River network water flow quality real-time prediction method and device based on data assimilation

Abstract

The invention provides a river network water flow quality real-time prediction method and device based on data assimilation. According to the technical scheme, on the basis of real-time monitoring data such as the water level, the flow and the water quality of the river network, real-time monitoring data are assimilated into the river network water flow and quality model through the ensemble Kalman filter or the improved algorithm of the ensemble Kalman filter, the river network water flow and quality data assimilation model is constructed, and the computing efficiency of the data assimilationmodel is improved through a parallel computing architecture. Due to the data assimilation technology, water flow and quality model structure errors, inlet and outlet boundary errors and observation value errors are comprehensively considered; real-time observation data are fused to dynamically correct water level, flow and water quality concentration state variables and roughness and water quality parameters of the water quality model, so that the water level, flow and water quality concentration of a complex river network system can be dynamically predicted by adopting a river network waterquality data assimilation model and a parallel computing architecture, and the model prediction precision can be improved.

Description

technical field [0001] The invention relates to the field of water resources monitoring and management, in particular to a method and device for real-time prediction of river network water quality based on data assimilation. Background technique [0002] With the rapid development of urbanization and the rapid growth of urban population, the demand for urban water supply continues to increase, coupled with the massive discharge of industrial wastewater and domestic sewage, which makes the already prominent contradiction between supply and demand of water resources and water pollution problems more severe. How to draw water scientifically and rationally and discharge pollutants has become an urgent problem to be solved for the sustainable utilization and development of water resources and the protection of water environment. [0003] The mathematical model of the water environment is an effective tool to describe the hydrodynamic problems and the migration and transformation ...

AI Technical Summary

Problems solved by technology

However, directly bringing real-time observations into the mathematical model of water flow and water quality will lead to instability in the calculation of the equation and disharmony in the entire calculation area

For large areas, because the calculation of the hydrodynamic water quality model and data assimilation algorithm involves many river sections and complex matrix calculations, it will inevitably affect the calculation efficiency of the model

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