Riverbed deformation prediction method for strong turbulence area of riverway caused by engineering construction

A prediction method and riverbed technology, applied in the field of river dynamics in the discipline of water conservancy engineering, can solve the problems of complex evolution mechanism, large scour deformation range, inapplicability, etc., and achieve the effect of good calculation accuracy

Active Publication Date: 2020-02-14
NANJING HYDRAULIC RES INST
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Problems solved by technology

[0003] However, the deformation of the natural river bed is affected by incoming water and sediment and the constraint boundary, and the evolution mechanism is extremely complex. Accurately calculating the deformation value of the river bed is a huge challenge, especially in the local strong turbulent water area caused by the construction of the project. The range is large, the general calculation method cannot be applied, and there is no mature and reliable calculation method at present

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  • Riverbed deformation prediction method for strong turbulence area of riverway caused by engineering construction
  • Riverbed deformation prediction method for strong turbulence area of riverway caused by engineering construction
  • Riverbed deformation prediction method for strong turbulence area of riverway caused by engineering construction

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specific Embodiment 1

[0031] The invention proposes an effective new prediction method of riverbed deformation in the strong turbulence area of ​​the river channel caused by engineering construction, which can provide technical support for river channel management and protection.

[0032] The river bed deformation prediction method in the river channel strong turbulence area caused by engineering construction includes the following steps:

[0033] (1) Collect basic data such as river topography, constraint boundaries (including engineering construction), hydrological conditions (such as: flow change process, water level change process, flow velocity change process, incoming sediment process, etc.), river bed gradation, etc. .

[0034] (2) According to the basic data, the calculation grid of the calculation area channel is generated, and the mathematical model of the flow and sediment of the calculation area channel is established.

[0035] (3) According to the boundary conditions such as river wat...

specific Embodiment 2

[0044] combine figure 2 , the method for predicting the deformation of the riverbed in the river channel strong turbulence zone caused by engineering construction in the present invention comprises the following steps:

[0045] (1) Collect the basic data of a certain river channel where the riverbed deformation area needs to be calculated.

[0046] (2) According to the basic data, establish figure 2 The mathematical model of flow and sediment in the calculation range shown.

[0047] (3) Given the calculation boundary, the upstream flow rate is 100m 3 / s, the given water level in the downstream is 16m, based on the basic theory of water and sediment movement and the control equation, the mathematical model of water flow and sediment is used to calculate the turbulence intensity distribution of each grid node of the river channel, and the overall average turbulence intensity value of the river channel is calculated to be 0.012 m 2 / s 2 , and then calculate the local stron...

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Abstract

The invention discloses a riverbed deformation prediction method for a strong turbulence area of a river channel caused by engineering construction. The saturated sediment carrying force of the strongturbulence area is corrected by adopting the ratio lambda of the water flow turbulence intensity of each grid node of the strong turbulence area caused by engineering construction to the overall average turbulence intensity value of the river channel, so that the calculated riverbed deformation value better conforms to the actual situation, and the method has better calculation precision.

Description

technical field [0001] The invention relates to the technical field of river dynamics in the subject of hydraulic engineering, in particular to a riverbed deformation prediction method in a river channel strong turbulence area caused by engineering construction. Background technique [0002] Riverbed deformation is a common evolution phenomenon in natural rivers, which can have a significant impact on the safety of river flood control and water-related engineering. Accurate calculation of riverbed deformation is one of the key technical issues that must be solved for river management and protection. [0003] However, the deformation of the natural river bed is affected by incoming water and sediment and the constraint boundary, and the evolution mechanism is extremely complex. Accurately calculating the deformation value of the river bed is a huge challenge, especially in the local strong turbulent water area caused by the construction of the project. The range is large, and...

Claims

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Application Information

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IPC IPC(8): G06F30/13G06F30/20G06Q10/04G06Q50/08G06F111/10G06F119/04G06F119/14
CPCG06Q10/04G06Q50/08
Inventor 假冬冬何肖斌张培旭陈长英张幸农应强郝由之吴磊
Owner NANJING HYDRAULIC RES INST
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