Real-time Forecast Method of Cascade Reservoir Sediment

Abstract

The present invention provides a method for real-time forecasting of cascade reservoir sediment, including the following specific steps: Step 1, based on real-time water regime information and hydrological methods, forecasting the flow and sediment concentration process of the main control station in the next few days according to the water-sediment relationship model ; Step two, based on real-time rainfall information, establish an interval rainfall production and sediment transport model for the main tributaries to provide the tributary flow and sediment concentration process entering the reservoir in the next few days; step three, simulate and forecast the process of water and sediment transport in the reservoir area; Fourth, statistical forecasting results. The invention not only can timely grasp and understand the sediment amount information in different forecast periods of the reservoir, which is of great significance for formulating the scientific scheduling scheme of the reservoir, but also can fill in the blank of sediment prediction of large reservoirs on rivers with less sand.

Description

technical field [0001] The invention relates to the field of real-time sediment forecasting, in particular to a method for real-time forecasting of sediment in cascaded reservoirs. Background technique [0002] In the practice of reservoir operation management and production scheduling, sediment forecast results are the basis for how to minimize reservoir sedimentation and improve the shape of sedimentation in reservoir scientific scheduling. At present, the real-time scheduling and management of reservoirs are mostly based on hydrometeorological information based on water regime forecasting results, but lack of corresponding sediment forecasting results. [0003] The sediment-laden water flow in the river channel belongs to two-phase flow, that is, two phases of water and sand. There are effects of water flow on sediment, sediment on sediment, and sediment on water flow. The incoming water and sediment from the upper reaches change with time, and the riverbed itself is als...

AI Technical Summary

Problems solved by technology

The hydrology-based sediment forecast method applies the traditional flood forecast method to the sediment concentration forecast, which cannot accurately reflect the complex mechanism of water-sediment interaction

In particular, the real-time sediment forecast in the upper reaches of the Yangtze River is still blank, and the sediment concentration in the upper reaches is relatively small (most of the sand peaks have a sediment concentration of 5.0kg / m 3 Below), the duration is short, the sources of water and sediment and the relationship between them are complex, and the hydrological forecasting method is not suitable for real-time forecasting of sediment

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