The establishment of flash flood warning system provides an important support for forecasting flash flood disasters in advance, demonstrating modern science and technology, embodying the achievements of modern human scientific and technological civilization, realizing all-round, multi-level and three-dimensional early warning, serving the society efficiently and quickly, and effectively reducing or avoiding casualties and property losses caused by flash flood disasters. This early warning system is powerful and practical. It meets the requirements of prevention and control of mountain torrents in different regions. This is a popular system. Key words: flash flood warning, scientific and technological disasters, flash flood warning system, 1. The causes of mountain torrents are natural factors such as meteorology, geography and geology, as well as human factors in production activities. Among these two main factors, natural factors make the flood sudden, periodic and random. Man-made factors have accelerated and aggravated the occurrence and development of floods, making the disaster more serious. Moreover, different regions have different characteristics. The main causes of mountain torrents are: 1, concentrated rainfall and blocked water system, which are the direct causes of mountain torrents. Liuyang has great terrain difference, steep slope, large-scale rainwater collection, rapid water flow and short-time confluence cutting, which is easy to induce flash floods. It determines the susceptibility of landslides. The surface rock structures in China are mainly slate, metamorphic sandstone, argillaceous slate, argillaceous sandstone and conglomerate, followed by granite invaded in the late Yanshan period. Due to the ancient stratum and severe weathering, the surface of the corresponding soil-forming parent rock is mainly slate, sandstone and gravel, with poor water retention capacity. Affected by heavy rainfall and corresponding floods, it is easy to form streams and rivers surging, causing geological disasters such as landslides. The slopes of China are very high. Vegetation in some mountainous areas is seriously damaged. Metamorphic sandstone and argillaceous slate have high sand content and low gum content, which are easy to decompose and move when they meet water. Under the action of rainfall and runoff, soil erosion is easy to occur. 3. Illegal buildings and frequent activities increase the loss of mountain torrents. With the continuous development of economy, extensive farming on steep slopes, urgent road repair, instant mining and littering with waste slag have increased. Continuous siltation, accumulation and other production and construction activities are destroying natural vegetation, and soil erosion continues to deteriorate. Over-cultivation in hilly areas leads to fossilization and desertification of slope soil in sunny days, and effective measures for soil and water conservation are rarely taken in production and construction. Sand mining and gold panning blindly pursue economic benefits without river restoration, which leads to river diversion and coastal erosion. These activities ignored the harmony between man and water and aggravated the evolution of mountain torrents. 2. On the characteristics of mountain torrents, mountain torrents not only caused heavy casualties and property losses, but also left many hidden dangers of landslides and collapses. These hidden dangers are very likely to erupt again under the inducement of factors such as heavy rain, which directly threatens the life safety of local people. According to the statistical analysis of mountain torrents in recent years, mountain torrents mainly show the loss of national economy and people's property caused by landslides, mudslides and stream floods. Mountain torrents generally have the characteristics of locality, flower arrangement, and sudden and paroxysmal time. First of all, they are seasonal and have a high frequency. Second, they are regional and prone to disasters. Third, they are fierce and prone to disasters. As the saying goes, "the mountain is high and steep, and the stream is dense." Numerous gullies and streams converge with fierce floods, which sweep downstream with lightning speed, often with destructive power for several hours, and it is impossible to prevent. Fourth, it is destructive and harmful. Fifth, it is difficult to recover. Mountain torrents often cause devastating damage to infrastructure such as water conservancy, transportation, electric power, communication and farmland, and the achievements of the masses in decades of construction are destroyed. Many farmland and other infrastructure damaged by landslides and mudslides are difficult to recover in years or even decades. The market towns in mountainous areas have been flooded and seriously damaged, and the market towns are often the local economic development centers, which makes the originally underdeveloped economy worse and brings great difficulties to the people's life of rebuilding their homes and resuming production after the disaster. 3. On the harm of mountain torrents, floods often happen instantly, which is hard to prevent. Mountain torrents and mudslides caused river diversion, road interruption, farmland flooding, house collapse, human and animal deaths and so on. Because of their suddenness, they are more harmful and destructive, especially in terms of casualties and infrastructure damage, which often greatly exceeds the lake area, and the infrastructure is destroyed, causing great disasters to people's lives and property. 4. My flash flood warning has a broad market not only in China, but also in the world. Every country has different early warning measures. I advocate flash flood warning. First of all, it is necessary to attract foreign investment and enhance the company's economic strength. The way to attract foreign investment should be all-round, multi-level and multi-angle. Secondly, the key point is to improve the scientific and technological content of this early warning system. Scientific and technological innovation will lead the new era, combine early warning research with the market, and take the real market-oriented road. Who can occupy the advanced and practical nature of early warning in the future market? Who will dominate the market? There are still many innovations in early warning waiting for us to develop, study and discuss, and there are still many new things in early warning strategy that have not been developed. All these need to be discovered by people with heart in 2 1 century. The utilization of new energy and the birth of new tools will trigger an epoch-making revolution. When the Iron Age replaced the Stone Age, machines replaced manpower, and large-scale factory production replaced the manual production of individual workshops, the lifestyle of human beings changed greatly in the industrial revolution. It has brought human history into a brand-new period. When the electric power era replaced the steam engine era, emerging electric energy, as a major energy form, dominated social and economic life, and a historical period that no one had thought of before began. With the wide application of electric power and the success of long-distance transmission, cable telegraph, telephone, radio communication and television have developed one after another. The real driving force for the emergence and development of various communication technologies is the needs of society. Since then, mankind has really entered the electric power era. Electronic