Debris flow mechanical parameter monitoring system and debris flow early warning system
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A technology of monitoring system and mechanical parameters, applied in disaster monitoring and debris flow prevention and control engineering fields, can solve problems such as not considering the process of coupling to form debris flow, and unable to answer
Active Publication Date: 2014-10-22
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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This kind of method only considers the link of soil damage in the formation of debris flow, and does not consider the process of coupling the damaged soil and surface
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Embodiment 1
[0100] like Figure 1-1 to Figure 1-6 As shown, a debris flow mechanical parameter monitoring system.
[0101] Step S1, layout monitoring section D
[0102] Picture 1-1 is the elevation map of the debris flow channel; Figure 1-2 It is a schematic diagram of the location of the monitoring section D. In the flow area of the debris flow channel, the monitoring section D is selected at a position where the shape of the channel cross section is regular, the change of channel erosion and silting is small, the channel bed is straight, and the bank slopes on both sides are high and steep.
[0103] Step S2, investigate and determine the background parameters
[0104] On-site investigation to determine the slope I where the monitoring section D is located C =14.1%, monitoring section D width B=30m, debris flow ditch bed roughness n C =0.14, external resistance coefficient m=7.0, maximum safe discharge flow Q of downstream channel p =2400m 3 ·s -1 , the distance L from the mo...
Embodiment 2
[0122] The debris flow early warning system is realized on the basis of the first embodiment of the debris flow mechanical parameter monitoring system. Figure 2-1 It is the flow chart of debris flow early warning data analysis.
[0123] Step S1 to step S4 are implemented according to the content of the first embodiment.
[0124] Step S5, Early warning of debris flow occurrence scale
[0125] Figure 2-2 It is the flow chart of data early warning processing algorithm. The control center calculates the peak flow Q of the debris flow according to formula 9 in real time c , and according to Q c Maximum safe discharge flow Q with the downstream channel p =2400m 3 ·s -1 The scale of debris flow and the level of early warning can be determined based on the discriminant conditions of inter-time flow.
[0126] At time t-1, V C =8.9m·s -1 , γ c =1.95g·cm -1 , h=6m, then at this time, Q c =1602m 3 ·s -1 , as listed in Table 2, the system issues a yellow alert.
[0127] S...
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Abstract
The invention discloses a debris flow mechanical parameter monitoring system and a debris flow early warning system. The debris flow mechanical parameter monitoring system and the debris flow early warning system aim at overcoming the defects on debris flow occurrence early warning in the prior art. The debris flow mechanical parameter monitoring system utilizes a total stress monitoring value P and a flow debris flow depth monitoring value h which are obtained on a monitoring section D to calculate the volume weight gamma C and the mean velocity VC of the monitored debris flow in real time. The optimized design includes that the debris flow mechanical parameter monitoring system adjusts monitoring data frequency conversion acquisition and sending in accordance with the flow depth monitoring value h and a flow depth change value delta h. The debris flow early warning system realizes debris flow hazard grading early warning according to the peak flow characteristics of the debris flow and determines the expected time of the occurrence of the debris flow. The debris flow mechanical parameter monitoring system can perform real-time and frequency conversion monitoring and sending of characteristic indicators such as the flow depth, the velocity, the peak flow and the volume weight of the debris flow. The debris flow early warning system can realize the analysis of the debris flow mechanical parameter characteristics and the early warning of the occurrence of the debris flow.
Description
technical field [0001] The invention relates to a debris flow monitoring system and a debris flow early warning system, in particular to a debris flow monitoring system and a debris flow early warning system with debris flow mechanical parameters as monitoring values and critical conditions, belonging to the field of disaster monitoring and debris flow prevention and control engineering. Background technique [0002] Debris flow disaster early warning is to issue early warning information before a debris flow is about to occur or has occurred but has not yet reached the dangerous area, so as to gain time for evacuation and evacuation and reduce casualties. Its core is the scientific monitoring method of debris flow initiation, formation, movement, etc., and the reasonable determination of the critical conditions for disaster occurrence. [0003] Debris flow monitoring and early warning have always been important in the field of debris flow disaster prevention and control. ...
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IPC IPC(8): G01D21/02G06F19/00G08B21/10
Inventor 崔鹏严炎郭晓军葛永刚
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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