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Tree-shaped river network cascade reservoir hydrodynamic water quality sediment coupling simulation method and system

A cascaded reservoir and simulation method technology, applied in the field of water conservancy research, can solve problems such as the inapplicability of Saint-Venant's equations, the loss of hydraulic connections between the upstream and downstream of the dam, and the inability to perform overall coherent calculations on the river network, so as to achieve rich research methods, Simultaneous real-time simulation and calculated effects

Active Publication Date: 2019-07-09
PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION +1
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been studies based on the flood characteristic results of the measured hydrological data in flood and dry seasons and the Muskingum method to calculate the operation of cascade reservoirs. However, the calculation of the traditional one-dimensional mathematical model results in the upstream and downstream of the dam being cut off by the dam of the reservoir. Losing the hydraulic connection, Saint-Venant's equations cannot be applied, resulting in the failure of the overall coherent calculation of the river network

Method used

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  • Tree-shaped river network cascade reservoir hydrodynamic water quality sediment coupling simulation method and system
  • Tree-shaped river network cascade reservoir hydrodynamic water quality sediment coupling simulation method and system
  • Tree-shaped river network cascade reservoir hydrodynamic water quality sediment coupling simulation method and system

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Embodiment 1

[0049] This embodiment discloses such as figure 1 A method for coupling simulation of hydrodynamics, water quality, and sediment of cascade reservoirs in a dendritic river network includes the following steps:

[0050] According to the distribution of cascade reservoirs in the tree-like river network, S1 is divided to obtain the control nodes of the river network;

[0051] S2 classifies the control nodes of the river network;

[0052] S3 compiles the program to calculate the control nodes to realize the joint solution of the river network and cascade reservoirs;

[0053] S4 realizes synchronous real-time simulation and calculation through the overall hydrodynamic simulation and calculation platform of the river network.

[0054] In S1, according to the distribution of cascade reservoirs in the tree-shaped river network, the section where each reservoir dam is located is used as the control element to divide the whole river network, and the sub-river network is separated, and t...

Embodiment 2

[0060] This embodiment discloses that the one-dimensional Saint-Venant equation includes the water flow continuity equation and the water flow motion equation;

[0061] The flow continuity equation is:

[0062] The equation of motion of the water flow is:

[0063]

[0064] In the formula, s is the process coordinate, unit m; Q is flow rate, unit m3 / s; Z is water level, unit m; g is gravity acceleration, unit m / s2; t is time, unit s; The unit is m2; R is the hydraulic radius, the unit is m; n is the channel roughness coefficient.

[0065] Preferably, the one-dimensional Saint-Venant equations are discretized using the Preissmann four-point implicit difference scheme, and finally simplified to:

[0066]

[0067]

[0068] Discrete equations (3) and (4) are the relational expressions of water level and flow between two adjacent sections numbered i and i+1, which are internal section equations, and a1i, c1i, e1i, a2i, c2i, d2i and e2i are implicit There are coefficien...

Embodiment 3

[0073] This embodiment discloses a hydrodynamic, water quality, and sediment coupling simulation system for cascade reservoirs in a tree-shaped river network. The calculation software of the system is written in fortran language, and includes a main program module, a boundary file module, a calculation module, a sediment module and temperature module.

[0074] Such as image 3 In the calculation of the main program module shown, first read in the topological information data of the river network and the section geometric information data of each river section, and assign initial values ​​to each section and water level; at this time, read in the water level and flow area of ​​each section , the corresponding relationship between the water surface width and the wetted perimeter, and the corresponding relationship between each flow rate and the roughness, and calculate the initial values ​​of the flow area, water surface, wetted perimeter and flow velocity of each section, and a...

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Abstract

The invention relates to the technical field of water conservancy research, in particular to a tree-shaped river network cascade reservoir hydrodynamic water quality and sediment coupling simulation method and system, and aims to solve the problem of integrity and reliability of river channel terrain sections and control line hydrological station data. After the cascade reservoirs are added, how to solve the problem of joint solution of the river network and the cascade reservoirs is solved, and a Western River midstream river network overall hydrodynamic simulation calculation platform integrating a cascade reservoir scheduling mode and a one-dimensional river network hydrodynamic model is established by relying on latest actually-measured water depth topographic data of the main and branch river channels. Model calculation is based on a one-dimensional Cherry View South Range. a calculation sequence for establishing a model from four levels of a river network, a sub-river network, ariver channel and nodes is provided. The river network and the cascade reservoirs are generalized. The river network and the cascade reservoirs are connected into a whole through the transmission relation of the water conservancy project scheduling mode and the external boundary conditions. All river segments are connected into a calculation whole, synchronous real-time simulation and calculationare achieved, and the research means of river network cascade reservoir scheduling is enriched.

Description

technical field [0001] The invention relates to the technical field of water conservancy research, in particular to a hydrodynamic, water quality, and sediment coupling simulation method and system for tree-shaped river network cascade reservoirs. Background technique [0002] The inland river network in the middle and upper reaches of China is mainly in a tree shape. A large number of cascade reservoirs have been built on the main and tributary rivers for flood control, power generation, water supply, irrigation, shipping and other purposes. It is extremely important to carry out scientific and reasonable dispatching and operation of cascade reservoirs. At present, there have been studies based on the flood characteristic results of the measured hydrological data in flood and dry seasons and the Muskingum method to calculate the operation of cascade reservoirs. However, the calculation of the traditional one-dimensional mathematical model results in the upstream and downstre...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02A20/152
Inventor 方神光崔丽琴蓝霄峰
Owner PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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