洪水风险图推演实时性提升技术研究与实践应用OA

The national flood risk map compilation project for 2024-2025 has put forward new requirements for the development of real-time dynamic deduction capabilities,aiming to enhance the practical support capacity of the forecasting,warning,rehearsal,and contingency planning applications for flood and drought disaster prevention.Traditional serial processing modes for flood risk deduction suffer from slow response speed and poor real-time performance,which fail to meet the timely and efficient demands of flood control scheduling and decision-making.This paper conducted technical research on improving the real-time performance of flood risk map deduction.Based on the research and development practice of a real-time dynamic deduction platform for flood risk maps,this paper systematically sorted out the entire business process of flood risk deduction and identified performance bottlenecks in key links,including scheme loading,model calculation,data access,and visual rendering.By integrating key technologies such as high-performance computing,efficient data access,and server-side background rendering,this paper innovatively constructed a parallel processing architecture consisting of computation flow,data access flow,and rendering flow,which broke the traditional technical mode that performs rendering only after the completion of full model calculation.The optimized technical solution has improved the interactive experience and practical application effectiveness of the system platform and has been applied in real-time dynamic flood risk map deduction platforms of the Ministry of Water Resources,the Taihu Lake basin,and Anhui Province.By taking the 250,000-grid deduction scenario of the Mengwa Flood Detention Area as a case study,the results show that compared with the 15-minute waiting time for presenting flood analysis results in the traditional mode,the proposed architecture can output the first frame of deduction visualization results within 20 seconds,with each subsequent frame updated in only 2 seconds.It supports arbitrary suspension and termination of the deduction process,effectively improving the flexibility and timeliness of flood control decision support,providing a technical reference for the construction of real-time dynamic deduction platforms for flood risk maps in other provinces and basins nationwide.