Method for judging groove debris flow occurring possibility at present and groove debris flow occurring possibility in future

A technique for mudslides and trenches, which is applied in the field of judging the occurrence of mudslides in trenches, and can solve the problem of large errors between judgment conclusions and actual conditions

Active Publication Date: 2013-11-27
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for judging whether the channel debris flow is currently occurring and whether it will occur in the future, mainly to solve the gap between the existing technical

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  • Method for judging groove debris flow occurring possibility at present and groove debris flow occurring possibility in future
  • Method for judging groove debris flow occurring possibility at present and groove debris flow occurring possibility in future
  • Method for judging groove debris flow occurring possibility at present and groove debris flow occurring possibility in future

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Embodiment

[0041] The present invention is mainly used for judging whether the debris flow in the ditch has occurred at the current moment and whether it will occur in the future, wherein the steps for judging whether the debris flow in the ditch at the current moment are as follows:

[0042] S1: Select the channel and use the formula Calculate the water level h in the channel when the debris flow starts s , where θ is the trench bed slope expressed in angle units, d m and are the average grain size and internal friction angle of the channel deposits, respectively, C * is the volume concentration of the accumulation body, ρ s is the gravel density, ρ w is the density of water; all parameters in this step can be measured by existing equipment or experimental means, for example, the slope of the ditch bed θ can be measured by a compass or a measuring rope, and the average particle size of the gravel in the ditch accumulation d m It can be obtained by measuring the gravel particle si...

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Abstract

The invention discloses a method for judging the groove debris flow occurring possibility at present and the groove debris flow occurring possibility in future. The method for judging the groove debris flow occurring possibility at present includes the steps of S1, selecting a groove, and using the formula (please refer to the specifications for the detailed formula) to calculate the hs, S2, using the formula to calculate the h0, and S3, comparing to judge whether the h0 is larger than or equal to the hs or not, issuing a debris flow alarm starting information if the h0 is larger than or equal to the hs, and being free of issuing the debris flow alarm starting information if the h0 is smaller than the hs. The method for judging the groove debris flow occurring possibility in future includes the steps of S1, selecting the groove, and using the formula to calculate the Q0', S2, using the formula to calculate the Q0, S3, using the formula to calculate the Cq, and using the formula to calculate the n, S4, using the forecast precipitation information issued by the meteorological department, and respectively obtaining P1, P2, P3...Pi, S5, using the formula to calculate the Qi, S6, solving S7, comparing to judge whether the Pi is larger than or equal to the P0 or not, and using the iteration method to determine the hi, and S8, comparing to judge whether the hi is larger than or equal to the hs or not, issuing the debris flow forecast starting information if the hi is larger than or equal to the hs, and being free of issuing the debris flow forecast starting information if the hi is smaller than the hs. The method is concise in technological process and accurate in judged conclusion.

Description

technical field [0001] The invention relates to a method for judging the occurrence of channel debris flow, in particular to a method for judging whether the channel debris flow is currently occurring and whether it will occur in the future. Background technique [0002] Debris flow, as a major natural disaster, seriously affects the economic development of mountainous areas, and threatens people's lives and property safety. At the same time, it also seriously threatens the sustainable development of society. [0003] At present, as an important means of disaster reduction, debris flow early warning has gradually attracted extensive attention from disaster reduction scientific and technological workers and relevant government management departments. The existing debris flow early warning mostly uses rainfall as the index to judge whether the debris flow occurs. However, there is no perfect theory and method to determine the direct relationship between the rainfall and the in...

Claims

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Application Information

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IPC IPC(8): G08B21/10
Inventor 姜元俊乔建平姜震王萌黄栋杨宗佶田宏岭孟华君
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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