Method for calculating appropriate sealed river volume of riverway in ice flood season based on flat beach flow

Abstract

The invention discloses a method for calculating the appropriate sealed river volume of a riverway in the ice flood season based on the flat beach flow. The method comprises the steps of obtaining original data; calculating the over-the-year flat beach flow of the river reach to obtain the over-the-year flat beach flow change trend of the river reach; obtaining the actual sealed river volume over the years and the actual measured flow in the stable sealing period of the river reach; establishing a relationship between the non-accident river sealing amount and the flat beach flow; establishing a relationship between the accident river sealing quantity and the flat beach flow; obtaining the upper limit value of the river reach river sealing volume; obtaining the relationship among the water resource utilization demand in the river reach, the river sealing amount and the actually measured flow in the stable sealing period; the Froude number Fr of the stable sealing period of the river reach over the years is calculated, and the relation between the Froude number of the river reach over the years and the actually measured flow of the stable sealing period is established; and according to the relationship between the Froude number and the actually measured flow in the stable sealing period, determining the suitable flow sealing flow for avoiding the occurrence of ice blockage by combining the obtained data relationship. The method has the advantage of solving the key technical problems that the river sealing amount of the riverway is difficult to determine in the ice flood season and the ice prevention situation cannot be controlled.

Description

technical field [0001] The invention relates to the technical field of anti-icing regulation of ice-flooded rivers, in particular to a method for calculating the flow rate suitable for river closure during the ice-flood season based on flat beach flow. Background technique [0002] The threat of ice floods on the Yellow River is a long-term and difficult to solve worldwide problem, known as "the ice flood breaches, the river officials are not guilty". The sections of the Yellow River in Ningxia, Inner Mongolia, and Shandong flow from low latitudes to high latitudes. The temporal and spatial sequences of the river closures in winter and spring are inconsistent. In addition, the morphological characteristics of the rivers are complex and changeable, and ice dams are easily formed, causing serious ice flood disasters. Due to the complex disaster-pregnant environment, strong burst chains, and difficulty in prevention and control, the Yellow River icicle disaster is the most prom...

AI Technical Summary

Problems solved by technology

This method is mainly based on the demand for water resource scheduling in non-flood seasons, and the analysis of the impact of changes in the boundary conditions of alluvial rivers (such as flat beach flow) on the flow of closed rivers is insufficient and scientific.

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