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Method for constructing adjustment and prediction model for low-flow channel morphology of alluvial navigable channel

A prediction model and low-water technology, applied in construction, water conservancy engineering, water conservancy engineering equipment, etc., can solve the problem that the adjustment characteristics cannot represent the river section and so on.

Inactive Publication Date: 2017-10-24
WUHAN UNIV
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Problems solved by technology

However, when the shape of the channel varies greatly along the course, the adjustment characteristics of a specific section cannot represent the entire river section

Method used

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  • Method for constructing adjustment and prediction model for low-flow channel morphology of alluvial navigable channel
  • Method for constructing adjustment and prediction model for low-flow channel morphology of alluvial navigable channel
  • Method for constructing adjustment and prediction model for low-flow channel morphology of alluvial navigable channel

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Embodiment Construction

[0029] The solution technology of the present invention will be described in detail below in conjunction with the drawings and specific embodiments.

[0030] 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, (2) main stream water level and hydrological stations along the river section. The post-flood topographic data include the starting distance and elevation of the measuring points of the fixed section, and the spacing of the fixed section. The daily average hydrological data include flow data and water level data.

[0031] In this example, the above-mentioned Jingjiang River was used as the research river section, and the historical post-flood terrain data of 94 fixed sections from 2002 to 2015 were collected; at the same time, the water levels and hydrological stations of main streams such as Zhicheng, Majiadian, and ...

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Abstract

The invention discloses a method for constructing an adjustment and prediction model for the low-flow channel morphology of an alluvial navigable channel. The method comprises the steps that S1, historical post-flood topographic data of all fixed sections of a channel segment and historical average-daily hydrologic data of (1) a trunk stream water level and a hydrologic station and (2) a branch stream water level and hydrologic station along the channel segment are collected; S2, based on the historical post-flood topographic data of all the fixed sections, a one-dimensional hydrodynamic model is adopted to calculate the water level flow relation curve of all the fixed sections; S3, according to the low-flow flow of the channel segment, through the water level flow relation curve of the fixed sections, the low-flow levels of all the fixed sections are determined, and low-flow channel morphology parameters of all the fixed sections are obtained according to the low-flow levels; S4, low-flow channel morphology parameters of the channel segment are calculated; and S5, the adjustment and prediction model for the low-flow channel morphology of the large-scale alluvial navigable channel is constructed. The adjustment tendency of the low-flow channel morphology of the large-scale alluvial navigable channel along with the flow-sediment condition can be well predicted, and the guiding significance is achieved for treatment of the low-flow channel.

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 prediction model for the shape adjustment of alluvial navigable rivers and low-water channels. Background technique [0002] Both sides of large alluvial navigable rivers have developed industries and dense population, and are economically and socially developed areas in all countries in the world. However, the adjustment of alluvial channels and riverbeds is relatively drastic, so it is of great significance to study the evolution law of its navigation channel to ensure smooth navigation. Since most of the obstructions to navigation occur in the dry season, and the channel conditions are closely related to the dry channel, it is necessary to study the adjustment characteristics of the dry channel form of large alluvial navigable channels. [0003] Existing methods for studying the shape adjustment of w...

Claims

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Application Information

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IPC IPC(8): E02B1/00
CPCE02B1/00
Inventor 夏军强周美蓉邓珊珊林芬芬
Owner WUHAN UNIV
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