Cascade reservoir sediment real-time forecasting method

Abstract

The invention provides a cascade reservoir sediment real-time forecasting method which comprises the following specific steps: step 1, forecasting the flow and sediment content process of a main control station in the next few days according to a water-sediment relation model based on real-time water regime information and a hydrology method; step 2, based on the real-time rain condition information, establishing an interval rainfall sediment production and transportation model to provide a branch flow and a sediment content process of warehousing in the next few days for the main branch; step3, carrying out simulation prediction on the reservoir area water and sediment transport process; and step 4, counting forecast results. According to the method, the incoming sediment amount information of the reservoir in different forecast periods can be mastered and known in time, the method has very important significance in formulating a reservoir scientific dispatching scheme, and the blankof large reservoir sediment forecast on a sediment-deficient river can be filled up.

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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