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A Calculation Method of Debris Flow Bulk Density Based on Spatiotemporal Evolution of Disaster

A calculation method, debris flow technology, applied in the direction of climate change adaptation, complex mathematical operations, etc., can solve problems such as large errors, and achieve the effects of reducing errors, optimizing structural design, and scientifically checking reliability

Active Publication Date: 2022-04-05
成都华建地质工程科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for calculating the bulk density of debris flows based on the temporal and spatial evolution of disasters, which solves the problem of large errors in the existing calculation methods for bulk density of debris flows, and can determine the bulk density of debris flows in different channel sections under different time and space conditions, effectively reducing the error

Method used

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  • A Calculation Method of Debris Flow Bulk Density Based on Spatiotemporal Evolution of Disaster
  • A Calculation Method of Debris Flow Bulk Density Based on Spatiotemporal Evolution of Disaster
  • A Calculation Method of Debris Flow Bulk Density Based on Spatiotemporal Evolution of Disaster

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Embodiment 1

[0061] In order to further elucidate the dynamic changes of the space-time scale of bulk density, the above-mentioned comprehensive determination method of bulk density was used to analyze the debris flow in Yongjiagou.

[0062] Yongjiagou watershed area S=5.12km 2 , relative height difference ΔH=1532m. Taking Mizoguchi section on August 18, 2012, the bulk density at P=20% rainstorm frequencyγ 0 =2.05g / cm 3 as a calculation basis. According to the survey in 2012, dynamic reserves V d =345×10 4 m 3 , static reserves V t =649.5×10 4 m 3 , according to the rainfall calculation formula to calculate the clean water flow Q of the debris flow obtained on August 18, 2012 0 =72.8m 3 / s.

[0063] The above rainfall calculation formula is:

[0064]

[0065] In the formula, Q p is the peak discharge of the storm with the frequency of P (m 3 / s); ψ is the peak runoff coefficient; F is the catchment area (Km 2 ); S is the rainstorm intensity (㎜ / h); i is the maximum rainsto...

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Abstract

The invention discloses a method for calculating the bulk density of debris flow based on the temporal and spatial evolution of disasters. The method (1) determines the reference value of the bulk density of debris flow; Reserves, watershed area, relative height difference of watershed, provenance characteristic parameters of the stage where the reference value is obtained and the stage to be calculated; (3) the adjustment coefficient of the provenance state obtained; (4) the stage where the reference value is obtained, and the stage to be calculated Based on the clear water flood peak flow rate corresponding to the rainfall frequency of the stage, the hydraulic condition adjustment coefficient under the rainfall frequency is obtained based on the clear water flood peak flow rate; (5) The debris flow density of the gully is obtained based on the provenance state adjustment coefficient and the hydraulic condition adjustment coefficient; ( 6) Obtain the debris flow bulk density of the cross-section through the scour-silting characteristics of the channel section, the dynamic volume of solid matter, and the characteristic parameters of the composition of solid matter particles.

Description

technical field [0001] The invention relates to a method for calculating the bulk density of debris flows, in particular to a method for calculating the bulk density of debris flows based on the temporal and spatial evolution of disasters. Background technique [0002] Debris flow is a multiphase fluid containing a large amount of sediment and rocks, and it is also a common geological disaster in mountainous areas. Therefore, the management of debris flow disasters is very important. At present, there are some deficiencies in the operation of the treatment project, such as: the damage of the sand control dam, the amount of outflow exceeding the design standard, and the overflow of the drainage channel. There are large errors in the calculation, which affect the disaster prevention benefits of the project and the calculation of the structural reliability, resulting in the destructive power of the debris flow disaster exceeding the disaster prevention capability of the projec...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/10
CPCG06F17/10Y02A10/40
Inventor 黄海杨东旭刘建康
Owner 成都华建地质工程科技有限公司
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