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Regional landslide disaster rainfall early warning method and early warning system

A rainfall and disaster technology, applied in the field of disaster early warning methods and systems, regional landslide disaster rainfall early warning methods and systems, and can solve problems such as increasing rainfall thresholds

Inactive Publication Date: 2019-03-26
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there is a certain degree of arbitrariness in drawing the lower envelope, and different mappers draw in different positions, which further increases the inadequacy of the rainfall threshold determined by the envelope

Method used

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  • Regional landslide disaster rainfall early warning method and early warning system
  • Regional landslide disaster rainfall early warning method and early warning system
  • Regional landslide disaster rainfall early warning method and early warning system

Examples

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Embodiment 1

[0069] The method of the invention is used to carry out early warning of landslide disasters under the condition of monitoring rainfall changes in Wanyuan City (research area) of Sichuan Province.

[0070] Selected rainfall monitoring sites. According to investigation and statistics, there are many automatic weather stations in Wanyuan City, but except for one station (National Basic Station, No. 57237, hereinafter referred to as Station 57237), the rest of the stations were established after 2007. In contrast, the rainfall data of station 57237 is complete, while the coverage period of rainfall data of other stations is relatively short, so station 57237 is selected as the rainfall monitoring station for landslide early warning in this embodiment.

[0071] According to the historical rainfall data of station 57237 and the landslide disaster records in Wanyuan City area, it is determined that more than 95% of landslide disasters in Wanyuan City area occur in the rainy season, ...

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Abstract

The invention discloses a regional landslide hazard rainfall early warning method and system. For overcoming the defects that in the prior art, according to a landslide hazard rainfall early warning threshold value determined by drawing a lower envelop line in a scatter diagram, the position of the lower envelop is random, and the threshold value is likely to be small, the regional landslide hazard rainfall early warning method comprises the steps that the region is within the landslide hazard early warning range, rainfall capacity data is monitored inside a disaster frequent-occurrence period, and when the rainfall capacity meets the early warning condition, corresponding landslide hazard early warning signals are given out. The rainfall capacity early warning conditions are composed of the judgment rainfall Rc and various levels of early warning threshold values, wherein Rc is a monitoring object in rainfall early warning, and Rc and the various levels of early warning threshold values are determined and obtained through a statistical analysis method on the basis of historic rainfall and landslide hazard data within the regional range. The invention further provides an early warning system utilizing the method. The method is reliable in principle, key rainfall capacity early warning conditions in the method can be obtained on the basis of regional hazard data, and the regional adaptability is high.

Description

technical field [0001] The invention relates to a disaster early warning method and system, in particular to a regional landslide disaster rainfall early warning method and system, belonging to the field of geological disaster prevention and control. Background technique [0002] Landslides are a common natural disaster in mountainous areas. When landslides occur, they often pose a huge threat to the safety of life and property of local people. Geological conditions and precipitation conditions are the two most important factors that cause landslides. Due to relatively stable geological conditions, landslide disasters often occur repeatedly for a given landslide disaster area. Moreover, for such a given landslide disaster area, precipitation conditions become the most important observation factor that triggers landslides. Then it is possible to use the precipitation data of meteorological forecast to predict the possibility of landslide occurrence, so as to carry out early...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B21/10G08B31/00
CPCG08B21/10G08B31/00
Inventor 杨红娟苏鹏程张少杰江玉红
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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