Control node locating protecting method of undercutting channel segment water level lowering amplitude

By dividing the lateral erosion and deep erosion intervals, establishing a two-dimensional mathematical model of water flow, determining node types and arranging protection projects, the problem of water level control in river bed erosion downstream of the reservoir was solved, the protection efficiency and effect were improved, and the cost was reduced.

CN103590363AInactive Publication Date: 2014-02-19WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV
Filing Date
2013-11-26
Publication Date
2014-02-19
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing technology makes it difficult to effectively select key node sections that have a greater impact on water level control during river bed erosion downstream of the reservoir, resulting in low efficiency and high cost of river protection projects, and it is easy to miss or incorrectly select key nodes.

Method used

By dividing the lateral corrosion interval and the deep erosion interval, a two-dimensional mathematical model of water flow is established to determine the type of each node, and arrange protection projects at corresponding locations according to the node type, such as latent lock dams, beach protection belts or bottom protection belts, to optimize protection The layout area and width of the project.

Benefits of technology

It achieves better control of the water level of the incised river downstream of the reservoir, improves the efficiency and effectiveness of the protection project, reduces economic costs, and ensures precise positioning and targeted protection of key nodes.

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Abstract

The invention provides a control node locating protecting method of undercutting channel segment water level lowering amplitude. The method comprises the steps that a lateral erosion zone and a deep erosion zone are divided; a target channel section is subjected to meshing, a plane two-dimension water flow mathematic model is established, parameter calibration and verification are carried out; a protection project is generalized to the plane two-dimension water flow mathematic model, the arranging zone and the width of the protecting project are determined; local gradient amplification and upstream water level amplification corresponding to each working condition are obtained, mesh sequences are analyzed respectively; key nodes or other nodes which have obvious influence are selected, for lateral erosion nodes, a hidden closure dam and a beach protection part are arranged on a river branch or a bottomland, and for deep erosion nodes, a bottom protecting band or a hidden closure dam are placed in a main groove. According to the method, nodes are divided into the lateral erosion nodes and the deep erosion nodes, protection part difference of the nodes in different types is provided, by comparing the efficiency of a local channel segment arranging protecting project, the positions of the nodes are accurately located, and the optimum efficiency of the protecting project is guaranteed powerfully.
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