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

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.

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 ...

AI Technical Summary

Problems solved by technology

[0003] In summary, the problems in the prior art are: The mutual transformation process of the barrier and non-barrier river sections is not completed overnight, but a gradual transition. It can be seen that there should be intermediate links in the transformation process, and only two types of barrier and non-barrier river sections are studied. It is conducive to the in-depth understanding of the change law and mechanism of the barrier degree of the river section, but also limits the theoretical research and practical application of the river regime regulation method for the transitional river section between barrier and non-barrier

On the one hand, river sections with different degrees of barrier have different dominant controlling factors affecting their deep water swing. For some river sections with poor geological conditions on the riverbank, the material composition characteristics of the riverbank are the main controlling factors, such as the Nianziwan and Ma'anshan reaches; In some river sections with nodes at the entrance, the node deflection plays a decisive role in the process of deep water swing and river regime change for many years, such as Yangluo and Jiepai river sections; some sections are too wide and shallow, resulting in too wide space for deep water swings , such as Zhougong Dike, Shitouguan, Wuxue River Section

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