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Synchronous combined calculation method for sediment scour and deposition of cascade reservoir

A technology of cascade reservoirs and calculation methods, applied in calculation, design optimization/simulation, special data processing applications, etc., can solve problems such as low calculation efficiency and inability to truly realize joint scheduling of cascade reservoirs, and achieve high calculation efficiency

Inactive Publication Date: 2017-02-15
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a method for synchronous joint calculation of cascade reservoir sediment erosion and sedimentation, which can solve the problem that the existing technology cannot truly realize the joint dispatch of cascade reservoirs, and the method of separate calculation for each reservoir is used, and the problem of low calculation efficiency

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  • Synchronous combined calculation method for sediment scour and deposition of cascade reservoir
  • Synchronous combined calculation method for sediment scour and deposition of cascade reservoir

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Embodiment 1

[0047] The concrete steps of embodiment one are as follows:

[0048] Step 1. Collect data on the topography of the main and tributary streams of Xiluodu, Xiangjiaba and Three Gorges Cascade Reservoirs in the upper reaches of the Yangtze River, water and sediment entering the reservoir, and reservoir scheduling methods;

[0049] Step 2, establish a one-dimensional unsteady flow and sand mathematical model of Xiluodu, Xiangjiaba and Three Gorges cascade reservoirs;

[0050] Step 3. With the dam sites of each reservoir as the boundary, divide the calculation range of cascade reservoirs into three different calculation sections: Xiluodu Reservoir Area, Xiangjiaba Reservoir Area and Three Gorges Reservoir Area. It is treated as a single reservoir, and the main stream natural channel and inflow tributaries from the Xiangjiaba dam site to the end of the Three Gorges Reservoir are all included in the calculated river section of the Three Gorges Reservoir area;

[0051]Step 4. Taking ...

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Abstract

The invention discloses a synchronous combined calculation method for sediment scour and deposition of a cascade reservoir. The method comprises the steps of 1, collecting data of a riverway terrain of the cascade reservoir, inflow water and sediment, a reservoir regulation mode and the like; 2, building a one-dimensional non-constant running water and sediment mathematic model of the cascade reservoir; 3, dividing a calculation range of the cascade reservoir into different calculation river reaches by taking reservoir dam sites as boundaries, and processing non-constant running water and sediment calculation of each calculation river reach according to a single reservoir; 4, performing sediment scour and deposition calculation on reservoirs one by one in a same calculation step length, wherein a calculation sequence of the cascade reservoir is that the most downstream reservoir is calculated gradually from the most upstream reservoir; and 5, when a reservoir calculation result does not meet a constraint condition requirement at a moment in the step 4, returning to a previous calculation step length, adjusting the reservoir regulation mode and performing recalculation. According to the method, synchronous combined calculation of sediment scour and deposition of the cascade reservoir can be realized and technical support can be provided for water-sediment united operation of the cascade reservoir.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a method for synchronous joint calculation of sediment erosion and sedimentation in cascaded reservoirs. Background technique [0002] my country is rich in hydropower resources. With the rapid development of the national economy, the cascade development of many rivers has led to a sharp increase in the number of cascade reservoirs. Cascade reservoirs in various river basins have gradually formed. To consider the joint dispatch of water, the joint dispatch of sediment should also be considered. The sedimentation problem is one of the key factors affecting the long-term use and benefit of the reservoir. The sedimentation problem of cascaded reservoirs is more complicated. Carrying out the calculation and research of sedimentation and sedimentation in cascade reservoirs will help reveal the sedimentation law of cascade reservoirs and reflect the cascade. The i...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 黄仁勇
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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