Early warning method and device for debris flow
A technology of debris flow and subsystems, which is applied in the field of early warning methods and devices for debris flow, and can solve problems such as no relevant research, inability to meet debris flow early warning, and weakness.
Active Publication Date: 2021-04-20
GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI
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Problems solved by technology
Based on the fact that the current empirical method and frequency calculation method cannot meet the needs of debris flow early warning, Pan Huali et al. proposed a method to calculate the rainfall threshold for debris flow early warning based on the hydraulic debris flow starting mechanism by analyzing rainfall conditions, hydrological characteristics, and underlying surface conditions.
At present, this kind of research is still in its infancy and is still relatively weak. There is no relevant research and discussion on the energy distribution of debris flow system and its application in debris flow early warning at home and abroad, and relevant research is urgently needed
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[0176] The Shenxigou watershed is located in a certain place in China, and its geographical location is as follows: Figure 8 As shown, the total area of the basin is about 8.17km 2 , the main ditch is about 4400m long, the average slope is about 137‰, the highest altitude is about 2141m, the lowest altitude is about 870m, and the relative height difference is about 1271m. The basic conditions of the Shenxigou watershed, such as geology, topography, lithology, meteorology and hydrology, are shown in Table 1. Through ArcGIS10.1 software, using DEM data, the catchment grid threshold (accumulative flow) is 500 to extract the river network of the basin, and then the generated river network data is processed by Stream Link, and the watershed boundary is registered and drawn to obtain 41 sub-basins in the Shenxigou watershed, such as Figure 9 shown. The Shenxigou watershed is the hardest-hit area of a certain earthquake. The earthquake caused serious surface rupture in the w...
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The invention discloses a debris flow early warning method and device. The method comprises: obtaining the special solution value of the terrain subsystem information entropy according to the debris flow terrain subsystem information entropy model; according to the debris flow solid matter source subsystem information entropy model to obtain the special solution value of the information entropy of the solid material source subsystem; according to the hydrodynamic subsystem information entropy model of debris flow, obtain the special solution value of the information entropy of the hydrodynamic subsystem; The special solution value of the system information entropy, the special solution value of the information entropy of the solid material source subsystem and the special solution value of the information entropy of the hydrodynamic subsystem construct the early warning evaluation level of the debris flow; use the early warning of the debris flow Judgment level The N sub-watersheds to be judged are divided into debris flow early warning levels.
Description
technical field [0001] The invention relates to the technical field of natural disasters, in particular to a mud-rock flow early warning method and device. Background technique [0002] Debris flow is a common geological disaster in mountainous areas. Its outbreak is sudden, ferocious, short-lived, and has strong destructive and impact power. pose serious threats and hazards. Debris flow monitoring and early warning, as an economical, effective and advance prevention method, has attracted more and more attention from domestic and foreign scholars, disaster reduction scientific and technological workers and government departments. [0003] At present, there are two main methods for early warning of debris flow: [0004] (1) The debris flow early warning method based on statistical analysis is mainly based on the statistical analysis of the rainfall characteristics (such as previous rainfall, rainfall, rainfall intensity, rainfall duration, etc.) In 1972, Japanese scholar T...
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IPC IPC(8): G06Q10/04
CPCG06F17/18G06Q10/04G08B21/10
Inventor 王钧宇岩蒋冲袁少雄陈军宫清华黄光庆
Owner GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI