Information receiving and processing
The application of computer network system has effectively realized the automation of receiving and processing hydrological forecast information. The main function of the information receiving and processing system in hydrological forecasting is to extract the original information, classify, analyze and process the received information, and finally save the processed information in the information base to ensure the accuracy and effectiveness of hydrological forecasting information.
Computer information retrieval and query
In the process of hydrological forecasting, the retrieval and query of computer information can provide effective guarantee for mastering the change of water regime and real-time flood control information, and can also compare and analyze historical data. Computer information retrieval and query adopts fault-tolerant processing mechanism to ensure the safety and reliability of the whole system, and transparent processing is adopted at the server program end, which is beneficial to users to find problems during maintenance, so the user-friendly interface of computer information retrieval and query is required more.
Computer information retrieval and query focuses on data processing, including query system, graphic system, report system, data processing module and system monitoring. * * * together form the data processing mode structure, as shown in figure 1. Computer information retrieval and query can use electronic maps to link map data information with hydrological information, and truthfully reflect the actual situation through the hydrological forecasting center, which is conducive to the development of urban flood control and emergency rescue work.
Forecast service system
The main function of the forecast service system is to timely and effectively transmit real-time water regime and flood control information to urban flood control and emergency rescue work, which can effectively reduce the losses caused by urban flood disasters.
The forecasting service system in hydrological forecasting uses computer network technology to realize the timely transmission of flood forecasting information through Internet, computer network, voice automatic query, dial-up network and computer network.
The development and utilization of forecasting service system has changed the tedious and passive shortcomings of transmitting hydrological forecasting information mainly by telephone and fax in the past, enabling hydrological forecasting center to retrieve, query, save and print hydrological forecasting information through computer, realizing the sharing of data and information, which is advanced and timely, and providing a strong guarantee for the orderly development of urban flood control and emergency rescue work.
Hydrological forecasting system
The development and utilization of hydrological forecasting system can effectively reduce the workload of forecasters and realize the automatic development of hydrological forecasting technology, thus further improving the efficiency and quality of hydrological forecasting work. Hydrological forecasting system can make comprehensive use of GIS technology, network technology and other software technologies, and effectively use Visual Studio, Delphi and other development platforms to develop. All kinds of public resources needed by users for secondary development can be standardized through the standardized component processing of prediction mathematical model, analysis method and its operation interface.
Application of modern hydrological forecasting technology in urban flood control
The specific situation of urban flood control
The flood in a city is mainly caused by the rainstorm center, which is a flood disaster in this area and is also affected by the rivers in this area. Therefore, urban public facilities cannot be built and improved in harsh environment, and the task of flood control is heavy. The flood control strategy adopted is to "retreat to the heights when it rises." When the flood recedes, it will return to the lower ground. "If there are continuous storms and floods in this area, it will cause great losses to industry and agriculture and the safety of people's lives and property.
Modern hydrological forecasting technology plays an important role in urban flood control and emergency rescue, and it is one of the non-engineering measures for flood control. Because flood control departments and relevant departments such as shipping and water supply along the Yangtze River can receive the information transmitted by hydrological forecast in time and organize flood control and emergency rescue in time, hydrological forecasting technology plays a huge role in urban flood control and emergency rescue, minimizing the losses caused by floods to industry, agriculture and people's lives.
The role of modern hydrological forecasting technology in urban flood control
Since the flood occurred in this city, the government has incorporated the flood monitoring and forecasting task of major rivers in this area into the government management function, and gradually established a regional flood forecasting center, whose main function is to be responsible for the flood monitoring and forecasting in this area, and the flood monitoring and forecasting in other small watersheds is the responsibility of the local authorities. A hydrometeorological and flood forecasting center has been established, which belongs to the Water Resources Management Department of the Ministry of Urban Ecology and Sustainable Development, and has gathered experts in the fields of meteorology and hydrology. The main tasks of the center are to support local flood forecasting services, provide continuous flood monitoring information for mountain torrents, release possible flood disasters to local governments 24 hours ago, and provide flood information to the public in the form of daily flood warning maps.
Flood forecast is generally 2 ~ 3 days in advance, and the early warning accuracy is high. Provinces, cities and towns notify people step by step, and the channels for releasing information are mainly TV, internet, newspapers, or telephone inquiries. For particularly serious floods, the staff of the Hydrological Forecasting Center used ORSEC to conduct 24-hour observation on the spot. Some dangerous areas are monitored by helicopter all the time. When you need help, the first thing to do is to save people. With the support of flood forecasting service, first of all, we put forward a brief view on current hydrological events and publish a flood warning map.
The map uses color codes to represent the hydrological geographical network, marks the danger degree of monitoring river flood forecast, and describes the development of flood with additional labels. Flood warning maps can be obtained from the Internet. In order to publish the flood warning map, the staff of the hydrological forecasting center must monitor the flood every day. According to the meteorological warning chart (orange warning standard) and the water level measurement method standard, an alarm is issued. Hydrological forecasting integrates the functions of water conservancy, meteorology, health and other departments in flood control, effectively realizes the seamless connection between meteorology and flood forecasting resources, and exerts the application of advanced technologies such as information receiving and processing, computer information retrieval, query, forecasting service system and hydrological forecasting system in flood information monitoring, transmission, analysis and flood rescue in the process of hydrological forecasting, thus improving the city's flood control emergency capability.
Problems needing attention in the application of hydrological forecasting technology in urban flood control
Do a good job in all pre-flood preparations.
The application of hydrological forecasting technology in urban flood control work should be deployed as early as possible, and all pre-flood preparations should be made well. Carefully arrange and deploy pre-flood preparation and flood forecasting, and carefully arrange and deploy all links of pre-flood preparation according to the overall requirements of ideological understanding, forecasting measures, emergency plan, maintenance guarantee, technical strength and safety production.
Improve the technical level of hydrological forecasting
According to the new specification and database, the hydrological forecasting system, software equipment and forecasting scheme will be updated and improved, and the existing flood forecasting equipment will be excavated and integrated to ensure the smooth flood reporting lines of the main flood reporting stations; Modify and improve the software for receiving and transmitting reports to ensure the timeliness of water information; Improve and update the water regime inquiry system, rainfall isoline analysis system, satellite cloud image receiving system and flood control and drought relief command and decision-making system to improve the ability of rain regime analysis, prediction and consultation.
Through the development and utilization of these systems, the efficiency of hydrological forecasting has been improved, and a solid foundation has been laid for urban flood control departments to provide timely and accurate hydrological forecasting information.
In a word, modern hydrological forecasting technology provides strong technical support for urban flood control and emergency rescue, which can effectively reduce the losses caused by flood disasters. Therefore, we should improve the quality and service level of hydrological forecasting, so that it can make greater contributions to urban flood control.
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