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Landslide hazard monitoring and early warning rainfall threshold judging method

A technology for monitoring, early warning, and judgment methods, which is applied in special data processing applications, instruments, electrical digital data processing, etc.

Inactive Publication Date: 2015-01-28
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Application Information

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Problems solved by technology

For example: ① The method of determining the critical value of rainfall by counting the amount of rainfall and the number of landslides is more suitable for early warning of rainfall and landslide trends in regional space, but not suitable for early warning of typical landslides (debris flow source bodies)
Moreover, this method relies heavily on the reliability of the source of statistical data, and the rainfall data in general areas are difficult to meet
② The method of determining the critical value of rainfall for early warning of the landslide failure mechanism is mostly based on the hydrological model of slope seepage, while ignoring the accelerated failure process of the structure caused by the change of the stress state during the seepage process of the slope, so it cannot be truly Reflect the impact of rainfall on landslides in the actual process
Most rainfall and landslide early warnings only focus on the possible damage results of landslides, but rarely analyze the macroscopic deformation of the ground surface in the early stage of real landslides, the time-series development of deformation and the correlation with the development of landslide deformation, so as to accurately judge whether landslides occur under rainfall conditions unstable

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  • Landslide hazard monitoring and early warning rainfall threshold judging method
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  • Landslide hazard monitoring and early warning rainfall threshold judging method

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Embodiment Construction

[0025] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0026] The method flowchart of this embodiment is as follows figure 1 shown, refer to figure 2 , image 3 and Figure 4 , the specific implementation method adopts the following technical scheme: In order to consider the influence of terrain conditions on the production and confluence, for the infiltration process, it is proposed to use the slope Green-Ampert equation, and the infiltration rate i and surface water h of the following equation , rainfall intensity p and slope θ are coupled to calculate, thus establishing the relationship between rainfall intensity-runoff-seepage ( Figure 2-4 ),which is:

[0027] ∂ h ∂ ...

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Abstract

The invention discloses a landslide hazard monitoring and early warning rainfall threshold judging method and relates to a method for calculating landslide critical value induced by rainfall. The landslide hazard monitoring and early warning rainfall threshold judging method includes setting up a damage geologic model for typical landslide types of the earthquake stricken area in the research direction of model test and rain-triggered landslide damage and deformation relevancy as early-warning critical value, and analyzing relevancy between rain-triggered landslide seepage and structural damage caused by stress field changes to obtain rainfall landslide early-warning critical reference value via indoor (outdoor) multi-model tests; monitoring and checking in real time via an outdoor landslide and mudslide remote-monitoring and early-warning system established by a project team, and finally providing the rainfall early-warning critical value. The defect of lack of research of deformation damage and formation mechanisms of the rainfall landslide (mudslide source) after earthquakes is overcome, basic subject theory for research of the geological disease monitoring and early-warning critical value is formed and provides scientific reference for policy making of the geological disaster monitoring and early warning.

Description

technical field [0001] The invention relates to a method for rainfall-induced landslide critical value, in particular to a method for judging the rainfall threshold for landslide disaster monitoring and early warning. Background technique [0002] After the Wenchuan Earthquake in 2008, under rainfall conditions, these loose accumulations induced tens of millions of resurrection-type collapses and landslides, and provided rich source conditions for debris flows, which contributed to the post-disaster reconstruction of the earthquake-stricken areas and the safety of people's lives and property. pose a great threat. At present, under the premise that the country cannot provide enough funds for engineering treatment of every landslide in the earthquake-stricken area, monitoring and early warning has become an important measure to reduce casualties and property losses. The remote real-time monitoring and early warning system for rainfall-type landslides is a modern support techn...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 黄栋乔建平李倩倩
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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