Reservoir Operation and Early Warning Method Based on Meteorological Numerical Forecast

Abstract

The invention discloses a reservoir dispatching and early warning method based on meteorological numerical forecast, which calculates the amount of water that can be stored in the watershed according to the collected hydrological information of each hydropower station in the watershed of the target reservoir, and corrects the pre-influenced rainfall Pa according to the amount of water that can be stored; The runoff coefficient ρ is determined based on the runoff coefficient ρ, and the reservoir can store clean water and precipitation based on the runoff coefficient ρ, and carry out early warning of the stored precipitation; according to hydrological information, river basin information, previous impact rainfall Pa, runoff coefficient The information is used to forecast the short-term runoff of the reservoir and calculate the end-of-term water level in the medium and long term; determine the flood control and drought warning levels according to the hydrological information, meteorological information and end-of-period water level information, and carry out reservoir scheduling. The invention has the following beneficial effects: the risk early warning ability of reservoir dispatching is improved, and the safety of life and property of people in the dam of the reservoir and downstream is ensured.

Description

technical field [0001] The invention relates to the technical field of flood control and drought relief in reservoirs and watersheds, in particular to a reservoir dispatching early warning based on meteorological numerical forecast, which can improve the early warning capability of reservoir dispatching risks, and provide flood control and drought relief early warning, precipitation capable precipitation early warning and dispatching scheme for target reservoir watersheds. method. Background technique [0002] Reservoir dispatching includes flood control dispatching and benefit dispatching, readjustment of natural incoming water through water conservancy facilities, intercepting floods during flood season to reduce flood peaks, reducing upstream and downstream disaster losses, reducing reservoir water abandonment, increasing power generation benefits, and increasing river water supply during non-flood seasons. The comprehensive utilization of downstream ecological environmen...

AI Technical Summary

Problems solved by technology

Secondly, limited by conditions, most reservoirs can only understand the meteorological and water and rain information of the basin where the reservoir is located, and can only formulate dispatching countermeasures for the floods that occur in the basin, lacking the concept and awareness of comprehensive dispatching of the entire basin. When major floods occur in the downstream and adjacent river basins, due to insufficient grasp of the water conditions in other river basins, the downstream peak-staggered dispatching will easily lead to limited flood control dispatching in the target reservoir basin, poor flood drainage, abnormal rise in reservoir water level, etc., increasing the risk of urban flood control , causing greater losses, and also causing unnecessary water abandonment in the downstream cascade reservoirs, reducing the water utilization rate, causing greater safety hazards to the reservoir dam and downstream, and increasing the risk of reservoir dispatching

Thirdly, due to insufficient data and technology, small and medium-sized reservoirs in the basin cannot effectively carry out reservoir regulation and early warning, which also causes corresponding water loss

Therefore, there are scheduling risks of flood control and drought resistance in the normal operation of the reservoir.

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