Debris flow is a special torrent carrying a large amount of solid matter such as sediment and stones formed in mountainous valleys by heavy rain, melting ice and snow, or the infiltration of underground aquifers. It has the characteristics of large flow, short duration, and strong destructive power. The sediment, stones, etc. carried by debris flow can be as high as tens of meters, and pour down from the hillside, often forming a "barrier lake". Once it collapses, it will cause great harm. According to incomplete statistics, the annual direct economic loss caused by mudslides in the country is about several billion yuan, and the casualties are even more. Therefore, strengthening the prevention and control of mudslides has become an important task at present.
How debris flows are formed:
1. The continuous occurrence of continuous rain, heavy rain, snowmelt, river outbursts and other water flows will cause the environment to lose balance and trigger debris flows; 2. The soil itself is loose in structure, and the debris is abundant and fused with a
steady stream of water. It is also easy to form debris flows; 3. Once debris flows aggregate in places with high mountains, deep ditches and steep terrain, it will be difficult to stop; 4. Certain stimulating
factors can promote the
formation of debris flows. Such as strong earthquakes, landslides, landslides and other geological disasters have created good source conditions for the formation of debris flows. In addition, strong human activities such as mountain quarrying, construction of reservoirs, and construction of biogas digesters are also inducing factors for debris flows.
How to do a good job in the prevention and control of debris flows:
(1) Strengthen the organization of flood control and flood fighting to ensure timely, efficient and scientific disposal of debris flows and other disasters;
(2) Strengthen the monitoring and forecasting of debris flows.
Before the occurrence of mudslides, there are often precursors, such as roaring noises in the ditch, cracks in the houses, and a large number of rocks on the hillside . Once these situations are found, they should be reported to the local government immediately and controlled under the guidance of professionals
; Do a good job in forecasting weather changes and monitoring and early warning of debris flow disaster risks.
The safety monitoring sensor can monitor the movement state of debris flow in real time, such as the speed, flow direction, and degree of danger of debris flow, and at the same time, it can monitor environmental parameters, such as meteorological, geological, hydrological and other data, in order to find signs or factors that may cause debris flow in time, issue early warning signals, provide reference and decision-making for prevention staff, and take necessary measures to prevent debris flow from occurring and avoid loss of personnel and property.