Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Channel-started debris flow occurrence pre-warning method and application

A debris flow and channel technology, applied in the field of water conservancy engineering and debris flow prevention and control engineering, can solve problems such as loss of personnel, casualties, etc.

Active Publication Date: 2013-12-25
CHENGDU UNIVERSITY OF TECHNOLOGY
View PDF1 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for low-frequency debris flows, there is often no accumulation of observation data, so it is impossible to obtain an empirical method for the critical rainfall value based on the observation data, thereby predicting the occurrence of debris flows
The occurrence of such low-frequency debris flows often causes heavy losses and casualties.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Channel-started debris flow occurrence pre-warning method and application
  • Channel-started debris flow occurrence pre-warning method and application
  • Channel-started debris flow occurrence pre-warning method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] figure 1 It is a schematic diagram of the technical process. The method of the invention is used to carry out early warning of debris flow initiation in Sanyanyugou and Luojiayugou two debris flow channels.

[0097] The county seat of Zhouqu County, Gansu Province is built on the accumulation fan of Sanyanyugou and Luojiayugou. Sanyanyugou has branch ditches Dayanyugou and Xiaoyanyugou, and Bigyanyugou is its main ditch. Its watershed parameters are more conducive to the formation of debris flow than those of Xiaoyanyugou, so Bigyanyugou is used The formation area of ​​debris flow in this area is used as the early warning and monitoring area of ​​Sanyanyugou. Investigate surveying and mapping and inquire local hydrological manuals to determine the following basic parameter data of the Sanyanyu Valley and Luojiayu Valley debris flow formation areas:

[0098] Sanyan Valley: J=0.314, A 0 =8.68km 2 , L=4.11km, R 0 =435.8mm, C v =0.73; Luojiayugou: J=0.261, A 0 =10.1...

Embodiment 2

[0104] image 3 It is a schematic diagram of the technical process. The method of the invention is used to implement early warning of debris flow start-up in the Aizigou debris flow channel of Baihetan Hydropower Station in Sichuan.

[0105] The following basic parameter data of the Aizigou debris flow formation area are determined through surveying, surveying, and local hydrological manuals: J=0.29, A 0 =9.18km 2 , L=4.28km, R 0 =769mm, C v =0.3.

[0106] The above basic parameter data J, A 0 and L are respectively substituted into formula 2 and formula 3, and the calculation determines that F=0.501 and A=9.18.

[0107] After investigation, the formation area of ​​the Aizigou debris flow is basalt, siltstone interbedded with thin mudstone, and there are two fault zones passing through the formation area. The local seismic intensity is VIII, the annual average temperature is 9.1°C, and the average rainfall is 769mm. Salt rock, compare Table 1, Table 2, Table 3 and fig...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a debris flow pre-warning method. In view of the shortcoming that the channel-started debris flow critical rainfall threshold calculation method in the prior art needs to be based on long-term debris flow observation data, the invention provides a debris flow pre-warning method. The core of the method is a debris flow start critical value Cr calculation method expressed by debris flow channel topography, geology, and a hydrological factor. According to the method, the Cr value of a pre-warning monitored area is used as a monitored value, and debris flow pre-warning levels are set according to the magnitudes of monitored values; when Cr is less than 0.35, the condition is green and safe; when Cr is larger than or equal to 0.35 and less than or equal to 0.47, a debris flow orange pre-warning is issued; and when Cr is larger than or equal to 0.47, a debris flow red pre-warning is issued. In optimized condition, the rainfall amount of 1h is used as a common monitored value at the same time. The invention also provides a debris flow pre-warning method with an equivalent rainfall R* value as a main monitored value. The method has a reliable principle, the threshold calculation more conforms to debris flow forming mechanism; the threshold calculation is not based on long-term observation data, and has better disaster preventing applicability.

Description

technical field [0001] The invention relates to a mud-rock flow early-warning method, in particular to a mud-rock flow early-warning method and application thereof, belonging to the fields of mud-rock flow prevention and control engineering and water conservancy engineering. Background technique [0002] A channel is a steeply sloping water collection channel that is washed by intermittent floods. After the slope runoff is generated, along the slope direction, with the continuous increase of rainfall runoff accumulation, a flash flood with large single-width discharge and flow velocity is formed. Channel erosion refers to the erosion form in which the slope runoff concentrates on the soil and parent rock and cuts into the ground to form a large gully. Loose solids are abundant in the trenches. When the loose solids are tilted or bottomed out due to climate, environment, and hydrological influences, debris flows will start. This type of debris flow is called channel erosion ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G08B21/10
Inventor 余斌朱渊王涛陈源井
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com