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Construction method of flat shoal flow prediction model based on joint control of upstream-downstream borders over lower reach

A common control and flow prediction technology, applied in the direction of instrumentation, design optimization/simulation, calculation, etc., to achieve the effect of good flow capacity

Active Publication Date: 2017-05-17
WUHAN UNIV
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Problems solved by technology

In addition, this type of method usually only considers the influence of upstream boundary conditions on the adjustment of flat-flat flow, and is not suitable for river sections with large fluctuations in downstream water levels. predictive model

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  • Construction method of flat shoal flow prediction model based on joint control of upstream-downstream borders over lower reach
  • Construction method of flat shoal flow prediction model based on joint control of upstream-downstream borders over lower reach
  • Construction method of flat shoal flow prediction model based on joint control of upstream-downstream borders over lower reach

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Embodiment Construction

[0051] The present invention provides a method for constructing a flat-shoal flow forecasting model under joint control of upstream and downstream boundaries. The scheme technology of the present invention will be described in detail below in conjunction with the accompanying drawings and examples. Specifically include the following steps:

[0052] S1 collects the historical post-flood topographic data of each fixed section of the river section, and the historical daily average hydrological data of ① main stream water level and hydrological stations and ② tributary water levels and hydrological stations along the river section. Among them, post-flood topographic data include the starting distance and elevation of fixed section measuring points, and fixed section spacing; daily average hydrological data include flow, sediment concentration and water level data. Taking Jingjiang River as the research section, the entrance is Zhicheng Station, and the exit is Lianhuatang Station,...

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Abstract

The invention discloses a construction method of a flat shoal flow prediction model based on joint control of upstream-downstream borders over a lower reach. The construction method specifically comprises the steps of adopting a one-dimensional hydrodynamic model to calculate and study a water level-flow relation curve of each fixed section in the reach; determining flat shoal flow in each section according to flat shoal elevation in each fixed section; adopting a method based on the combination of geometric average of logarithmic transformation and weighted average of section spacing to calculate the flat shoal flow of reach dimension; analyzing a response relationship of the flat shoal flow adjustment on an upstream water-sediment condition and downstream water level change, and constructing the prediction model based on joint control of the upstream-downstream borders over the lower reach. According to the construction method of the flat shoal flow prediction model based on joint control of the upstream-downstream borders over the lower reach, the calculated and obtained flat shoal flow of reach dimension is capable of better describing the flow passing capacity of the whole reach, and thus the flat shoal flow is more representative; the constructed flat shoal flow prediction model is capable of well reflecting the variation trend of the flat shoal flow along with the upstream water-sediment condition when the downstream water level changes sharply, and thus the constructed flat shoal flow prediction model has a guidance significance in the flood prevention and riverway management.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering, and in particular relates to a method for constructing a flat beach flow prediction model of a river section under the common control of upstream and downstream boundaries. Background technique [0002] Flatland flow refers to the flow that passes through a specific section when the water level is equal to the floodplain, and its adjustment changes are closely related to the upstream and downstream boundary conditions. Flat flat flow is one of the important parameters in flood control design, and it is also an important index to measure the flow capacity of the river and the ability of water flow to create a bed. Therefore, it is necessary to study the adjustment characteristics of flat flat flow in the river section under the joint control of the upstream and downstream boundaries. [0003] The researches on flat discharge at home and abroad mainly include th...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02A10/40
Inventor 夏军强周美蓉李洁邓珊珊林芬芬
Owner WUHAN UNIV
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