computer is a machine that replaces people's mental work after the steam engine era and the electric power era, and its core technology is electronic computer technology. The emergence of computers has led to a lot of high-tech development. With the information industry in full swing today, a technology in the field of new materials has attracted great attention from governments and industries all over the world, that is, nanotechnology. It is predicted that the worldwide technological revolution and industrial revolution caused by nanotechnology, which is at the forefront and core of high technology in the 2 1 century, will have an impact on social economy, politics and national defense. Will have a greater impact than the previous technological revolution era. Nanotechnology will set off a new wave of technology and lead the next industrial revolution. Mankind will enter a new era-the era of nanotechnology. Can we use new early warning methods and strategies to improve the scientific and technological content of early warning practicality and achieve new early warning breakthroughs, thus creating an epoch-making early warning revolution? This is a problem we will face in the future and we must innovate. We must actively innovate in all aspects in combination with the company's current situation. Human society always replaces the old productive forces with new ones, and constantly pushes the history forward. The scientific and technological revolution is an important driving force in the social dynamic system, and the modern scientific and technological revolution has a far-reaching and strong impact on the development of human society. Because the modern scientific and technological revolution makes the way of thinking systematic, integrated, open, dynamic and creative, it also makes cognitive activities tend to be mathematical, modeled and formalized. It promotes the transformation of production mode, lifestyle and thinking mode, and realizes its cognitive function by discovering new facts and phenomena, explaining essence and laws, and predicting future events. Science and technology can be transformed into direct productive forces and promote the development of production. Science and technology are the primary productive forces, and productive forces are the most revolutionary and active factors. With the improvement of productivity, technological innovation will greatly promote the improvement of early warning ability, so the scientific and technological revolution mainly promotes social development by promoting changes in people's production methods, lifestyles and ways of thinking. Geographical environment or natural environment is the natural condition for human survival. The essence, basic characteristics and basic forms of practice determine that practice has a basic and fundamental position in human life. Through the continuous social practice of human beings, with the deepening of the understanding of mountain torrents, from perceptual knowledge to rational knowledge, from external to internal, from practice to theory, from theory to practice, the leap from rational knowledge to practice is realized, and the law is the inevitable trend of the internal connection and development of things. With the deepening of our understanding of the laws of nature, the science of early warning of mountain torrents has been continuously improved, the technology has become more advanced, and it has more motivation to change the living environment of human beings, let nature create wealth for human beings, and actively use the positive side of nature. Prevent it from being negative. The world is a moving world, and everything is moving. As long as we make good use of the laws of nature, with the deepening of human understanding of mountain torrents, the disasters brought by nature to human beings will gradually decrease. 5. On the personal view of mountain torrents, our company actively develops early warning software that embodies the characteristics of modern science and technology, and forms a powerful early warning system together with certain hardware technology and software. According to the existing historical law of mountain torrents, using wireless communication technology, the early warning across time and space can inform the arrival of disasters in advance. In the past, when flash floods came, people had to wait for death. Due to the suddenness of mountain torrents, the flood was fierce, and people were swallowed up by the flood before they could escape. Nowadays, with the help of software technology, people can predict the arrival of flash floods in advance, greatly reduce the losses caused by floods, and even use the characteristics of floods to prevent flash floods. This is also the first step for mankind to conquer and transform nature, and it has taken a successful step. There is no limit to human wisdom. In today's era of knowledge explosion, it is emphasized to conquer and transform nature with wisdom and technology for the benefit of the people. 6. Conclusion 1. The prevention and control of mountain torrents involves meteorology, water conservancy, hydrology, geology, environment and other disciplines and departments, and it is a complex systematic project. It should be studied as a special science of disaster prevention and reduction. With the continuous development of network communication technology, we should constantly improve and adopt the most advanced technology to make data collection more accurate and timely, and establish a relatively complete research system for mountain torrents monitoring and disaster prevention and mitigation measures. Analyze and determine the critical value of possible mountain torrents in this area. By analyzing the rainfall data of the whole county over the years, the critical value of small watershed early warning is more accurate, so as to get a more accurate early warning and forecasting structure. 3. Intensify publicity, and publicize the popular science knowledge of mountain torrents prevention and control by using conferences, radio, television, wall newspapers, slogans and other effective forms that are easy to understand and love to hear, especially for the cadres and the masses around the hidden danger points of disasters, so that the cadres and the masses can master it correctly. Enhance the awareness of the whole people, especially the threatened areas, and improve the ability to resist disasters and reduce disasters. Organize local personnel to conduct actual combat drills. Flood control institutions at all levels should regularly hold different types of emergency drills to test, improve and strengthen emergency capabilities. In view of all kinds of dangers that are prone to occur in this area, professional rescue teams must conduct actual rescue and disaster relief drills every year; In particular, drills for emergency rescue and disaster relief and evacuation. 4. At present, the non-engineering measures for the prevention and control of mountain torrents are relatively weak, and only stay at a lower level, such as compiling the risk map of mountain torrents, establishing early warning systems, and publicizing and educating. In addition to further studying these technical measures, it is necessary to carry out research work involving policies, decrees, administrative management, economy and other aspects, and study and formulate relevant policies and regulations, especially to increase engineering measures and non-engineering measures for mountain torrents prevention and control.