A Method for Recognition of Reach's Barrier Characteristics and Classification of Barrier Degree

Abstract

The invention belongs to the technical field of water conservancy engineering, and discloses a method for identifying and classifying barrier characteristics of river sections. The continuous length of sections with river facies coefficients less than 4 in barrier river sections is at least 3200m, and the standard deviation of river facies coefficients of each section under different water levels Both are less than 15; the critical hanging length of the upper cohesive soil of the barrier river bank does not exceed the washback distance of the lower sandy soil, the overall stability of the bank slope is high, and large-scale bank collapse on one or both sides will not occur. For the transitional river section from non-blocking to non-blocking, take remediation measures to eliminate the reasons for damaging the barrier, which may create the effect of barrier river; for the transitional river section from barrier to non-blocking, prevent unfavorable changes from causing barrier For the long river sections between non-barrier river sections, the river course management should be systematically planned and improved from top to bottom to ensure the smooth connection of the upper and lower river regimes; for the barrier river sections, prevent artificial engineering from destroying the natural barrier properties of the river course .

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and particularly relates to a method for identifying the barrier properties of a river section and classifying the barrier degree. 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 major waterway transportation channel that runs through the east, middle and west of my country. How to comprehensively and comprehensively control the main reaches of the middle and lower reaches of the Yangtze River, so that the favorable river conditions can be effectively controlled, and the unfavorable river conditions can be comprehensively improved, so as to form stable river conditions and shorelines, smooth discharge, and excellent waterways, port areas, and water ecological environment. The river channel is an urgent prob...

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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