Method for creating three-stage flow passage of meandering riverway in lower Yellow River

Abstract

The invention relates to a method for creating a three-stage flow passage of a meandering riverway in the lower Yellow River, of which the International Patent Classification (IPC) is E02B1 / 00 and E02B3 / 02. The method comprises the following steps of: constructing a control-guide engineering dam which comprises spur dikes made of waterproof earth-rock dams according to the radius of a river bend at the outermost side of a main design riverway; constructing a submerged dam at the chuting section at the tail part of the control-guide engineering dam, wherein the crest elevation is equal to the regulated-flow water level, and the top of the submerged dam is provided with a scour prevention facility; and distributing permeable pile dam at the two sides in a medium-size channel of a straight river section between two bends, wherein the crest elevation of the pile dam is the same as the water level with the local flow of 800m3 / s. The three-stage flow passage created by the method can control the river pattern flow passages in different states of the small-size flow passage, medium-size flow passage and flood period, realize the river stability, enhance the capabilities of releasing flood and transferring sands in the riverway, and prevent the Yellow River levee from avulsion, breakdown and other dangerous situations, thereby achieving the goal of the comprehensive treatment of the riverway in the lower Yellow River.

Description

Technical field: [0001] The present invention relates to a method of river regulation, and its IPC international patent classification numbers are E02B 1 / 00 ​​and E02B3 / 02, in particular to a third-class flow for the regulation of wandering rivers in the lower reaches of the Yellow River, which effectively controls the wandering range of the river. Road shaping method and shaping dam. Background technique: [0002] The river regulation plan for the lower reaches of the Yellow River was gradually formed during the practice of river regulation, and the slightly curved regulation plan is currently adopted. According to the law of river regime evolution and the requirements of various sectors of the national economy as a whole, the plan selects a basic flow path as the regulation flow path; constructs regulation works on the concave bank of the bend section to control and guide the flow direction of the river. This plan is called "slightly curved treatment plan" because the ben...

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Problems solved by technology

However, there are certain deficiencies in the slightly curved river regulation scheme. Since the river regulation project is designed according to the idea of ​​"reclaimed water regulation", the project layout is more adaptable to the reclaimed water flow path whose flow rate is near the regulation flow rate, but for the flow rate The existing project still has certain incompatibility for minor small floods or major floods; especially after the Xiaolangdi Reservoir is put into use, the downstream channel is at a height of 400-800m for about 300 days a year. 3 / s small water process, the duration of small water is greatly increased, and the inadaptability of the project to small water is more obvious, especially in the increase of deformed river bends, large changes in the project's slippery parts, or the loss of control of the river regime when the river is off. The abnormal river bend is extremely unfavorable to the flood control of the lower reaches of the Yellow River when the water is small.

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