometers, and the average flow rate of the estuary is 1,860 cubic meters per second. The X Reservoir is located in the middle and lower reaches of the A River, including two-stage hydropower stations, with a total installed capacity of 8.4 million kW, a reservoir storage capacity of 7.76 billion cubic meters, and an average annual flow rate of about 1,220 cubic meters per second at the dam site. After t...

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Abstract

The invention discloses a river channel flood discharge early warning method based on hydraulic simulation, and relates to the field of river channel flood routing and early warning. As reservoir flood discharge and river channel natural flow processes have obvious difference, on the basis of constructing a one-dimensional hydraulic model for a river channel, each obtained fracture surface water level sequence is simulated according to the model, and the flood rising time, flood peak reaching time and corresponding rising water level and peak value water level due to reservoir flood dischargeare automatically identified and extracted. The method is suitable for hydraulic simulation of the river channel, flood propagation time and magnitude prediction, has universality, is simple and easyto operate, can calculate flood propagation process according to a drainage plan of a hydraulic building or hydrological prediction of a natural river channel, and provides early warning information for disaster prevention and reduction of a downstream area.

Description

technical field [0001] The invention relates to the field of river flood calculus and early warning, in particular to a hydraulic simulation-based early warning method for river flood discharge. Background technique [0002] River flood routing refers to simulating the flow, water level, water depth and other hydraulic elements of each section by constructing a river hydraulic model and inputting the upstream and downstream flow (or water level) of the river section when the flood comes as boundary conditions. Flood early warning refers to the estimation of the coming time and magnitude of floods based on calculation simulation or past experience, which is extremely important for ensuring human activities, production and life along the river. Flood routing and early warning technology is widely used in water resources management, reservoir dispatching, water conservancy project planning and operation, flood control and disaster reduction and other fields. [0003] For flood...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B1/02
CPCE02B1/02
Inventor 魏隽煜廖卫红雷晓辉王家彪杨明祥王超王旭秦韬蔡思宇孙庆宇
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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