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Debris flow solid material start-up critical depth and maximum outflow calculation method, debris flow scale prediction method

A technology of solid matter and critical depth, which is applied in the field of geological disaster prevention technology and geological disaster monitoring and early warning, can solve the problems of large difference in measurement accuracy, insufficient scale estimation, limited application, etc., and achieve high reliability and wide applicability Effect

Active Publication Date: 2021-10-29
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

As a result, due to the differences in the study area, the measurement accuracy of various measurements varies greatly, and the universality of various measurement schemes is not high, and the application is obviously limited
And for the empirical model established based on existing samples, if the scale of debris flow exceeds the existing sample size, the estimation will be seriously insufficient
This further leads to the underestimation of the scale of the black swan-style debris disasters deviated from the normal by the existing calculation methods

Method used

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  • Debris flow solid material start-up critical depth and maximum outflow calculation method, debris flow scale prediction method
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  • Debris flow solid material start-up critical depth and maximum outflow calculation method, debris flow scale prediction method

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Embodiment 1

[0049] like figure 1 As shown in Figure 2, the method of the present invention is used to measure and calculate the relevant magnitudes in the debris flow caused by the rainfall event on July 26, 2013 in the Guoquanyan debris flow ditch in the Baisha River Basin, Dujiangyan City, Sichuan Province.

[0050] figure 1 It is a schematic diagram of the technical route of the calculation method for the start-up critical depth of debris flow solid matter.

[0051] 1. Carry out on-site investigation

[0052] The on-site investigation includes various surveying and mapping, measurement, and simulation experiment tests on the source area where the project is located, as well as the acquisition of historical disaster records, as well as the acquisition of empirical data that can be used for reference.

[0053] Guoquanyan Debris Flow Ditch is located about 10km north of Dujiangyan City. It is a branch ditch on the left bank of Shenxi Ditch and belongs to the Baisha River system. The de...

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Abstract

The invention discloses a method for measuring and calculating the starting critical depth of solid matter in mud-rock flow and the maximum flushing total amount, and a method for predicting the scale of mud-rock flow. Aiming at the defects in the existing technology that there are differences in the measurement accuracy of various measurement and calculation due to the difference in the research area, and that the universality of various measurement and calculation schemes is not high and the application is obviously limited, the present invention provides a measurement and calculation of the critical depth of the start-up of debris flow solid matter method and its application. According to the water source conditions and solid material conditions in the provenance area, it is judged that the start-up of debris flow in the provenance area belongs to the unsaturated seepage-runoff start-up mode, or the unsaturated seepage start-up mode, and then calculate the start-up critical depth. This method is a fully quantitative calculation method based on a dynamic model, which can specifically solve the defects that the existing technology is limited to a specific provenance area object and insufficient calculation of unexpected extreme debris flow disaster events that deviate from the constant value. The invention also provides a method for measuring and calculating the maximum total amount of mud-rock flow and its application, and a method for predicting the activity scale of mud-rock flow.

Description

technical field [0001] The present invention relates to a method for measuring and calculating the scale of mud-rock flow activities, in particular to a method for measuring the critical depth of solid matter that can be entrained when a mud-rock flow starts, a method for measuring and calculating the maximum amount of debris flow, and a method for predicting the scale of mud-rock flow activities based thereon. The invention belongs to the field of geological disaster prevention technology and geological disaster monitoring and early warning technology. Background technique [0002] The formation of debris flow is the result of the accumulation of solid matter in the source area of ​​debris flow with the water under the coupling effect of precipitation and topographical conditions. Under a precipitation condition, how much solid material can be activated under hydraulic conditions is an effective method to measure the scale of debris flow activities. This indicator can usua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00G01B21/00
CPCG01B21/00G01M10/00
Inventor 潘华利安笑欧国强李炳志吕娟孔玲蒋婷婷
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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