Real-time hydrologic forecasting system

Abstract

The present invention provides a real-time hydrologic forecasting system. The real-time hydrologic forecasting system comprises a data input module, a model base and a data output module, and the model base comprises a grid unit runoff module, a sub catchment conflux module, a catchment river conflux module and a real-time correction module. According to the system, values or parameters adopted by calculation in the next forecasting can be appropriately adjusted by utilization of up-to-date information obtained during the forecasting process, a series of previous forecasting error information including the current period are considered for each forecasting, the future prediction value is corrected according to the tracking technology of the automatic control theory, and hydrologic forecasting precision is increased. In addition, the system is based on a distributed Xin'an River model based on grids, and compared with a traditional model, the system can be operated for a catchment having few data. The system has a visual interface, and operation practicality is high.

Description

technical field [0001] The invention relates to the technical field of hydrological forecasting, and more specifically, to a hydrological real-time forecasting system. Background technique [0002] Hydrological forecast refers to the qualitative or quantitative prediction of the hydrological situation of a certain water body, a certain area or a certain hydrological station for a certain period of time in the future based on the previous or current hydrometeorological data. , effective use of water resources, etc. [0003] At present, hydrological forecasting is mainly based on hydrological models. The research on watershed hydrological models began in the 1950s, and began to flourish from the 1970s to the mid-1980s. Classified according to modeling principles, watershed hydrological models can be divided into conceptual hydrological models and system theoretical hydrological models. For conceptual Hydrological models can be subdivided into lumped conceptual hydrological m...

AI Technical Summary

Problems solved by technology

This leads to the model ignoring the spatial distribution differences of the hydrological process, and cannot reflect the influence of the underlying surface characteristics on the rainfall runoff process

[0005] ②In the past, due to technical limitations, many watershed information and features could not be obtained in a timely and accurate manner. Although with the continuous development of digital elevation model (DEM), 3S technology and radar rain measurement technology, rainfall and topographic data can be obtained more conveniently, However, since this kind of data is mostly based on the digital elevation model and is in the form of a grid of a specific size, the traditional hydrological model cannot make full use of the large amount of data provided by these new technologies, making the model operation lack of practicability

When a hydrological model with fixed parameters is used for hydrological forecasting, the forecast results will inevitably deviate

At the same time, due to my country's vast territory, numerous rivers, and complex terrain, flood disasters occur frequently and are complex and changeable, causing huge losses. Traditional hydrological forecasting is difficult to meet the requirements of fast and accurate forecasting and scheduling. Therefore, the concept of "real-time" is introduced. Correcting the hydrological forecast model in hydrological forecast can improve the accuracy of flood forecast, which is of great significance

[0007] ④ The hydrological forecasting system should focus on practicality, while the system without a visual interface has high technical requirements for operators, and it is not easy to enter and read data, and its practicability is weak

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