Method of determining stage-discharge relation in convergent area of main and branch waterways

A technology for determining relationships and converging areas, applied in water conservancy projects, water conservancy engineering equipment, buildings, etc., can solve problems that cannot meet engineering practice, low precision, and poor operability

Inactive Publication Date: 2015-10-28
WUHAN UNIV
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Problems solved by technology

These methods are empirical, poor in operability, and low in accuracy
Especially after the construction of reservoirs in main streams or tributaries, the flow process is regulated by the reservoir, and the river topography also scouring and silting. It is more difficult to quantitatively calculate the water level under changing conditions by relying on past experience methods, which cannot meet the needs of engineering practice.

Method used

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  • Method of determining stage-discharge relation in convergent area of main and branch waterways
  • Method of determining stage-discharge relation in convergent area of main and branch waterways
  • Method of determining stage-discharge relation in convergent area of main and branch waterways

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Embodiment 1

[0051] see figure 1 , figure 2 , the embodiment of the present invention is a certain main-branch intersection area, the target section is the hydrological station A at 82km upstream of the confluence point, and there is a hydrological station B immediately downstream of the confluence point. According to the actual distribution of hydrological stations, follow the steps below to determine the relationship between the water level and flow at station A in the influence area of ​​the junction of main and tributary streams:

[0052] Step 1: Evaluation of the jacking strength of the junction of main and tributary streams to the water level of the target section.

[0053] The purpose of evaluating the strength of the water level of the target section under the jacking action of the main and tributary streams is to determine whether it is necessary to consider the multi-valued water level of the main and tributary streams in the vicinity of the target section.

[0054] In the emb...

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Abstract

The invention provides a method of determining a stage-discharge relation in a convergent area of main and branch waterways. The method comprises steps of estimating the jacking strength of convergent of main and branch waterways on a target section stage, determining a stage-discharge function relation under influences of jacking effects, solving a stage-discharge function equation under the influences of jacking effects, and drawing multivalued stage-discharge relation curve groups. Compared with the existing experience method, the stage-discharge relation in the convergent area of main and branch waterways deduced according to the river hydraulics principle has an explicit physical meaning, stage-discharge dimensional relations between main and branch waterways can be accurately reflected, the calculation precision is higher, stage-discharge relation curve groups in different main and branch waterway combinations can be given in a detailed and thorough mode, and a convenient way is provided for stage estimation for the convergent area of main and branch waterways.

Description

technical field [0001] The invention relates to the technical field of water conservancy and water transport engineering, in particular to a method for determining the relationship between water level and flow in the intersection area of ​​main and tributary streams. Background technique [0002] The graphical curve or mathematical expression of the relationship between water level and discharge of a specific hydrological section in a river is the main basis for estimating the water level in a river under different inflow conditions, and is widely used in flood control design water level, navigable low water level, and wading engineering design. In a single channel that is not affected by tributary inflows and inflows, the relationship between water level and flow is relatively stable. At present, there are many mature methods. It presents a very obvious multi-value, and the determination method of the water level and flow relationship of a single channel cannot be applied. ...

Claims

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Application Information

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IPC IPC(8): G06F19/00E02B1/00
Inventor 孙昭华李奇韩剑桥严鑫
Owner WUHAN UNIV
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