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Rainstorm debris flow early warning method under shortage conditions of historical data

A technology of historical data and debris flow, applied in the direction of alarms, instruments, etc., can solve the problem of difficult and effective early warning of debris flow

Inactive Publication Date: 2015-01-28
SICHUAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for early warning of rainstorm debris flow under the condition of shortage of historical data, aiming at solving the problem that it is difficult to realize effective early warning of debris flow in the prior art

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  • Rainstorm debris flow early warning method under shortage conditions of historical data
  • Rainstorm debris flow early warning method under shortage conditions of historical data
  • Rainstorm debris flow early warning method under shortage conditions of historical data

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[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] A rainstorm and debris flow early warning method under the condition of shortage of historical data, such as figure 1 shown, including the following steps:

[0019] S1. Obtain the normalized diffusion value of the obtained rainfall observation data after information diffusion.

[0020] Existing studies have shown that the occurrence of torrential rain-type debris flows is the result of the joint action of on-site precipitation and previous precipitation. Here, the most representative and most influential four precipitation factors are selected as rainfall conditions, namely, previous rainfa...

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Abstract

The invention provides a rainstorm debris flow early warning method under shortage conditions of historical data. The rainstorm debris flow early warning method under the shortage conditions of the historical data includes steps: obtaining enriched sample information by using a sample point as a representative of a surrounding information gap and diffusing information of the sample point around; building a relationship between rainfall conditions and debris flow eruption by using the sample information after being enriched in combination with a BP neural network, and thereby achieving effective debris flow early warning finally. The rainstorm debris flow early warning method under the shortage conditions of the historical data is used for the debris flow early warning in areas short of the historical data, can significantly improve early warning accuracy and reliability, conveniently collects related rainfall data, and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of disaster early warning, and in particular relates to a rainstorm debris flow early warning method under the condition of shortage of historical data. Background technique [0002] my country is one of the countries most severely affected by mudslide disasters. Among them, the debris flow triggered by heavy rain is called rainstorm debris flow, which is the most common and most frequent type of debris flow. Especially in the mountainous areas of western my country, there are hundreds of debris flows in thousands of ditches every year during the rainy season, resulting in The direct economic loss is as high as more than 2 billion yuan. Therefore, in-depth research on the prediction and forecasting technology of rainstorm-type debris flow has great significance for improving the prevention ability of debris flow disasters and minimizing casualties and economic losses. [0003] The occurrence of rainstorm de...

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Application Information

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IPC IPC(8): G08B21/10
CPCG08B21/10
Inventor 李天翼袁培根杨东艳胡西尧
Owner SICHUAN UNIV
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