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Debris flow gully identification method and device

A debris flow ditch and debris flow technology, applied in construction, design optimization/simulation, water conservancy engineering equipment, etc.

Active Publication Date: 2020-06-05
GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As we all know, the debris flow disaster is a system problem, and the debris flow system is an open dynamic system. The energy distribution and interaction results of the system directly determine whether the watershed is a debris flow ditch and the risk of the debris flow ditch. At present, the energy distribution of the debris flow system at home and abroad And there is no relevant research and discussion on the identification of debris flow ditch, and it is urgent to carry out relevant research

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  • Debris flow gully identification method and device
  • Debris flow gully identification method and device
  • Debris flow gully identification method and device

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Embodiment example

[0177] Shenxigou Watershed is located in Shenxi Village, Hongkou Township, Dujiangyan City, Sichuan Province, China. 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 ​​an earthquake. The earthquake caused serious surface ruptures in the waters...

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Abstract

The invention discloses a debris flow gully identification method and device, and the method comprises the steps: obtaining a special solution value of terrain subsystem information entropy accordingto a terrain subsystem information entropy model of debris flow; obtaining a special solution value of the information entropy of a solid matter source subsystem according to the information entropy model of the solid matter source subsystem of the debris flow; acquiring a special solution value of a hydrodynamic subsystem information entropy according to a hydrodynamic subsystem information entropy model of the debris flow; constructing an identification standard of a debris flow gully according to the obtained special solution value of the terrain subsystem information entropy, the obtainedspecial solution value of the solid matter source subsystem information entropy and the obtained special solution value of the hydrodynamic subsystem information entropy; and utilizing the identification standard of the debris flow gully to perform identification processing of the debris flow gully on the N sub-basins to be evaluated so as to determine whether each sub-basin is a debris flow gullyor a non-debris flow gully.

Description

technical field [0001] The invention relates to the technical field of natural disasters, in particular to a method and device for identifying debris flow ditch. 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. The primary task of debris flow prevention and control is the identification of debris flow gullies, which is also one of the hot spots in debris flow research. [0003] Generally speaking, a valley in a mountainous area can be judged as three results: ① a certain valley is an active debris flow ditch, ② a certain valley is a non-debris flow ditch, and ③ a certain ditch may be a debris flow ditch, that is, a potential debris flow ditch. At present, the debris flow ditch is identified mainly based on the historical activity remains of the debris flow and the field investigation of the formation c...

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Application Information

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IPC IPC(8): G06F30/20E02B1/00
CPCE02B1/00
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