An Adaptive Modeling Method of a Coupling Prediction Model for Gradual Collapse of a Barrier Lake

Abstract

The invention relates to an adaptive coupling prediction model for gradual collapse of a dammed lake, which is characterized in that it comprises the following steps: fitting the water level-storage capacity curve of the dammed lake, and obtaining the total water volume W of the reservoir area before the dam breaks 0 ;Estimated breach width b m and deep h m ;Calculate the maximum flow rate of the dam break at the dam site section to obtain the break depth h m Corresponding storage capacity W m ;Calculate the average volumetric sand content percentage ρ;Calculate the maximum water depth ratio at the dam break β m ;Calculate the uplift duration τ;Calculate the real-time dam break flow process q (t) , to calculate the water discharge W (τ) ; check whether it is within the acceptable range; calculate the time T after the peak of the dam break flood; calculate the flow process after the peak; calculate the residual water volume W in front of the dam (T) ; Check whether it is within the acceptable range; integrate the flow process q before and after the peak (t) , The present invention can not only obtain the maximum possible flood peak flow, but also calculate the dam break flood process together, realize the rapid acquisition of the dam break flood flow process, and provide reference for front-line emergency rescue treatment.

Description

technical field [0001] The invention belongs to the interdisciplinary fields of hydrology and hydraulics calculation, and in particular relates to an adaptive coupling prediction model for the gradual collapse of a barrier lake, which is used for deriving the flow process of the flood flow of the barrier lake. Background technique [0002] Scholars at home and abroad have carried out a lot of dam break flood research work, and have proposed a series of dam break models, most of which are calculated and estimated by the gradual collapse model of earth-rock dams. Based on the water-sand theory, Xie Renzhi proposed a unified formula for the maximum peak flow of dam breaks , and analyzed the process of instantaneous collapse and gradual dam collapse, and some scholars conducted quantitative comparisons on the characteristics of the calculation formula of the breach flow and the key factors in the formula, and also summarized and compared the existing models. [0003] Xie Renzhi’...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an adaptive coupling prediction model for the gradual collapse of a barrier lake in view of the difficulty in confirming the erosion parameters of the breach in the prior art and the inconvenience caused to the estimation of the formation process of the dam collapse

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