Reservoir area ice dam damming simulation method based on simplified Shengvian equation set

Abstract

The invention discloses a reservoir area ice dam damming simulation method based on a simplified Saint-Venant equation set. The reservoir area ice dam damming simulation method comprises the steps: S1, determining an ice dam forming period; s2, determining the occurrence position of the ice dam; s3, determining a reservoir capacity curve required by ice dam damming calculation; s4, calculating thewarehousing ice amount and the geometrical morphology; s5, determining a discharge curve required by ice dam damming calculation; for different flow levels, considering the water blocking area of theice dam to obtain the ice-water mixing area under the flow, and back calculating the water level according to the section form to obtain the flow relationship of the water level or the ice level, namely the discharge curve of the section; and S6, performing ice dam flood regulation calculation based on the simplified Saint-Venant equation set. According to the method, under the condition of limited data, the problem that the ice dam occurrence position depends on actual measurement data is solved by utilizing the incidence relation between the reservoir area water level in front of the dam and the reservoir tail ice dam occurrence position and judgment indexes. The section discharge capacity of the head section of the ice dam is analyzed through section hydraulic factors, and the problemof section ice passing capacity determination is solved.

Description

technical field [0001] The invention relates to the technical field of reservoir flood control and disaster reduction, in particular to a method for simulating backwater of an ice dam in a reservoir area based on simplified Saint-Venant equations. Background technique [0002] In the northern river basin area, ice floods occur frequently, often causing very serious disasters, endangering the safety of life and property, and affecting social and economic development. Among them, ice dams, as a special manifestation of ice disasters, widely exist in cold rivers in winter, and significantly raise the upstream water level, becoming the hidden danger of winter ice floods and the focus of ice prevention. At present, in actual ice prevention work, it is often necessary to estimate the backwater situation of ice dams through mathematical simulation methods to provide technical support for the early prevention and control of ice floods. [0003] The literature survey shows that due ...

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Problems solved by technology

[0004] The object of the present invention is to provide a simulation method of ice dam backwater in reservoir area based on simplified St. Water prevention and control issues, improve the ability to deal with ice flood disasters

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