Method for calculating average peak flow rate of paroxysmal mud-rock flow and once total volume of mud-rock flow and application thereof

Abstract

The invention discloses a method for calculating a value of average peak flow rate of paroxysmal mud-rock flow and the once total volume of mud-rock flow and an application thereof. Aiming at solving the disadvantages of lower accuracy and practicability of the calculation of once total volume of the mud-rock flow and the shortage of method for calculating the average peak flow rate of the paroxysmal mud-rock flow in the prior art, the invention provides the method which utilizes field measured data for calculating the value of average peak flow rate of the paroxysmal mud-rock flow and the once total volume of the mud-rock flow. Based on the analysis result of all reliable observed data from 1987 to 2004 in China, the calculation method builds a model for calculating the value of the average peak flow rate of the paroxysmal mud-rock flow, and takes the calculation of the value of average peak flow rate of the paroxysmal mud-rock flow as a key step to build a model for calculating the once total volume of the paroxysmal mud-rock flow and the once total volume of mixed mud-rock flow. Compared with the prior art, the invention can accurately calculate the corresponding flow rate and the total volume index of the mud-rock flow by the field measurement and observation of the mud-rock flow, fills the gap in the research field, and is especially suitable for engineering application.

Description

technical field [0001] The invention relates to a calculation method for the average peak flow rate and a total amount of debris flow of a burst debris flow, in particular to a calculation method and application of the average peak flow rate and a total amount of a debris flow for an array debris flow based on field survey data. Background technique [0002] The primary total amount and average flow rate of debris flow are the most important characteristic parameters in the study of debris flow. They not only characterize the intensity, scale and nature of debris flow, but also serve as an important basis for judging the trend of debris flow. In the debris flow prevention project, the two parameters are the basis for determining the scale of the debris flow prevention project, and determine the type, structure and size of the debris flow prevention project building. [0003] Most of the existing debris flows are burst debris flows, and more than 99% of these debris flows can...

AI Technical Summary

Problems solved by technology

On the one hand, it is reflected in the fact that there are both flow time and flow stop time in the total time experienced by a debris flow. Field investigations of non-observed debris flows cannot accurately determine these two time parameters; on the other hand, a burst of debris flow The occurrence process includes several to thousands of bursts, and the flow rate of each burst of debris flow is not the same, and the field survey without observing the occurrence site of the debris flow can only determine the maximum value of the peak flow rate in each sequence

Therefore, there are difficulties in the accurate calculation of the average peak flow rate and the accurate calculation of the total amount in the study of burst debris flow

[0005] There are many reasons for the difficulty in the research on the method of determining the total and average flow of debris flows. In summary, there are the following points: (1) Since debris flows generally flow into the main river and are taken away by the main river, so in some There are very few cases of accurate debris flow surveyed and reported in the recorded literature; (2) It is usually very difficult to directly observe the process of debris flow (except in important places for debris flow research such as Jiangjiagou Watershed); (3) Debris flow During the movement process, its material capacity, characteristics, volume and other characteristic indicators continue to change; (4) In practice, the survey of most debris flows (except observed debris flows) can only provide the maximum flow rate and the time data of the total process of the debris flow, but cannot provide The average flow rate, flow time and cut-off time of bursty debris flow

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