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
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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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