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

A technology of node control and undercutting, which is applied in the direction of river regulation and climate change adaptation, can solve the problems of easy leakage, inconvenient application, and increased economic costs, and achieve the effect of good water level

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
Publication Date
2014-02-19
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

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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Description

technical field

[0001] The invention relates to the technical field of water conservancy and water transport engineering, and especially aims at the prevention and control of water level drop during the scouring process of the downstream river bed of the reservoir, and proposes a positioning protection method for the key node river section that suppresses the water level drop. Background technique

[0002] River bed erosion is common in the lower reaches of the reservoir, and the downcut of the river bed caused a significant drop in the middle-low water level, resulting in a decrease in the water depth of the navigation channel and a decrease in the groundwater level on both sides of the reservoir, which is not conducive to shipping, coastal water intake, and industrial and agricultural production. It is an important means to reduce the hazards of water level drop by selecting key node positions that control the water level in the lower cut interval, and implementing protecti...

Examples

Embodiment Construction

[0028] According to the change rule of the relationship between water level and flow in the scouring section, and by means of a two-dimensional water flow mathematical model in the river channel plane, the present invention can more accurately locate the key node section where the deformation of the riverbed has a greater influence on the drop in water level, and determine the type of project to be adopted. Those skilled in the art can use computer software technology to realize automatic operation of the technical solution of the present invention. The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0029] There are two scouring and downcutting modes of side erosion and deep erosion in natural river channels, both of which cause the water level to drop, and the protective parts of the two node river sections should be different. The side erosion mainly occurs in the parts higher than the deep wa...