Method for identifying river segment blocking performance characteristics and classifying blocking degrees

A technology of feature identification and classification method, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of unfavorable river section barrier degree variation law and understanding of the mechanism of action, cross-sectional shape width, limit theoretical research and practical application

CN108520132AActive Publication Date: 2018-09-11HUBEI PROVINCIAL WATER RESOURCES & HYDROPOWER PLANNING SURVEY & DESIGN INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-09-11

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Abstract

The invention belongs to the technical field of hydraulic engineering and discloses a method for identifying river segment blocking performance characteristics and classifying blocking degrees. The method comprises the steps that the continuous length of the cross sections, with the river facies coefficient smaller than 4, in blocking performance river segments is 3,200 m or above, and the standard deviations of the river facies coefficients of all the cross sections under different water levels are smaller than 15; the critical hanging length of upper-layer cohesive soil of river banks of theblocking performance river segments is not larger than the back-flushing distance of lower-layer sandy soil, the total stability of the bank slopes is high, and single-side or double-side large-rangeriver bank collapse cannot occur. For the transitional river segments converted from non-blocking performance to blocking performance, the regulation measures are adopted for removing the causes of damaging the blocking performance, and the effect of the blocking performance river segments is possibly created; for the transitional river segments converted from blocking performance to non-blockingperformance, the situation is avoided that the blocking performance is lost due to bad change; for long river segments among the non-blocking performance river segments, systematic planning and regulation are conducted from top to bottom for river regulation, and it is guaranteed that the upstream and downstream river regimes are smoothly connected; for the blocking performance river segments, the natural blocking performance of the river is prevented from being damaged by man-made engineering.
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Description

technical field

[0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a method for identifying and classifying barrier characteristics of river sections. Background technique

[0002] At present, the existing technologies commonly used in the industry are as follows: The Yangtze River is the largest river in my country and has a superior regional status. It is the only waterway transportation channel that runs through the east, middle and west of my country. How to carry out comprehensive and comprehensive management of the main stream section of the middle and lower reaches of the Yangtze River, so that the favorable river regime can be effectively controlled, the unfavorable river regime can be comprehensively improved, and a stable river regime and shoreline, smooth discharge, and excellent waterways, harbors, and water ecological environment can be formed. The river course is an urgent problem to be solved in ...

Examples

Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] Such as figure 1 As shown, the barrier characteristic identification and barrier degree classification method of the river section provided by the embodiment of the present invention includes the following steps:

[0037] S101: Based on the separation vortex at the head of spur dike and its induced flow velocity calculation method, analyze the influence of nodal deflection on flow velocity distribution at cut-off flow; based on mathematical statistics method, analyze the influence of fluvial facies coefficient variation along the course on barrier property, and reveal barrier river Node distribution characteristics...